BURN THE WITCH!!! People say you need several tonnes of rotting American cast iron to cut steel, much less titanium. Despite what we just watched, it's impossible to cut steel on a desktop machine, everyone knows this. Seriously great work! You've done a lot that isn't shown or discussed much around here, and produced great results. Parts within a few microns of nominal, or at least better than you can measure. I would love to see more details on the pneumatic draw-in spindle mechanism. Also definitely would not be bored to hear about the design choices you made mounting the ballscrews and other motion components.
Awesome comment :D thank you - I appreciate it! Yes, there was quite a bit of research and testing going into the design that’s not discussed in this video. Iterations I had to make, because I wasn’t pleased with the result… At the moment it will be difficult for me to find the time to do an additional video about this machine, since I‘m working on different things I am going to share in a few weeks. Until I finished those I plan to do a more detailed video about the design and especially the ATC, since your not the only one that seems to be interested in this :)
Add one vote for your evolved thoughts on spindle design and construction. That's genuinely some green field territory on RUclips, especially a pneumatic design.
Waow! One of the smartest little cnc I have ever seen, love it. You've done a terrific study and your skills are impressive. You need to show us a detailled serie of vids about your cnc, from birth to achievement, please🙏🙏🙏 👌👍🖖
Thanks! At the beginning I didn‘t know how it‘s going to look like at the end, because intentionally I just planed to upgrade my former CNC ... this plan changed a bit. That‘s why I haven’t token any further videos, just pictures of the building process and a slide show is probably not this exciting...
@@EngineeringSpareTime bro can you share the cad file of this little monster? please aka.vandalo@gmail.com (or well, just the spindle would help me a lot)
Congratulations on your work. I admire your work a lot because I have been building a similar project for 6 years. I have also built the atc spindle with many hours on the lathe and dedication. I do not have engineering studies, but for many years I have built small machines that have given me a lot of personal satisfaction. Socially I notice that there is a lot of misunderstanding of people with our concerns, they think it is stupid to make a spindle and spend a lot of hours on something that you can get for 550 dollars. Congratulations on your talent. Greetings from Barcelona
WOW... just WOW... what an amazing job you did here. When I saw you machining the spindle I was like: "Wait... he made his own spindle, air cilinder and automatic tool changer!?!?... amazing" Keep up the excelent work.... and upload some more vids, please! :D
Thanks a lot! I still have some older projects I could share (mostly slide shows.. I mainly took pictures) and I‘m currently working on a 6 DOF robot arm, this will take some time to finish though :) I could release some “early stages“ of the build, if this is of interest..
This is an exceptionally engineered mill all round. Few would even consider building their own spindles. Seems extremely rigid for an 80kg machine too; that concrete must be ultra-high performance indeed.
That is just beautiful! And you made your own spindle! Any more info about making the individual parts or any new projects would be great if you can find the time. I've been trying to refurbish an older machine on weekends and after work for a couple of years now and know that it can take hours upon hours to do. And you can't really put a price on something like this that you clearly have lovingly designed and built with your own hands (and lathe). Any thing that you would like to share about this journey would be eagerly watched and rewatched.
Thank you, I appreciate it. I still have some older projects to show, which might be interesting as well as a current one. I‘m in the process of building a 6 axis robot arm from scratch (aluminium construction) including the driving system (servo driven) and programming. The mechanics of the first four axis are basically done. When I find the time, I‘ll make some videos in the next weeks. I checked out your channel, looks like a really nice machine! Yes, such projects involve a big effort, but totally pay of in terms of learning and fun - in my opinion.
It was great pleasure for me, to watch this video clip. I have read almost the whole discussions with your answers. It was very nice, to read your professional opinions, written with a lot of patience sometimes. I wish you many health primarily, many successes in your professional career, and private life also.
I’m glad to hear that you enjoyed it and appreciate your words :) When I choose what I’m doing, being patience is natural - in my opinion. Thank you, wish you the best too!
Hands down the best DIY CNC mill I have seen, only Piotr's build is comparable in sexiness. Sounds super smooth cutting steel/titanium, leaves a pretty good surface finish, large work envelope for such a compact machine, well thought out way covers and even has proper closed loop control with servos. That spindle blew my mind. Awesome. The video description answers most of my questions, but how much does it weigh? What controls are you running, LinuxCNC?
Thank you, I appreciate it! Yes, Piotr‘s machine is a nice one. There are some other really nice ones too. It weighs about 80 to 90 kg - I haven’t weighed it in a while. I run an old version of Mach 3, cause I was used to it from a older project. For the upcoming portal machine, I‘ll use LinuxCNC.
Absolutely beautiful, stunning work! It is a maddening journey to build something like this at it warms the heart to see a finished one like this. I have been working about the same amount of time on my own build and the scope has creeped so far. A 300 pound Z axis is sitting on my workbench in the garage. It's happening...
Thanks a lot! Yes, I totally agree. It‘s way more work then you‘d expect before - so many small things to solve and to decide. But this is what makes it‘s so rewarding at the “end“. Just keep doing it! I‘m also building a „“big“ one together with a friend of mine, for the last four years. We‘re getting there.. 😄
Absolutely amazing! Well done. I have been considering something similar. I love how you executed everything. They turn into such big projects, don't they? Fantastic work.
Nice machine! Wonder what ratio the spindle has from the motor? Maybe it is like 3:1 or 4:1. So max 24000 rpm from motor will give about max 6000 rpm on spindle? Was this the idea to get lower rpm? Could be that you wanted a tool changer and those can only run max 8000 rpm or something. You said you used a 12 mm ball screw (the good one) and a SKF 7201 bearing. The bearing is 12 mm inside. Does that mean that you put the threads in the bearing directly? Maybe the ball screw was machined in the end but that would make me think that it would be more like 8 or 10 mm and different bearing was to be used? What is the stiffeners made of?
Thank you! The ratio is about 2.3:1 -> Max. 11 000 rpm. I did this to increase the torque at lower speed. Otherwise the torque would have been to small for milling high strength materials (e.g. carbon steel..) and the bearing lubrication of the main spindle is critical at higher speed with this diameter.. for the tool changer it’s not a problem, especially not if you build it yourself :-) For the bearings: Good point! I machined an adapter and shrink fitted it on the machined end of the ball screw (it was 8mm OD) to achieve a proper shoulder for the bearing
Love this!! Im inspired to do something similar. What linear rails are you using on the x, y and z? Looks like the Z is 20mm? Also, how did you decide to do a separate spindle / motor?
Hello, I am curious to know which controller card you have used for mach3, I would also like to know if you consider the operation of macros in mach3 to control tool change reliable. Greetings
Thanks for your comment. I am using an ESS SmoothStepper and additional break out boards for GPIO. The version I am using is most likely obsolete, since I have ordered back in 2015. Yes, I'm planningto use macros and a ModBus conntection to operate the ATC. Unfortunately, I couldn't find the time to fully utilize it yet..
Hi, amazing machine! I was very surprised by the rigidity of the components. Was the spindle head made up of aluminum pieces, or was it a steel construction?
I assume you now have your degree by now. I am a CNC / Manual machinist for 45 yrs, worked in 17 shops, operated over 50 different cnc mills. From my experience with the engineers, the best ones have machining experience. You are off to a very successful career. That mill is sweet and you learned a lot. Try to incorporate manufacturing into your designs and make sure your boss knows how much $$ you saved them. Don't be bashful, toot your horn some.
I really appreciate your words and can totally relate! Making components yourself first gives you an understanding of what is important during development. Of course I need longer or even more attempts for the components I make, but in a professional context a much more productive level arises on which you can exchange ideas with the experts in the field - like you - and find a solution together. We can all learn from each other and that is, in my opinion, the fun of it all. Thank you!
@@EngineeringSpareTime I agree, working together to solve problems is fun and the experience gained and shared keeps our world moving forward. I am Happy for you and your workmates, knowing your future will be rewarding.
I saw your comment on NYC CNC's Tormach Tech video and, thankfully, clicked. What a beautiful "DIY" build. (I quote DIY because I suspect there aren't many people - myself included - who would have the skill and patience to execute such a build.) Can I ask a few questions? 1) Now that you've had this machine up and running for a few months, is there anything major that you would have done differently in retrospect? 2) Is there a reason that the machine rapids for the ATC are that slow, or was this just filmed in the early days when you weren't totally confident in its operation? 3) You mention the Clearpath servos; I'm curious what you think about them?
Thank you! 1) For what its is I am quite happy how it turned out. I would have done a few things differently, would have designed things differently but for the time I was building the machine this is what I was able to do with my resources - knowledge, tools and budged.. For example: I would have liked to nitride the spindle shaft, use even more high quality bearings and linear rails (the spindle once and the ball screws are top quality..) and so on. 2) Yes, this was in the early stage and actually the first test of the ATC - so I started slowly (this was at about 300 mm/min, now it’s capable of 14m/min - I should make a video about it) :) 3) So far the clear path servos doing great. The implementation was straight forward, the performance is way more than enough (they actually run at 40% torque limit, otherwise they could rip everything apart). The tracking error and disturbance rejection is also good. They are more expensive (double the price compared to e.g. JMC), this is still cheap in comparison to a “actual“/ industrial grade servo drive (not the same “quality“ obviously).. For the next CNC I would order the free programmable version to be able to implement my own control algorithms to enable model based temperature compensations and stuff like this, its not really necessary though.
This is awsome! I'm building something similar. Would you like to make a little cash and make another one of those spindles? Trying to find one capable of 24k rpm and have neumatic atc is a pain. You seem to have it down.
Thank you! Unfortunately, at the moment I can’t build you another one, because I couldn’t offer it to a reasonable price.. With my small lathe it takes a lot of time to machine and to get it working perfectly. Thanks for you interest though! Maybe I’m able to produce them more efficient in the future - we will see :)
Thanks! The build evolved over the time, so it‘s probably not the most efficient way to build it like this (e.g. more than 300 screws :D). That’s why I‘m not sure if someone would like to build it like this or should.. I‘d have to refine the plans and CAD for that to quite an extant. Due to my current projects and studies, I have to delay this.. But nice to hear that you would be interested in something like this, I’ll try to figure something out.
What spindle are you using? I’m in the process of building a machine as well and can’t find a spindle with a low enough rpm and high enough torque to machine anything harder than aluminum.
The motor is a water cooled China 2,2 kW spindle, reduced by a belt drive -> max. spindle rpm is around 12000 rpm. The spindle cartridge with the tool changer is diy. For even higher torque I’ll upgrade the inverter to a vector driven one
@@EngineeringSpareTime Can you see how much power is actually being drawn by the spindle? i am currently upgrading a machine and have a 1.2kW DC motor to fit its max rpm is only 4200 so i was thinking of gearing for at least 8000.
Luc Davenport It’s possible to see check the power in the inverter ui, I didn’t check it though. How much power is actual needed, always depends on the cut you take. Lighter cut -> less power.. 1,2 kW should be enough for most operations up to a diameter of 6 mm.
Overdoing - I don’t know what you‘re talking about :) Danke! Begeisterung übersteigt manchmal den Nutzen und da beginnt der Spaß! Ebenso, schöne Maschine und schicke Spindel ;)
Amazing work! Maybe you can explain a bit more about base. There is metal (I think aluminum) plates cast in concrete? Or by UHPC you mean something else? How did you machined these parts at home wit such great precision? I'm just hawing problems with smaller parts...
Wow. That's an incredible project. I'm wondering - how much it weighs? The steel milling capability looks very impresive for this size of machine. Love the design.
That was one hell of an impressive desk CNC mill, very well thought out, compact, and yet still super accurate from the looks of those measurements you took of your test cuts! If I may ask, about how many € did you spend on it without that toolchanger? Was the frame made out of steel, or aluminium? And what material were those black side panels made from?
Thank you! :) the overall build excluding the ATC the spindle motor and the servo system (those are exchangeable..) was about 1.2k - building it like this decreases the price, increases the involved work though.
It’s triggered by the Emergency Stop Button with cross-circuit detection and a optional switch for e.g. an enclosure door. There is a 24V signal for e-stop that’s connected to the sps, a contractor for the spindle motor, a signal to the inverter and Servo drives. The servo encoders and the mcu are always powered. I hope this answers your question
Thanks! I “just“ had the lathe available, no milling machine was used. The lathe is the only actual tool I‘ve used. You could check if someone close to you lets you use their lathe ;) At some point you need some turned parts. Building a machine like this without a lathe is nearly impossible - except you buy all the components finished...
Just wondering, do you have any drawings of the ATC spindle? i got all the tooling to make one of my own, been trying to design one myself but i keep getting stuck and confused. even more pics of the spindle would help!
Love the machine. Could you please tell me what the depth of the machine is? Basically the length of the bottom on the side stiffening plate. I want to get a feel for the size of the machine.
In one end two of 7201 in O-arrangement. On the other end you want to use a “floating“ bearing that allows lateral movement to compensate for temperature elongation - e.g. a needle roller or a regular 6000, 6200.. You can also get of the shelf bearing blocks - easier to use if the implementation is possible.
Thanks! This layout has some advantages in terms of stability and stiffness, the effective working area is smaller compared to e.g. a portal though. It’s like a Industrial VMC
Sehr schöne Maschine! Hut ab! :) auch die Genauigkeit ist einfach klasse! Wars schwer den UHPC Körper zu gießen? Woher hast du diesen bezogen? :) Und was für Motoren und für ne Steuerung verwendest du? viele Grüße!
Danke dir! Das Gießen war nicht all zu schwierig - lässt sich mit der richtigen Vorbereitung gut verarbeiten. Ich habe den UHPC von moertelshop.com bezogen. Dieser wird dort „TEGNO“ genannt. Bei den Motoren handelt es sich um ClearPath Servo Motoren. Die Controller sind bei diesen direkt im Servo integriert. Ich habe zunächst Schrittmotoren verwendet. Als alles soweit funktioniert hat, habe ich mich dann dazu entschlossen die Servos zu kaufen (definitiv mit Abstand das teuerste an der ganzen Maschine (etwa 50%), das war es mir am Ende aber wert :) ). Diese sind ebenso durch Step/ Dir anzusteuern, was die Implementierung damals vereinfacht hat.. Ich konnte so meine Steuerkarte beibehalten. Als Steuerkarte verwende ich einen SmoothStepper mit BreakOut Board für die IOs. Bezüglich der Genauigkeit, war das gezeigt natürlich auf den relativ kleinen Bearbeitungsbereich zurück zu früheren. Insgesamt spielt sich die Genauigkeit vereinfacht angenommen, mit entsprechenden Schnittparametern und Verfahrwegen, im Bereich eines Hundertstels ab - womit ich sehr zufrieden bin :) Wobei man nicht vergessen darf, dass Genauigkeit ein weit zu fassender Begriff ist.. Stichwort: „Maßverkörperung“
@@EngineeringSpareTime ok danke für die Infos! :) gibt es eine deutsche Bezugsquelle für die Clearpath Servos? Warum hast du nicht (wie viele anderen auch) die iHSV57 Servos genommen?
@@andysen1987 Gerne. Eine deutsche Bezugsquelle ist mir nicht bekannt. Ich habe meine direkt aus den USA bezogen. Die iHSV57 waren vor 2,5 Jahren, als ich die Servos gekauft habe, noch nicht all zu verbreitet und auf dem Stand. Zudem hat mir das Gesamtsystem der Clearpath besser gefallen: Passendes Netzteil, Encoder bleiben auch beim Notaus unter Spannung (Topologie Frage selbstredend..), Leistungsfähiger, AutoTune Fähigkeit mit vernünftiger Software, mit dem richtigen Stecker und Schaftdichtung eine vernünftige IP Klasse und vor allem es gibt einen Support. Der Preis ist allerdings der doppelte.. Die JMC haben sich in den letzten Jahren verbessert in Hinsicht auf Doku und Funktionalität, sodass man diese mit Sicherheit in einem Projekt gut verwenden kann. Der Preis von den JMC ist natürlich Top. Letztlich ist es wie so oft eine Einstellungssache :) Ich hätte auch welche von Siemens genommen wenn der Faktor 4 (min.) nicht wäre :D Übrigens verwendet Tormach ClearPath Servos in ihrer X Serie, das hat sich auch in diesesem Zeitraum erst aufgetan.
Really cool!! I intende to build one like this, that I can use to automatically mill blades from old files (keeping the original heat treatment, no annealing), just a bit more X travel but the rest is great. Could you help me or send me links to papers or videos that might help?
They are made from S355 construction steel - laser plates.. The idea of the cut outs is to reduce surface deformation in X direction due to vibrations close to the eigenfrequencies (changing the vibration modes...), this shape is still stiff in Y and Z direction though. And it looks way cooler like this ;)
@@ewildgoose I just roughly calculated the nominal frequencies of the spindle motor, spindle shaft and according cutting frequencies. Some of the spectrum equals the vibration mode of the plate without the cut outs, so I decided to add them. If this was necessary is questionable, the plates are not vibrating or ringing though..
Thank you! The bom is kinda short: - disc springs - 7007 and 7006 from NSK -> spindle bearings - 3.5mm ball bearings The rest is custom and made from stock material :)
Could have a optical sensor just above the tool sensor. That way it could go faster down and slow when optical sensor is triggered. The optical sensor could be a part of the whole height sensor.
It`s a combination of practice and theory. A degree in mechanical engineering or/ and an apprenticeship in metal craft definitely helps - it’s not needed though. Everything can be achieved just with a good amount off passion. Start small, keep working/ learning and everything will come together over the time :) I started building my first mini milling machine 6 years before I approached this one and I didn’t had a degree at this point or any tools that were needed. I just used books, forums, basically everything I was able to find as a source of knowledge..
Thanks! I kinda used the “best“ stuff which I was able to get and not 100% what I would have liked to use (due to cost). But anyway: The Linear rails X and Y: HIWIN MGWR09 + carriage WGW09HZ1HM (sounds small, C_0 is 5.9 kN though..). For the Z axis: HIWIN MGN15HZ1HM. Both types with light preload (Z1). For the ball screws - I was lucky - I could get my hands on some ground 12mm P5 ball screws from STAR (Rexroth) check the video 10:43 .. normally those would have cost more then the rest of the machine (without the servos and spindle motor). For the ball screw bearing arrangement, I used precision spindle bearings from SKF 7201 (good bearing are important! Everything else is not worth the time..)
@@EngineeringSpareTime Thanks for the quick reply! Yes very impressive. It's amazing how much performance you can get from relatively "light weight" linear motion components. I see a lot of over-built machines that don't perform that well. Any chance you have more info on that home built spindle cartridge? Even a video with some pictures and dimensions. I know a lot of us would be very grateful, as it's a bit of a stumbling block (for me anyways). Cheers!
Devin Moodley At the moment I‘m building a big CNC Machine, that is not light weight anymore - I could built this machine with the new one so much more efficient :) This small bench top machine is very practical in a sense of space, weight, speed and capability (it’s quite precise..) though. The working area in X, Y, Z is enough for most of the stuff you do. I didn’t take to many pictures of the spindle, cause it took for ever to machine it with this small lathe and I forgot about it. I have to think about this, it was definitely no straight forward to build the spindle cartridge completely from scratch (incl. the pneum. cylinder), I learned a lot by doing this, and would do it a bit differently next time - I might not be happy with releasing/ showing this “80% spindle design“
@@EngineeringSpareTime I'd love to see a video discussing what you would have done differently with the spindle. There are so many "My First Cnc Router!" videos out there and not nearly enough about precise and rigid machines like this!
BuySomeApplez If there is interest in this, I‘ll think about making a video about the thought process and construction of such a spindle cartridge. “My first CNC router“ is a nice way to say it - “Machining metals“ has sometimes different meanings :) Yeah, there are really just a view - mostly bigger machines. This was actually part of the motivation of making a a video about my machine..
Thank you! Yes, this would be possible for example with a electric motor and a short lead screw or some sort of mechanism that gives mechanical advantage. Downside of this would be the size and cost, since such a mechanism would be larger and more expensive then a single pneumatic cylinder - sure you need a compressor, that doesn’t need to be huge though and most of the time one is already used for cooling
As you meantion it there are these small type of car tire inflators that could get a pressure up to 10 bars(100psi?) and you already have them at home. They are small but maybe they are just enough to suck the cylinder If used as a compressor.
Dude. What in the world. How…how are you doing that stuff in your spare time. I’m over here working on how to design a robotic arm for months now and not getting anywhere.
Haha, thanks. I've literally been doing this my whole life and all the time - all in all, that's a lot of spare time :-) Your experience will influence your approach, decisions and confidence in each project, thus you “just” have to start, try, fail, redo and you’ll get somewhere with it. If you are trying to build a robot, build it the way you are confident with it, add 30% uncertainty and go. Trying to build what other people build is not really an approach I’d take - as inspiration for sure
@@john1987742 This is what I was able to get at the time - I would have otherwise used a size larger. In retrospect I can’t complain about them.. they might not be this long lasting, we will see though. And according the rigidity, the video might give an impression of it.
Hallo, interessantes Projekt was Du da gemacht hast... Ich baue auch gerade eine 3-Achs CNC mit UHPC (Mörtelshop). Mein großes Ziel wäre eine Erweiterung auf 4/5-Achse. Ich habe bisher noch KEIN Hobby/Privat-Projekt gesehen was das gut kann. Mir würde auch schon 3+2 "reichen". Industrielle Lösungen sind i.d.R. viel zu teuer. Von SKCNC gibt es zwei Dreh/Schwenktische; weit über 10k €. Dazu eine Industrie BECKHOFF-Steuerung auch für weit über 10k. Mit LINUX-CNC soll das auch möglich sein....???? LG aus HH
Hallo und danke! Ja, da ist was dran. Viel gibt es zu dem Thema nicht. Ich habe bereits eine 5-Achs-Erweiterung mit einem Bearbeitungsraum von 100mm (im Würfel) konstruiert. Ich muss nur noch die Zeit finden die erste Einheit zu bauen und zu testen. Außerdem plane ich an einem Bau einer kleinen möglichst erschwinglichen integrierten 5-Achs-Maschine (die ganze Maschine sollte deutlich unter 10k liegen..) - das wird sich allerdings noch etwas ziehen.. Möglich ist der Bau auf jeden Fall auch die Implementierung mit Linux CNC wird funktionieren. Soweit ich weiß arbeiten Alex CNC und talla83 schon länger an einer 5-Achs-Erweiterung. Diese wird mit Sicherheit mit Linux gesteuert. Welchen Bearbeitungsraum sollte eine 5-Achs-Erweiterung bzw. kleine Maschine deiner Meinung nach haben?
@@EngineeringSpareTime Hallo, das 5-Achs-Projekt von Alex und Peter habe ich gesehen. Ich glaube, da kommt aber nichts mehr...? Alex baut jetzt ja an seiner großen Fräse. Ein sehr großes Problem sind auch die HARMONIC Drive Getriebe >> teuer, schwer zu beschaffen. Aber, ich habe gesehen Du beschäftigst dich auch mit Getrieben. Ich selbst mache Rotorköpfe für Modellhubschrauber. Dafür wäre ein 5-Achs-System schon super ! 100mm Bearbeitungsraum wäre für mich persönlich vielleicht etwas zu klein. 150mm wäre besser. Außerdem darf man ja nicht vergessen, das da auch noch ein 5-Achs-Schraubstock rauf muss. Würdest Du mir Deine 5-Achs-Erweiterung zeigen...? Vielleicht per Teamviewer oder mail.... LG aus HH Achim
It’s a spring loaded draw bar with ball bearings in the end that surround the pull stud on the tool holder. When released - moved in downward position - with the pneumatic cylinder, the ball bearings can move out of the way due to a bore with larger diameter in this position. You can see the draw bar in the video. Hopefully this helps a bit :)
@@joseantoniosolorzano4993 I used a few books as source of knowledge, especially for calculations. Those are in German though and I don’t have the exact name on hand right now - its been a while - like 4 years :) I have basically designed and calculated everything myself. I was just aware of the principle, because at the end you have to be able to manufacture it as well (this influences the design..). Try to figure out the principle and problems that can come up, like the ball bearings might fall out if the stud is not inserted.. . Based on knowledge of what you’re going to do with your mill, calculate the needed draw force -> friction torque of the tool holder cone e.g. bt30, needed stiffness, contact pressure of the ball bearings and the stud, fitting spindle bearings, lubrication system (oil or grease - speed and diameter dependent...).. There is quite a bit to take into account. I just got those information by continuously ready in random sources about it - over years actually. I built my first mill 6 years before I approached this one :)
![Gunna - HIM ALL ALONG [Official Visualizer]](http://i.ytimg.com/vi/HiCxoDeo0hc/mqdefault.jpg)
you're a mad man that's insanely good quality.
Thanks 😄
He means the YT video - the cnc is okey'ish for dyi.. 😜
@@TheStuartstardust Yes, I actually just built it to have content for the video .. 😄👍🏼
@@EngineeringSpareTime hahaha 😄,
Learn us to how to make it again. Where is the tutorisk?
For how small the machine is, it's capabilities are VERY impressive. Great work!
BURN THE WITCH!!! People say you need several tonnes of rotting American cast iron to cut steel, much less titanium. Despite what we just watched, it's impossible to cut steel on a desktop machine, everyone knows this.
Seriously great work! You've done a lot that isn't shown or discussed much around here, and produced great results. Parts within a few microns of nominal, or at least better than you can measure.
I would love to see more details on the pneumatic draw-in spindle mechanism. Also definitely would not be bored to hear about the design choices you made mounting the ballscrews and other motion components.
Awesome comment :D thank you - I appreciate it!
Yes, there was quite a bit of research and testing going into the design that’s not discussed in this video. Iterations I had to make, because I wasn’t pleased with the result…
At the moment it will be difficult for me to find the time to do an additional video about this machine, since I‘m working on different things I am going to share in a few weeks. Until I finished those I plan to do a more detailed video about the design and especially the ATC, since your not the only one that seems to be interested in this :)
Add one vote for your evolved thoughts on spindle design and construction. That's genuinely some green field territory on RUclips, especially a pneumatic design.
I'm planning to do something about it, since several people have already asked for it. You‘re right, not on RUclips.. :)
i'm actually impressed how the machine is rigid, he doesn't vibrate at all !
great work !
Thank you!
Waow! One of the smartest little cnc I have ever seen, love it. You've done a terrific study and your skills are impressive. You need to show us a detailled serie of vids about your cnc, from birth to achievement, please🙏🙏🙏
👌👍🖖
Thanks! At the beginning I didn‘t know how it‘s going to look like at the end, because intentionally I just planed to upgrade my former CNC ... this plan changed a bit. That‘s why I haven’t token any further videos, just pictures of the building process and a slide show is probably not this exciting...
@@EngineeringSpareTime bro can you share the cad file of this little monster?
please aka.vandalo@gmail.com (or well, just the spindle would help me a lot)
As a mechanical engineer i can attest that you are very talented. Amazing job!
Thank you :)
Thank you for sharing this beautiful CNC machine.
Congratulations on your work. I admire your work a lot because I have been building a similar project for 6 years. I have also built the atc spindle with many hours on the lathe and dedication. I do not have engineering studies, but for many years I have built small machines that have given me a lot of personal satisfaction. Socially I notice that there is a lot of misunderstanding of people with our concerns, they think it is stupid to make a spindle and spend a lot of hours on something that you can get for 550 dollars.
Congratulations on your talent.
Greetings from Barcelona
WOW... just WOW... what an amazing job you did here. When I saw you machining the spindle I was like: "Wait... he made his own spindle, air cilinder and automatic tool changer!?!?... amazing"
Keep up the excelent work.... and upload some more vids, please! :D
Thanks a lot! I still have some older projects I could share (mostly slide shows.. I mainly took pictures) and I‘m currently working on a 6 DOF robot arm, this will take some time to finish though :) I could release some “early stages“ of the build, if this is of interest..
@@EngineeringSpareTime you really should! I believe there are a lot of people who enjoy watching the process!
That first test cut was extremely impressive. Well done!
Thank you! This was probably close to the limit of the NEMA 17 steppers that I used back then :)
This is an exceptionally engineered mill all round. Few would even consider building their own spindles.
Seems extremely rigid for an 80kg machine too; that concrete must be ultra-high performance indeed.
Thank you 🙏🏼
That is just beautiful! And you made your own spindle! Any more info about making the individual parts or any new projects would be great if you can find the time. I've been trying to refurbish an older machine on weekends and after work for a couple of years now and know that it can take hours upon hours to do. And you can't really put a price on something like this that you clearly have lovingly designed and built with your own hands (and lathe). Any thing that you would like to share about this journey would be eagerly watched and rewatched.
Thank you, I appreciate it. I still have some older projects to show, which might be interesting as well as a current one. I‘m in the process of building a 6 axis robot arm from scratch (aluminium construction) including the driving system (servo driven) and programming. The mechanics of the first four axis are basically done. When I find the time, I‘ll make some videos in the next weeks.
I checked out your channel, looks like a really nice machine! Yes, such projects involve a big effort, but totally pay of in terms of learning and fun - in my opinion.
Very nice. Reminds me of the old days on CNCzone where people pushed the limits without relying on cheap modules from asia. Very nice.
Thanks - I appreciate it! CNCZone was great. It was actually part of the motivation to do this
It was great pleasure for me, to watch this video clip. I have read almost the whole discussions with your answers. It was very nice, to read your professional opinions, written with a lot of patience sometimes. I wish you many health primarily, many successes in your professional career, and private life also.
I’m glad to hear that you enjoyed it and appreciate your words :)
When I choose what I’m doing, being patience is natural - in my opinion.
Thank you, wish you the best too!
This blew my mind. Incredible work. Thank you for posting this.
Thank you!
Hands down the best DIY CNC mill I have seen, only Piotr's build is comparable in sexiness. Sounds super smooth cutting steel/titanium, leaves a pretty good surface finish, large work envelope for such a compact machine, well thought out way covers and even has proper closed loop control with servos. That spindle blew my mind. Awesome.
The video description answers most of my questions, but how much does it weigh? What controls are you running, LinuxCNC?
Thank you, I appreciate it! Yes, Piotr‘s machine is a nice one. There are some other really nice ones too.
It weighs about 80 to 90 kg - I haven’t weighed it in a while. I run an old version of Mach 3, cause I was used to it from a older project.
For the upcoming portal machine, I‘ll use LinuxCNC.
Nice machine! It's nice to look at this! The machine is a mirror reflecting the soul of its owner 😉
Thank you :)
Absolutely beautiful, stunning work! It is a maddening journey to build something like this at it warms the heart to see a finished one like this. I have been working about the same amount of time on my own build and the scope has creeped so far. A 300 pound Z axis is sitting on my workbench in the garage. It's happening...
Thanks a lot! Yes, I totally agree. It‘s way more work then you‘d expect before - so many small things to solve and to decide. But this is what makes it‘s so rewarding at the “end“. Just keep doing it!
I‘m also building a „“big“ one together with a friend of mine, for the last four years. We‘re getting there.. 😄
the best mini cnc i have ever seen!!!
Thanks :)
This is otherworldly quality! 😮
Wow! Very impressive. Much respect and admiration for this piece engineering feat!
Thank you 🙏🏼
Wow I hope you're on our side
Ich bin begeistert von Deiner Arbeit!!! Drei 👍👍👍 hoch. Ist natürlich kein Vergleich zu meiner DIY-Holzfräse. LG, Claus
Danke! Meine erste Fräsmaschine war auch aus Holz - es geht ja um die Begeisterung :)
@@EngineeringSpareTime Ja, so ist es....😄👍
What a beautiful piece of machinery - I'll need another 2 lifetimes before I can build something like that :)
Thank you!
A lot can be done - one way to find out is just trying :)
Unbelievably great job! When you made your own spindle i almost spill my coffee ;)
Thank you :)
Do you have the design for the spindle available for download anywhere? Impressive build!
This has been a huge inspiration
As most people have said that is incredible work! Thanks for sharing :)
Thanks! :)
Absolutely amazing! Well done. I have been considering something similar. I love how you executed everything. They turn into such big projects, don't they? Fantastic work.
Thank you! Yes, it‘s definitely a huge amount of work - totally worth it though:)
Nice machine!
Wonder what ratio the spindle has from the motor?
Maybe it is like 3:1 or 4:1. So max 24000 rpm from motor will give about max 6000 rpm on spindle? Was this the idea to get lower rpm? Could be that you wanted a tool changer and those can only run max 8000 rpm or something.
You said you used a 12 mm ball screw (the good one) and a SKF 7201 bearing. The bearing is 12 mm inside. Does that mean that you put the threads in the bearing directly? Maybe the ball screw was machined in the end but that would make me think that it would be more like 8 or 10 mm and different bearing was to be used?
What is the stiffeners made of?
Thank you!
The ratio is about 2.3:1 -> Max. 11 000 rpm. I did this to increase the torque at lower speed. Otherwise the torque would have been to small for milling high strength materials (e.g. carbon steel..) and the bearing lubrication of the main spindle is critical at higher speed with this diameter.. for the tool changer it’s not a problem, especially not if you build it yourself :-)
For the bearings: Good point! I machined an adapter and shrink fitted it on the machined end of the ball screw (it was 8mm OD) to achieve a proper shoulder for the bearing
Love this!! Im inspired to do something similar.
What linear rails are you using on the x, y and z? Looks like the Z is 20mm?
Also, how did you decide to do a separate spindle / motor?
Very Impressive! Love it, especially the ATC
Thank you!
Hello, I am curious to know which controller card you have used for mach3, I would also like to know if you consider the operation of macros in mach3 to control tool change reliable.
Greetings
Thanks for your comment. I am using an ESS SmoothStepper and additional break out boards for GPIO. The version I am using is most likely obsolete, since I have ordered back in 2015. Yes, I'm planningto use macros and a ModBus conntection to operate the ATC. Unfortunately, I couldn't find the time to fully utilize it yet..
Hi, amazing machine! I was very surprised by the rigidity of the components. Was the spindle head made up of aluminum pieces, or was it a steel construction?
Hi, thank you!
The spindle head is made of 6mm steel plates, all dimensions were cut with an angle grinder and than hand filed to precision :)
@@EngineeringSpareTime makes sense, thank you!
This is nice. Thanks for sharing
Impressive precision! Very good work, i am impressed.
Thank you!
C'est terrifiant... je vais rentrer chez moi ce soir et pleurer devant mon incompétence... non vraiment c'est magnifique😮
Wow! You are perfectionist!
The machine sounds great.
I assume you now have your degree by now. I am a CNC / Manual machinist for 45 yrs, worked in 17 shops, operated over 50 different cnc mills. From my experience with the engineers, the best ones have machining experience. You are off to a very successful career. That mill is sweet and you learned a lot. Try to incorporate manufacturing into your designs and make sure your boss knows how much $$ you saved them. Don't be bashful, toot your horn some.
I really appreciate your words and can totally relate! Making components yourself first gives you an understanding of what is important during development. Of course I need longer or even more attempts for the components I make, but in a professional context a much more productive level arises on which you can exchange ideas with the experts in the field - like you - and find a solution together. We can all learn from each other and that is, in my opinion, the fun of it all.
Thank you!
@@EngineeringSpareTime I agree, working together to solve problems is fun and the experience gained and shared keeps our world moving forward. I am Happy for you and your workmates, knowing your future will be rewarding.
You need to market something like this, or a machine company needs to pay you a ridiculous amount of money to design machines for them. Well done!
Awesome video. Nice machine. Well done
i just came across your channel amazing work 👏 i love to see plans our more in depth on how you made everything the atc was poor class 😁👌
I saw your comment on NYC CNC's Tormach Tech video and, thankfully, clicked. What a beautiful "DIY" build. (I quote DIY because I suspect there aren't many people - myself included - who would have the skill and patience to execute such a build.) Can I ask a few questions? 1) Now that you've had this machine up and running for a few months, is there anything major that you would have done differently in retrospect? 2) Is there a reason that the machine rapids for the ATC are that slow, or was this just filmed in the early days when you weren't totally confident in its operation? 3) You mention the Clearpath servos; I'm curious what you think about them?
Thank you! 1) For what its is I am quite happy how it turned out. I would have done a few things differently, would have designed things differently but for the time I was building the machine this is what I was able to do with my resources - knowledge, tools and budged.. For example: I would have liked to nitride the spindle shaft, use even more high quality bearings and linear rails (the spindle once and the ball screws are top quality..) and so on. 2) Yes, this was in the early stage and actually the first test of the ATC - so I started slowly (this was at about 300 mm/min, now it’s capable of 14m/min - I should make a video about it) :) 3) So far the clear path servos doing great. The implementation was straight forward, the performance is way more than enough (they actually run at 40% torque limit, otherwise they could rip everything apart). The tracking error and disturbance rejection is also good. They are more expensive (double the price compared to e.g. JMC), this is still cheap in comparison to a “actual“/ industrial grade servo drive (not the same “quality“ obviously).. For the next CNC I would order the free programmable version to be able to implement my own control algorithms to enable model based temperature compensations and stuff like this, its not really necessary though.
Just found your channel and subscribed. Very nice work. Nice mill
This is awsome! I'm building something similar. Would you like to make a little cash and make another one of those spindles? Trying to find one capable of 24k rpm and have neumatic atc is a pain. You seem to have it down.
Thank you! Unfortunately, at the moment I can’t build you another one, because I couldn’t offer it to a reasonable price.. With my small lathe it takes a lot of time to machine and to get it working perfectly. Thanks for you interest though! Maybe I’m able to produce them more efficient in the future - we will see :)
nice job... are you going to be offering plans and or cad models for anyone interested in building something like this?
Thanks! The build evolved over the time, so it‘s probably not the most efficient way to build it like this (e.g. more than 300 screws :D). That’s why I‘m not sure if someone would like to build it like this or should.. I‘d have to refine the plans and CAD for that to quite an extant. Due to my current projects and studies, I have to delay this.. But nice to hear that you would be interested in something like this, I’ll try to figure something out.
@@EngineeringSpareTime Many of us interesting in taking inspiration from your amazing build :)
What spindle are you using? I’m in the process of building a machine as well and can’t find a spindle with a low enough rpm and high enough torque to machine anything harder than aluminum.
The motor is a water cooled China 2,2 kW spindle, reduced by a belt drive -> max. spindle rpm is around 12000 rpm. The spindle cartridge with the tool changer is diy. For even higher torque I’ll upgrade the inverter to a vector driven one
@@EngineeringSpareTime Can you see how much power is actually being drawn by the spindle? i am currently upgrading a machine and have a 1.2kW DC motor to fit its max rpm is only 4200 so i was thinking of gearing for at least 8000.
Luc Davenport It’s possible to see check the power in the inverter ui, I didn’t check it though. How much power is actual needed, always depends on the cut you take. Lighter cut -> less power.. 1,2 kW should be enough for most operations up to a diameter of 6 mm.
If it is worth doing, it is worth overdoing.... Tolles Projekt! CNC-Grüße aus Remagen :-)
Overdoing - I don’t know what you‘re talking about :) Danke! Begeisterung übersteigt manchmal den Nutzen und da beginnt der Spaß! Ebenso, schöne Maschine und schicke Spindel ;)
Its the best build ive ever seen
Amazing work! Maybe you can explain a bit more about base. There is metal (I think aluminum) plates cast in concrete? Or by UHPC you mean something else? How did you machined these parts at home wit such great precision? I'm just hawing problems with smaller parts...
Wow. That's an incredible project. I'm wondering - how much it weighs? The steel milling capability looks very impresive for this size of machine. Love the design.
Thanks! It weights about 80 kg.
Amazing
Which CNC controller have you used?
Thanks! I used a SmoothStepper with expansion cards. I’m running it via Mach3
That was one hell of an impressive desk CNC mill, very well thought out, compact, and yet still super accurate from the looks of those measurements you took of your test cuts! If I may ask, about how many € did you spend on it without that toolchanger? Was the frame made out of steel, or aluminium? And what material were those black side panels made from?
Thank you! :) the overall build excluding the ATC the spindle motor and the servo system (those are exchangeable..) was about 1.2k - building it like this decreases the price, increases the involved work though.
This is good quality stuff...hope it's done in 6 months
So tiny... But so silent, powerful and accurate!
Top quality work. Subscribed!
Thank you, appreciate it!
Question. What signals do you run through the safety relay?
It’s triggered by the Emergency Stop Button with cross-circuit detection and a optional switch for e.g. an enclosure door. There is a 24V signal for e-stop that’s connected to the sps, a contractor for the spindle motor, a signal to the inverter and Servo drives. The servo encoders and the mcu are always powered. I hope this answers your question
Nice machine! can you give more information on the spindle cartridge build?
Thanks! Someone else already asked about this. I plan to do a video about this.
I would also be interested
awesome project!! this is my dream.. Building cnc machine
This is superb work! Thanks for sharing.
brother is it possible that you can share your project (info and cad files?)
Nice little unit. 👍🏻
Kool project All I need now is to buy a proper mill and lathe to make and I’m laughing...
Thanks! I “just“ had the lathe available, no milling machine was used. The lathe is the only actual tool I‘ve used. You could check if someone close to you lets you use their lathe ;)
At some point you need some turned parts. Building a machine like this without a lathe is nearly impossible - except you buy all the components finished...
Just wondering, do you have any drawings of the ATC spindle? i got all the tooling to make one of my own, been trying to design one myself but i keep getting stuck and confused. even more pics of the spindle would help!
Love the machine.
Could you please tell me what the depth of the machine is? Basically the length of the bottom on the side stiffening plate. I want to get a feel for the size of the machine.
Looks great. Brilliant work.
Thank you for your knowledge.
Did you use SKF 7201 in both ends or only one end?
In one end two of 7201 in O-arrangement. On the other end you want to use a “floating“ bearing that allows lateral movement to compensate for temperature elongation - e.g. a needle roller or a regular 6000, 6200..
You can also get of the shelf bearing blocks - easier to use if the implementation is possible.
The head is stationary and the table moves, interesting...did this reduce the complexity? great job overall!
Thanks! This layout has some advantages in terms of stability and stiffness, the effective working area is smaller compared to e.g. a portal though. It’s like a Industrial VMC
More typical for a 3 axis machine to be configured this way, great job man, I wish I had the resources and I'd make one too
Sehr schöne Maschine! Hut ab! :) auch die Genauigkeit ist einfach klasse! Wars schwer den UHPC Körper zu gießen? Woher hast du diesen bezogen? :) Und was für Motoren und für ne Steuerung verwendest du?
viele Grüße!
Danke dir! Das Gießen war nicht all zu schwierig - lässt sich mit der richtigen Vorbereitung gut verarbeiten. Ich habe den UHPC von moertelshop.com bezogen. Dieser wird dort „TEGNO“ genannt. Bei den Motoren handelt es sich um ClearPath Servo Motoren. Die Controller sind bei diesen direkt im Servo integriert. Ich habe zunächst Schrittmotoren verwendet. Als alles soweit funktioniert hat, habe ich mich dann dazu entschlossen die Servos zu kaufen (definitiv mit Abstand das teuerste an der ganzen Maschine (etwa 50%), das war es mir am Ende aber wert :) ). Diese sind ebenso durch Step/ Dir anzusteuern, was die Implementierung damals vereinfacht hat.. Ich konnte so meine Steuerkarte beibehalten. Als Steuerkarte verwende ich einen SmoothStepper mit BreakOut Board für die IOs.
Bezüglich der Genauigkeit, war das gezeigt natürlich auf den relativ kleinen Bearbeitungsbereich zurück zu früheren. Insgesamt spielt sich die Genauigkeit vereinfacht angenommen, mit entsprechenden Schnittparametern und Verfahrwegen, im Bereich eines Hundertstels ab - womit ich sehr zufrieden bin :) Wobei man nicht vergessen darf, dass Genauigkeit ein weit zu fassender Begriff ist.. Stichwort: „Maßverkörperung“
@@EngineeringSpareTime ok danke für die Infos! :) gibt es eine deutsche Bezugsquelle für die Clearpath Servos? Warum hast du nicht (wie viele anderen auch) die iHSV57 Servos genommen?
@@andysen1987 Gerne. Eine deutsche Bezugsquelle ist mir nicht bekannt. Ich habe meine direkt aus den USA bezogen. Die iHSV57 waren vor 2,5 Jahren, als ich die Servos gekauft habe, noch nicht all zu verbreitet und auf dem Stand. Zudem hat mir das Gesamtsystem der Clearpath besser gefallen: Passendes Netzteil, Encoder bleiben auch beim Notaus unter Spannung (Topologie Frage selbstredend..), Leistungsfähiger, AutoTune Fähigkeit mit vernünftiger Software, mit dem richtigen Stecker und Schaftdichtung eine vernünftige IP Klasse und vor allem es gibt einen Support. Der Preis ist allerdings der doppelte.. Die JMC haben sich in den letzten Jahren verbessert in Hinsicht auf Doku und Funktionalität, sodass man diese mit Sicherheit in einem Projekt gut verwenden kann. Der Preis von den JMC ist natürlich Top. Letztlich ist es wie so oft eine Einstellungssache :) Ich hätte auch welche von Siemens genommen wenn der Faktor 4 (min.) nicht wäre :D
Übrigens verwendet Tormach ClearPath Servos in ihrer X Serie, das hat sich auch in diesesem Zeitraum erst aufgetan.
@@EngineeringSpareTime haha ja ok das sind alles argumente :)
Dam dude, ben watching a few of your vids and I love your builds. Would love to see an explanation of the auto tool changer, excellent work!
Thank you for sharing. What kind of Lathe is that?
Thanks! It’s a nice one: Wabeco D6000 :)
Engineering Spare Time ah. Yes indeed a nice one!
Really cool!! I intende to build one like this, that I can use to automatically mill blades from old files (keeping the original heat treatment, no annealing), just a bit more X travel but the rest is great. Could you help me or send me links to papers or videos that might help?
What are the side stiffeners made from? Why did you cut slots in them? Seems weight saving isn’t useful here?
They are made from S355 construction steel - laser plates.. The idea of the cut outs is to reduce surface deformation in X direction due to vibrations close to the eigenfrequencies (changing the vibration modes...), this shape is still stiff in Y and Z direction though. And it looks way cooler like this ;)
@@EngineeringSpareTime how did you go about evaluating eigen frequencies and whether they would be significant?
@@ewildgoose I just roughly calculated the nominal frequencies of the spindle motor, spindle shaft and according cutting frequencies. Some of the spectrum equals the vibration mode of the plate without the cut outs, so I decided to add them. If this was necessary is questionable, the plates are not vibrating or ringing though..
u my friend are a GOD
Looks legit. Great work!
What kind of benchtop lathe do you have? The machining looks really good!
It’s a Wabeco D6000
Looks great, have you anything you can share in the spindle design?
This is awesome work, we have been trying to find an ATC spindle for a long while. Please share the BOM for the build. Thank you.
Thank you! The bom is kinda short:
- disc springs
- 7007 and 7006 from NSK -> spindle bearings
- 3.5mm ball bearings
The rest is custom and made from stock material :)
Thats cool, but what about collects? The spindle interface for the collects is what makes ATC spindles difficult to build.
Could have a optical sensor just above the tool sensor. That way it could go faster down and slow when optical sensor is triggered. The optical sensor could be a part of the whole height sensor.
That’s a good idea 👍🏼 I could also move faster, hit the trigger ones, retract and repeat it with less speed - not that save though :)
How do you build a CNC machine? Is there a degree or a course for learning how to build machines?
It`s a combination of practice and theory. A degree in mechanical engineering or/ and an apprenticeship in metal craft definitely helps - it’s not needed though. Everything can be achieved just with a good amount off passion. Start small, keep working/ learning and everything will come together over the time :) I started building my first mini milling machine 6 years before I approached this one and I didn’t had a degree at this point or any tools that were needed. I just used books, forums, basically everything I was able to find as a source of knowledge..
Awesome build! Do you have any info on the linear rails & ballscrews used? Sizes, preload etc. Thanks!
Thanks! I kinda used the “best“ stuff which I was able to get and not 100% what I would have liked to use (due to cost). But anyway: The Linear rails X and Y: HIWIN MGWR09 + carriage WGW09HZ1HM (sounds small, C_0 is 5.9 kN though..). For the Z axis: HIWIN MGN15HZ1HM. Both types with light preload (Z1). For the ball screws - I was lucky - I could get my hands on some ground 12mm P5 ball screws from STAR (Rexroth) check the video 10:43 .. normally those would have cost more then the rest of the machine (without the servos and spindle motor). For the ball screw bearing arrangement, I used precision spindle bearings from SKF 7201 (good bearing are important! Everything else is not worth the time..)
@@EngineeringSpareTime Thanks for the quick reply! Yes very impressive. It's amazing how much performance you can get from relatively "light weight" linear motion components. I see a lot of over-built machines that don't perform that well.
Any chance you have more info on that home built spindle cartridge? Even a video with some pictures and dimensions. I know a lot of us would be very grateful, as it's a bit of a stumbling block (for me anyways). Cheers!
Devin Moodley At the moment I‘m building a big CNC Machine, that is not light weight anymore - I could built this machine with the new one so much more efficient :) This small bench top machine is very practical in a sense of space, weight, speed and capability (it’s quite precise..) though. The working area in X, Y, Z is enough for most of the stuff you do.
I didn’t take to many pictures of the spindle, cause it took for ever to machine it with this small lathe and I forgot about it. I have to think about this, it was definitely no straight forward to build the spindle cartridge completely from scratch (incl. the pneum. cylinder), I learned a lot by doing this, and would do it a bit differently next time - I might not be happy with releasing/ showing this “80% spindle design“
@@EngineeringSpareTime I'd love to see a video discussing what you would have done differently with the spindle. There are so many "My First Cnc Router!" videos out there and not nearly enough about precise and rigid machines like this!
BuySomeApplez If there is interest in this, I‘ll think about making a video about the thought process and construction of such a spindle cartridge.
“My first CNC router“ is a nice way to say it - “Machining metals“ has sometimes different meanings :)
Yeah, there are really just a view - mostly bigger machines. This was actually part of the motivation of making a a video about my machine..
That is awesome mate ! Do you think there is a way to grab the tool without pneumatics ? As If you intend to use the mill without a compressor.
Thank you! Yes, this would be possible for example with a electric motor and a short lead screw or some sort of mechanism that gives mechanical advantage. Downside of this would be the size and cost, since such a mechanism would be larger and more expensive then a single pneumatic cylinder - sure you need a compressor, that doesn’t need to be huge though and most of the time one is already used for cooling
As you meantion it there are these small type of car tire inflators that could get a pressure up to 10 bars(100psi?) and you already have them at home. They are small but maybe they are just enough to suck the cylinder If used as a compressor.
Awesome build!
GREAT MACHINE !!!!!!!
Thanks!
Impressive work
Thanks 🙏🏼
How much NM(newton force) / Kw of a spindle power as minimum required for steel milling process ?
This mainly depends on the tools being used. To estimate/calculate the cutting forces you might want to check out the formula from Viktor/Kienzle
Dude. What in the world. How…how are you doing that stuff in your spare time. I’m over here working on how to design a robotic arm for months now and not getting anywhere.
Haha, thanks. I've literally been doing this my whole life and all the time - all in all, that's a lot of spare time :-)
Your experience will influence your approach, decisions and confidence in each project, thus you “just” have to start, try, fail, redo and you’ll get somewhere with it. If you are trying to build a robot, build it the way you are confident with it, add 30% uncertainty and go. Trying to build what other people build is not really an approach I’d take - as inspiration for sure
@@EngineeringSpareTime thank you man. Good luck with your spare time😂
What type and size of linear rails are you using?
X and Y are MGWR09, Z is MGN15HZ1HM
@@EngineeringSpareTime thank you. Are they rigid enough?
@@john1987742 This is what I was able to get at the time - I would have otherwise used a size larger. In retrospect I can’t complain about them.. they might not be this long lasting, we will see though. And according the rigidity, the video might give an impression of it.
Appreciate your work 👍🏾
Can you help me about servo motors and drivers ?
Awesome feat!
nice work, how much is the total cost ?
Thanks! About 1.5k without the servo system..
Woher hast du die Maße für die Spindel?
Ich habe alles selber entwickelt/konstruiert :)
I would love to learn more about this machines design.
Hallo,
interessantes Projekt was Du da gemacht hast...
Ich baue auch gerade eine 3-Achs CNC mit UHPC (Mörtelshop).
Mein großes Ziel wäre eine Erweiterung auf 4/5-Achse.
Ich habe bisher noch KEIN Hobby/Privat-Projekt gesehen was das gut kann.
Mir würde auch schon 3+2 "reichen".
Industrielle Lösungen sind i.d.R. viel zu teuer.
Von SKCNC gibt es zwei Dreh/Schwenktische; weit über 10k €.
Dazu eine Industrie BECKHOFF-Steuerung auch für weit über 10k.
Mit LINUX-CNC soll das auch möglich sein....????
LG aus HH
Hallo und danke! Ja, da ist was dran. Viel gibt es zu dem Thema nicht.
Ich habe bereits eine 5-Achs-Erweiterung mit einem Bearbeitungsraum von 100mm (im Würfel) konstruiert. Ich muss nur noch die Zeit finden die erste Einheit zu bauen und zu testen. Außerdem plane ich an einem Bau einer kleinen möglichst erschwinglichen integrierten 5-Achs-Maschine (die ganze Maschine sollte deutlich unter 10k liegen..) - das wird sich allerdings noch etwas ziehen..
Möglich ist der Bau auf jeden Fall auch die Implementierung mit Linux CNC wird funktionieren.
Soweit ich weiß arbeiten Alex CNC und talla83 schon länger an einer 5-Achs-Erweiterung. Diese wird mit Sicherheit mit Linux gesteuert.
Welchen Bearbeitungsraum sollte eine 5-Achs-Erweiterung bzw. kleine Maschine deiner Meinung nach haben?
@@EngineeringSpareTime
Hallo,
das 5-Achs-Projekt von Alex und Peter habe ich gesehen.
Ich glaube, da kommt aber nichts mehr...?
Alex baut jetzt ja an seiner großen Fräse.
Ein sehr großes Problem sind auch die HARMONIC Drive Getriebe >> teuer, schwer zu beschaffen.
Aber, ich habe gesehen Du beschäftigst dich auch mit Getrieben.
Ich selbst mache Rotorköpfe für Modellhubschrauber. Dafür wäre ein 5-Achs-System schon super !
100mm Bearbeitungsraum wäre für mich persönlich vielleicht etwas zu klein. 150mm wäre besser.
Außerdem darf man ja nicht vergessen, das da auch noch ein 5-Achs-Schraubstock rauf muss.
Würdest Du mir Deine 5-Achs-Erweiterung zeigen...?
Vielleicht per Teamviewer oder mail....
LG aus HH
Achim
That is an awesome machine! Do want
I'm curious about your spindle setup, how's the ATC handled?
It’s a spring loaded draw bar with ball bearings in the end that surround the pull stud on the tool holder. When released - moved in downward position - with the pneumatic cylinder, the ball bearings can move out of the way due to a bore with larger diameter in this position. You can see the draw bar in the video. Hopefully this helps a bit :)
@@EngineeringSpareTime Awesome thanks!, do you know any (formal if possible) source where I can deepen about it? thanks again.
@@joseantoniosolorzano4993 I used a few books as source of knowledge, especially for calculations. Those are in German though and I don’t have the exact name on hand right now - its been a while - like 4 years :) I have basically designed and calculated everything myself. I was just aware of the principle, because at the end you have to be able to manufacture it as well (this influences the design..). Try to figure out the principle and problems that can come up, like the ball bearings might fall out if the stud is not inserted.. . Based on knowledge of what you’re going to do with your mill, calculate the needed draw force -> friction torque of the tool holder cone e.g. bt30, needed stiffness, contact pressure of the ball bearings and the stud, fitting spindle bearings, lubrication system (oil or grease - speed and diameter dependent...)..
There is quite a bit to take into account. I just got those information by continuously ready in random sources about it - over years actually. I built my first mill 6 years before I approached this one :)
Mind blown! Wow.
awesome! how much did the whole thing cost you ?
Thanks! Without the servo system and spindle motor about 1,5k. Most of the components are from industry sales..
@@EngineeringSpareTime thanks, so that makes it affordable!
Добрый день ! не могли ли Вы поделится чертежами самого шпиндельного узла. спасибо!