Pro-Grade Assembly Part Two (System Completed)
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- Опубликовано: 5 окт 2024
- This is a build overview of a pro-grade system build I'm doing for a client. This will be a two part series. This second part reflects the system being completed, with explanation of the system's details to help answer many questions I receive.
Here's a link to this system in my store. Keep in mind this kit includes all required software as well for a turnkey package including UC-100 USB motion controller. www.ebay.com/i...
If you have questions, or require a quote please message me at Storm2313@gmail.com, or my eBay store eDealers Direct here www.ebay.com/s...
Thats a work of art Vince.... man is that pretty...lol such attention to detail is so nice to see
Chris, thank you as always for your support. I really appreciate it. I build each as if it were my own :) Thank you,
Vince
Just wow! this just looks amazing 😍 Makes me regret the ABS cabinet i have
Thank you for your support, and kind words. I really appreciate it! Vince
Super solid system . I have abandoned all my cnc projects and hobbies, it sucks . But i got into Auto cross and track events - working on the car . Next year I'll use this as a guide to build my cnc system . Hope the business is well hope you get more clients . As always awesome work top notch professional.
Rafa, thank you for your support as always. I really appreciate it. Have a great weekend! Vince
Very well executed. Your technical knowledge and craftsmanship is impressive.
Brandon, Thank you for your support, and kind words. Have a great weekend! Vince
I can't agree more with your statement with using ring connectors and solder.. I've been an electrician for 21 years and build my own CNC machines..... I would say 99% of every electrical/control issue i see primarily resulted from improper connections/ bonding and grounding.
@@beckyschwantes5287 Yes. Properly sized and crimped connectors are reliable in certain environments. Example, in junction boxes shielded from the elements. Contamination, oxidation and cable wicking are where the problems start within mechanical connections. Anti-oxidants can be used and some connectors come with it within the connector. So soldering a connection simply eliminates the possibility for internal degredation and high resistance.
Very nice and clean layout, Vince! You thought of everything - schematics readily available. Ferrite beads on everything. Clean wire layout. Wires properly restrained. Definitely the proper way to have a common ground and eliminate ground plane problems. Do you crimp ferrules on the ends of your wires? Solder the ends (with or without the ferrules)?
Thank you again Joe, for your support. I tin each lead for terminal blocks on my pro systems as I'm more comfortable with soldering. Thank you, and have a great weekend!
Vince
Looks very nice! I am a bit worried about the e-stop not having a separate circuit. Looks like it is only connected to the BoB.
Thomas, thank you for your support. The E-stop is only connected to the break out board as best practice as it disables the system without cutting power. If you wanted to integrate a power cut for the system it should always be done on a segregated circuit. Thank you,
Vince
Just checking out how other people do it.. have a question. If you're grounding the cabinet to the main grounding bus bar why not just pinch the cable shielding in the GX16 connectors at the cabinet side? (Assuming your GX16 connectors are electrically connected to the cabinet, of course)
Of course I'm not building cabinets for people, just myself. If it's all the same I would say that your method is cleaner and really communicates to the customer the intent.
Technically speaking, why couldn't you use the entire cabinet case as the ground and then ground the cabinet? Would save on wire. I understand the concept of a ground loop but I can't wrap my head around why this would create a ground loop if that's what we're trying to avoid. The aluminum case with a large low resistance connection to the Earth in my mind would be the path of least resistance for sure. Your thoughts?
This is how I did it with a 2.2 kW spindle and I don't have any issues but that doesn't mean it's a good practice.
Also, why didn't you use larger fans if you can afford the space? Those little ones are loud as hell. I also chose to put redundant 140 mm fans in mine so that it is over cooled but has redundancy built-in and no need for thermal shut down
Hey Brian, thank you for your support. The enclosure is grounded through conduction from the power supplies. The Ground buss is used to allow all components shield drains to be properly grounded. The GX-16 utilizes solder connections. You never under best practice should be using crimp connections as they create electrical resistance with precision electronics.
Thank you, and have a great Labor Day weekend!
Vince
Suppose the cable shielding was soldered to the GX16 connector for the sake of the question. In reality there are a lot of connections inside of our box that aren't soldered. Everywhere a screw presses a wire against a piece of metal such as your bus bars are by that logic inferior. We make these compromises for convenience. It's really splitting hairs anyway as the resistance is almost immeasurable.
Could this in any way create a ground loop that I can't wrap my head around if instead of a grounding bus bar you just grounded all of the components to the cabinet and then the cabinet to the ground. I edited my previous comment but not fast enough so you might want to check that out. Thank you for your way too fast reply 🤠
Again, I am not challenging the way you assemble your boxes as I think it is a superior way of doing it. For instance, if my GX16 threaded connector came loose I would lose grounding of that shielding and noise would creep into my system with no way of quickly being able to diagnose where it came from. I just am curious if you have some knowledge you could bestow on me that I haven't yet realized.
Soldering is "best practice" on electrical connections that are assembled to complete a CNC controller. Feel free to do as you like with your system.
In best practice a ground buss is used to allow a "Star point" grounding solution. Grounding using the method you discuss will work, as all components will be grounded to the same point.
Thank you, and have a great Labor Day weekend!
Vince
Excellent workmanship that I recognise as I have been wiring and/or designing electronic equipment all my life from power station switchboards to mine truck simulators.
I have a couple of questions;
I am rewiring my mill, that I built, with a new motion controller and new drives, all placed in a steel box. I intend to go to mach4 and get away from grbl.
I have experience a lot of problems since I fitted the VFD and spindle with tripping alarms (possibly the limit switches.
Everything is shielded though I possibly have earth loops.
1. Is it safe and advisable to put the VFD (3 phase 220v 1.5kW) in the same box with maybe a metal shield around it?
2. can I run a single earth wire to the machine chassis and then ground the motors and spindle shields to the chassis rather than run the the shields thru connectors to the box?
Thanks for your time and keep up the good work.
Graham,
Thank you fro your support, and kind words. Their greatly appreciated. The answer to your first question is a VFD in best practice should always be mounted outside of your motion controllers enclosure to assure no EMI penetration. The answer to your second question is your fine mounting a ground buss to your CNC chassis, and running all your motor's shield drains to it, but I do caution you as all the machining debris will get all over it which over time may cause issues.
if your experiencing "ghosting" of signals then the first question I have regarding the VFD, and spindle is are you using 16/4 double shielded cable? If your not then I highly recommend starting with installing this component as it should correct the issue. www.ebay.com/itm/131899174942
Thank you,
Vince
@@corvetteguy50 Advice noted, thanks Vince.
Thank you again, Vince
Hi Vince, excellent work. Neat as hell!! I was wondering how grounding work with chassis? Is it only the power supply conducting to chassis or should one make an extra connection from common ground to chassis? Or do you measure it and if not low enough resistance then add an extra ground wire to the chassis?
Hey Gerhard, thank you for your support. Typically the power supply as a conductor would easily produce a chassis ground reading of 0. If its not you can certainly add a segregated ground buss for the chassis. If the Ohm reading is at least 3 or under your golden. Thank you again for the kind words.
Vince
Thanks Very much you are proffesional
Richard,
Thank you for your support, and kind words. I really appreciate it. Have a great weekend! Vince
Hi Vince....trying to grasp the star ground system concept implemented into all of your designs. All grounds feed back to a central location and out to earth but they also seem to be isolated from the chassis with the use of insulated standoffs...or maybe not. If so, how then does the metal chassis itself interact or enter into the overall picture of a star ground system or is it simply isolated purposely....groundloops? Thanks!
The chassis is fully conductive, and the terminal block for the ground in the video is connected directly to the GX-16 third pin, and then split to the 72v, and dual rail 48v power supplies for their grounding to prevent "Daisy Chaining". The 48v 5v power supplies base is grounded from conduction after its ground terminal is connected. The unit's base is then mounted to the chassis making contact with it grounding it as well. Thank you,
Vince
@@corvetteguy50 Ok, great.....thanks for clearing that up.....I was obviously confused. Yay!
@@Cleatus46 No worries its a bunch to digest, but the more you get your hands on it it will all make sense. Thank you,
Vince
Hi Vince, I’m doing my first CNC and your videos are such an inspiration.
What are the black parts on each side of a cable that goes from the controller to BOB (at 4:30)? All cables have that...
Are those ferrites covered with a heat-shrink tube? If yes, the reason is due to silicon cable not being shielded by default?
What size of silicon wires are you using in your installations 0.5,0.75, 1.0mm2 ?
Thank you for all the effort, you are putting into your videos.
Best regards from Slovenia.
Kristijan, Thank you for your support. I really appreciate it. Yes the black areas on the cables are ferrites that are covered in heatshrink to lock them into position. The gauge wire to use is based on your particular drives amp requirement. I used 18awg silicone wire for the G203v drives. Thank you, Vince
Thank you for reply .... if 18awg is something you use inside the controll box, what about outside for steppers and limit switches .... the same ? I have seen there are many ferrits with different Ohm and frequency ... is this something I should pay attantion to or ? Thank you very much.
The stepper motors use 18/4 lead double shielded motor cables, and the switches will use 22/2 double shielded cables depending on their requirement. Thank you,
Vince
Hi Vince, is there any reason you prefer the 48V coil relays as opposed to 12V or 24V? I understand the 48V also powers the fans but there are plenty of good 12 and 24 volt fans. Is there something driving the decision that I don't see?
La Vita Nova, thank you for your support. I really appreciate it. The reason I use a 48v relay in my G540 systems is, so one power supply powers every component from the fan to the relays should the client require them. you can use whatever voltage fans, and relays you prefer, but you'll require an additional power supply rated fro them to be installed in the electronics enclosure which creates more EMI. Thank you, and have a great weekend. Vince
@@corvetteguy50 Thanks for the quick reply Vince. BTW I think your build quality is impeccable, You have some of the best wiring practices I've seen on any CNC post. Thanks again.
@@bventrig Thank you for the kind words. I really appreciate it....:) Have a great weekend, and please be safe. Vince
Hi Vince, ok....in one of your videos - How to Shield Unshielded Wires/Cables for your CNC, it shows construction of a four wire, ungrounded motor cable. I think in another one of your videos, you state the motor doesn't really need a ground connection because it is already grounded....I could be wrong. In this video, you have a five wire cable, one is a ground drain......so, there must be a ground drain connection on the motor end of the motor cable, right....or not? :-)
The ground drain is always attached to the electronics enclosure with the drives. The motors are always grounded in best practice when mounted to your chassis when you ground it as the motors, and chassis are both metal which means through conduction you have the system grounded, Thank you, Vince
Vince, you might want to increase the volume a bit, or move the microphone.
Hey Karl, Your right Ill adjust it on future videos.
Thank you, and have a great weekend!
Vince
Vince, do you share the same DC common for both PSUs or they are separated? If they are shared, are the linked by a wire placed somewhere?
Thanks
JP, The
DC common isn't shared between the power supplies. Only the grounds are as V- is considered common, and not the same thing. Thank you,
Vince
All copper wire?
Hey Mick, thank you for your support. Yes the system uses all copper wire in both standard, and silicone casings. Thank you,
Vince
Hi Vince, I see a ground wire to your power supply. Does the power supply pass the earth to your housing? or the power supply is mounted on plastic?
Erikkoenders1, thank you for your support. The power supplies, base, and chassis provide continuity to the ground, and conduction completes the grounding process when mounted to my chassis. This is imperative for a grounded enclosure required for EMI protection. Thank you,
Vince
@@corvetteguy50 thanks for your quick message, currently i'm building my control box for my own cnc and your video is 1 of the examples i'm using.
You bet..You bet :) Thank you again for your support. Vince
what does this system cost.
Ursula, Thank you for your support. Please contact me through my email to discuss your system as you may not need a Raptor system. My email is Storm2313@gmail.com Thank you, and have a great weekend!
Vince
Contact info?
Hey Jim, thank you for your support. My contact information is listed below in the description under the video. Thank you,
Vince