Learning FreeCAD For Beginners 41 : Screw Top Container | 3D Printing and Modelling | Threaded Lid
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- Опубликовано: 28 сен 2024
- Learn how to create and 3D print in FreeCAD a simple container with a thread screw top lid using a compound workflow in the part workbench. Design the model all in one FreeCAD sketch and revolve and build the thread using simple workflow that is easy on the beginner.
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I did not know that you could explode a sketch. I would have had four different sketches wiht copied geometry all over the place to accomplish what you just did with one sketch. This tutorial has saved me so much future hassle and really opened my eyes.
Great to hear. Glad this could change things for you.
Same here, I didn't know about exploring a sketch, brilliant. I love watching these videos, there's always a new thing to learn 👏
Excellent tutorial with perfect way of explaining the steps. I used your helix approach to create a special thread I need for a project. I got a big problem with a severe twisting of the thread, increasing along the path of the helix. I implemented your thread example and discovered that your design has exactly the same issue. You easily see it if you increase your height of the helix to several turns. After searching the web I found the solution: when you sweep along a HELIX, you HAVE to select FRENET in the sweep popup. I noticed that you had this option unselected in your example.
Thank you glad you enjoyed. Thank you for adding your experience as it helps others who read the comments. Frenet is great when you have large helix as it stops the profile from beginning to disorient itself from the path (creep) worth mine I didn't need it, probably because of the size or shorter length of helix. I didn't think about talking about frenet so sorry I missed that.
Thanks I was wondering what that option did. Sharing helps us all progress.
Thanks @eagletracker for this information! Thanks to @MangoJellySolutions for the very helpful video as well!
Thanks so much for this great tutorial. I found it to be life changing. It was worth the time I spent here. Thanks so much for your hard work.
You're very welcome! 😊👍👍
Thanks!
Thank you so much :)
Thank you for another great tutorial! I'm excited about being able to use multiple profiles from a single sketch, similar to how I did it in SolidWorks. I spent hours trying to make smoother transitions at the ends of the spiral. I was able to make a perfectly smooth transition on the sweep path, using Blend Curves, but the sweep still has a bump at the outer edge, because of the change in radius.
Very useful content. Thank you!
I spent long hours trying to figure out how to make customs threads, mostly for 3D printing and overcome the need for supoorts. I also watched many videos, with just a few of them being actually helpful, but somewhat complicated to make. After that, I kind of figure out a way that works with almost any thread shape.
If you could make a video of it, probably many people would be grateful for it.
Everything is done within a body in Part design workbench.
1. Create the core cylinder.
Ex. 10mm radius, starting at 0mm in Z.
2. Create the thread profile.
It must start at the base of the cylinder (no under it).
Ex. start at 10mm in X, 0mm in Z, and 4mm thread height.
3. Create an Additive helix.
Mode: Pitch-Turns-Angle or Height-Turns-Angle.
Turns: 1. If it's more than 1, it will fail because it touches itself.
Pitch/Height (minimum): Thread height + 1/1000. It must be just be slightly higher than the Thread height.
Ex. Pitch/Height: 4.0001
4. Create a Linear pattern.
That will give you the rest of the the turns.
If you want to make it slightly easier, on the Length you can put:
(Occurrences - 1) * AdditiveHelix.Height
And control it with the occurrences.
5. Create a Groove.
This is where you trim the excess thread and you can also apply a chamfer to the tip of the thread.
I usually started the threads under the cylinder because I don't like the flat face at the beginning of it, but it gave me some errors with some tangents at the cilinder side, that's why this step and the warning in #2.
6. Test the body Geometry.
Go to Part workbench, select the Thread body, go to the Part menu (at the top), then Check Geometry (towards the middle of the drop down menu), then Run check.
I did it so many times, that it was easier to run the code from the Python console. Gui.runCommand('Part_CheckGeometry',0)
I love this tutorial, at 75 and relatively new to FreeCAD, I can not remember all the steps, so when I need to create threaded objects I re-watch it and follow the steps as I go. It has been a lifesaver. Thank you for all your great tutorials and tips.
Lovely to hear that it's in your tool kit as reference and you keep coming back to it. If I can make all my videos like that I be a very happy man 😊. Thank you for taking the time to write that comment. Great to hear.
Nice video! A suggestion -- I noticed that your Sketcher toolbar icons aren't all visible at once, which requires you to use the extend-toolbar icon to get to the angle constraint located on a separate list, meaning extra actions for each use.
The remedy is to reduce the size of the toolbar icons. Edit ... Preferences ... General ... Size of Toolbar Icons ... change from 32px -> 24px. Problem solved.
I hope this helps. Again, nice video.
Thanks, glad you enjoyed the video. The sketch icons are on purpose that big to make it easier on viewers to see what has been selected
@@MangoJellySolutions Yes, that thought crossed my mind before I posted, but for viewers who rely on specific actions in the user interface, smaller icons and fewer steps might provide an easier narrative to follow.
Anyway, it's a good video, well worth watching.
Do you have a link to the stls? Very good tutorial, threads have always intrigued me so it was very interesting.
Ugg! I got to explode compound and it only gives me .0 .1 and .2
How do I get the lid and container to explode? I get
Container/lid, bottom thread, and top thread
So first of: THANK YOU. I have been binge watching your tutorials and it helped me so much. I can't express that enough.
However this time I have a question: I somehow started your tutorial of on a different plane (XZ), so everytime I attach a sketch to the end of the helix it turned. Which is no problem, just turn it along its attachement. But what happens when I try to merge the curves, they don't mere for some reason. I get three different curves and for that reason the sweep doesn't work properly. Do you have any ideas? ^^
Sorry for the late reply. If you start on a different plane then use the same attachment mode and draw a quick arc attached starting at the centre. Then go back into the map mode and select the reference 2 button and click the helix. You will get some attachment options of Frenet which is a curve attachment mode. Try one of the 3 and you should be in a better position.
Glad your enjoying the videos and they are helping 😊
Great vid. Thank you. Took me a while to understand the lead in/out. To get the helix to be tangential to the axis, you need to set the height of the helix to be increments of 1/4 of the pitch so that you can align conveniently to the x or y axis.
Nice. It is frustrating that many operation in FreeCAD inexplicably fail.
This might be my favourite lesson so far! It’s like learning a magic trick.
Thank you for this excellent video. I followed the instructions in the video with the exact dimensions and slightly modified dimensions. I want to use this approach for future object with different dimensions. I'm wondering, would it be possible to have the dimensions of the new container parametrized in a spreadsheet and make it more customizable? Should in this case "all' constraints be defined in the spreadsheet (including helix properties, etc)? Thanks for answering.
Glad you enjoyed the video. Yes that is totally possible. Some of the dimensions you could derive from formula in the sketch itself if you don't want everything in the spreadsheet. This would probably be ones like percentage increased if you wanted thicker walls for larger containers or turns on the helix depending on height of lip. The height of the lid could even be a percentage of the body. Personally if you have it all in the spreadsheet then your design intent is all in one place so easier to follow. In my collection you will find a video for 'Config tables' if you want to take your spreadsheet to the next level and control the individual sets of configs by a drop down selection.
*23:48** I always see you taking time to click these objects, are you doing that for clarity? I'm coming from programs that let you window what you want to select. And moreso, window in one direction selects everything within the window and crossing, and the other direction, only those within the window.*
Yes exactly that, I have used the box select before and people can get a bit lost as there are two versions. In sketcher you can box select from top left to bottom right, any geometry that is "fully" within the window will be selected but if you select from bottom right to top left then any geometry the window "touches" will be selected. The box selection outside of sketcher is initiated by a shortcut key and again they're are two types. There are also mouse shortcuts like double clicking to select the master object. So single click to pick the face, double click to pick the whole body. I try to keep away from including too many shortcuts as it can be confusing for new comers. But, you have now made me think with tutorials like this one, they are more for viewers who have some knowledge under their belt so I am tempted to start including those sort of things.
@@MangoJellySolutions Ok, whew... I wasn't even going to bother with FreeCAD if I had to point select everything, lol 😛
Can anyone let me know if this design is parametric? After you explode the sketch, and place the thread position by dragging, can you later adjust the dimensions of the base or lid (height , thickness, etc) and will everything align?
With the exploded it is parametric so you can change the dimensions and update the sketch with additions as long as you keep the same number of profiles i. e if the sketch is made up two cross sections, the lid and the container, if you decide to make say a third cross section, say something for the container to sit in then it wouldn't appear in the list.
These are the best instructions I've seen. No nonsense or sidetalk. Thank you so much.😍
You're welcome, Glad they have been able to help people like yourself get to grips with Freecad.
Is it possible to make a full tutorial video on thread profile workbench and curved shape workbench. I just don't have time to do the research and figure out how those bottoms work. Lol 😂
I certainly will do :)
Thanks for the tutorial; I've learnt a lot. One tweak I'd add though: I had all sorts of fun trying to get the threads to boolean connect with the body. Eventually I almost accidentally went back to the Compound command you used to split the sketch, and used " make compound " to unite the components together. That seems to work without a hitch where the boolean operation consistently fails.
I may be a result of the version I'm using - I'm on Mint Debian Edition so the installed version is 0.20.2. (I'm too lazy to want to update weekly...).
For me this is the best tutorial yet! The screw lid is a complicated process but you made to look easy by following the steps. I am now a convert to compound sketches too - what a time saver! Thank you.
Glad it's helped. Yes it's a nice simple workflow. It's a shame you have to make sub shape binders to them to get them into a part design workflow
Yep, they appear to be a very powerful tool.
This is a great tutorial. Well done. You know what you are doing and, more importantly, you present it in a way that even a novice like myself can understand.
One question though. Right around the 16:35 to 16:38 mark it appears both the LidThreadProfile and ContainerThreadProfile were moved up. Is this correct?
Many great pointers in this one! I've gravitated towards the part design workbench for some reason but i see some really useful tools in the part wb here. Thanks again , i love freecad its amazingly versatile. How did you learn all the parts of it? do you know all of it? amazing tutorial Thank you as always :)
You can use this workflow with part design if you wanted to by creating the sketch and then the explode compound using Part tools but then using sub shape binders to pull into your part design workflow. You will need to creat additional bodies which create the additional steps. Regarding the knowledge well it basically started by trying to figure out what I used to do in the software I used before freecad.. I did a lot of exploring, experimenting and researching during the early days. Even looking at the code to figure out what the tools were doing under the hood. There wasn't much documentation during that time so I did a lot of asking and researching.
@@MangoJellySolutions I was impressed with the explode! I've a lot to learn but it's starting to click together using freecad, the beginner series has paved the way for me. Brilliant. Would be interesting to hear more about things pre freecad.
At 31:25 Darren says to delete the Connect. If I do, I get an error message: 'The following referencing objects might break. Are you sure you want to continue? JoinCurve.' JoinCurve shows an exclamation mark - 'List Index out of range' and there's no way forward for me.
If I back off and leave the Connect, the Helix isn't released.
BTW, the Connect shows as a cube icon at this point rather than a T-on-its-side,
I worked around this by saving the completed lid, then back-tracking to 19:50 and working on the container.
Can anyone shed any light on what went wrong?
FreeCAD v. 0.20.2 AppImage / Linux Mint
I have done this tutorial twice. The first time, the cover came out all right, but the container had a lot of crazy things happen. Sometimes when creating the curve from the helix, 3 curves would be created. And when I completed the tutorial the first time, inside the container, there was some flat structure obstructing half of it. This obstruction didn't show up in freecad, but after exporting the STL, you can see it in Windows Explorer. It's certainly no fun when the program makes it look one way, and it looks messed up after export. I couldn't fix it. So I tried doing this tutorial again (probably about 5 hours for all of this because I am not an expert), and I was able to get this technique to export 2 models: Cover and base. I did away with the container part of the exercise. And I was able to get those threads to be on each object, cover and base, using the curves workbench rather than using the "connect" method of attaching segments to either end of the helix. I also did this with parametric modeling so that I could adjust the model later when including with another project.
Finally, it came time to use Cura, and it complained about supports for the threading. I'm curious as to how you were able to print this without support complaints.
Anyway, I wanted to say thank you for the tutorial, and I put a lot of time into completing it. You are a great teacher for an occasionally frustrating program. For home amateur builders, being able to create separate parts printed separately, connect them, and be able to reuse other parts is a necessary part of the whole process. For me, learning threading is part of that. Thank you.
After I explode the sketch, I'll realize I need to edit the sketch again, but I don't know hiw to get back to the sketch. I managed to somehow have a sketch underneath the exploded sketch of lid and base separately, but now the threads are missing in the available sketch. I'm lost.
Great lesson! Gonna make some 3d printed threads.
For people like me, who missed, that lid thread profile goes upper - lid thread profile higher, then 1mm from side. Watch fragment with done sketch closely to save some time.
Makes a nice lunch box.
Good idea, I may have to print one, today I broke mine.
This was very informative, especially after doing a similar project last year and wound up using the Fasteners workbench to get similar threads. I prefer your method at least for simple threads like in this use case. Much easier to understand what is going on and how to correct issues.
Glad you enjoyed
Simply brilliant. An extreme amount of information presented in a concise and straight forward manor. Thank you. My take away: Explode from a Compound Sketch (nice) and lead in/out from a helix used in a revolve (beautiful).
Glad you enjoyed. There are so many different workflows and ways to tackle such objects and this workflow can be quite useful for getting the basis your plan down first and then tackling the 3d part
@@MangoJellySolutions The biggest component you have taught me is maintaining changabity of the project. From editable sketching, to referencing points throught different sketching techniques. You should be tenured in a college somewhere.
This seems very long and combersome. There are multple tools that create threads ,is there no simpler way to make a thread on a lid?
NOTE: The 'Curves workbench' has changed its name to just 'Curves'.
The sketch planes for the lead in/out edges should be rotated around local X or Y to match the helix angle. I don't think it will be a problem with the generous tolerances on your threads, but there could an interference with longer leads or a steeper thread.
WONDERFUL TUTORIAL. Loved it. Was hooked all the way and learned many more tricks. I was stuck in the part design mode since my first video. Now its waaay more freedom. Thanks again
Glad you enjoyed. When there is something practical to build it is so much better and more interesting :)
Why don't you just use the Fastners work bench for this kind of operation?
Hah - I created a model of screw lid container driven by a spreadsheet. This technique is a so much simpler method most of the spreadsheet settings are not needed! Very cool. Thank you
I do like the idea of driving the sizes by the spreadsheet. You could still do that and make a hybrid of the two. A sort of container factory.
hi i tried the method but the cap is sligtly bent when it 3d printed and tried to attach it with base any help will be appreciated
what color was that PLA? i have been working on a challenge coin for a very long time and that color would be neat
It's silk pla emerald but it comes out chrome. On the spool it looks greenish silver but the results as you see are different colour.
@@MangoJellySolutions any chance you could sent me the product name and number. i see a DO3D, FEEETECH, TTYT3D, etc... but all of them show test prints that are green as well.
thank you in advance. LOVE your work
@@sk1pp3r65 Here's a picture of the spool ruclips.net/user/postUgkxWP6272ll7fJa6O3MWlC2nEd-MLYXBSOo Can't find the model number
great tutorial, made my first screw! one cool thing i stumbled on in the curves workbench is blend curve. at around 28 min after creating 3 point curve in sketcher i go to curves and select the helix and the 3 point curve then click the blend tool. you can then edit the blended curve in the menu. this blended curve can be edited to follow the z path oh the helix instead of being flat.
Nice tip and glad you enjoyed the tutorial. BTW if your interested the blend curve has been integrated into the surface workbench in 0.21 of freecad. But it works in a slightly different way.
Please make one video for wood carving design 3D and how to converr error shell to solid
Excellent video, as always. Learned some new stuff that I did not know, like the exploded sketch. I need to make a ball joint with a cap that screws on to tighten down the ball. This is for the canopy mirrors for my 1:1 scale AV-8B Harrier replica that I'm building. This video is exactly what I needed, as the ball joint assembly is almost exactly this container with lit, with the obvious difference that the inside of the container is a sphere to match the ball.
Glad you enjoyed the video and thanks for sharing what you used the workflow for. Always great to see what people are making with the shared information.
Hi Deren . This video lesson sure came at a good time . T need to make some of these with o ring seals thank you so much . great video Sir . I was on another channel and I saw his presentation on the dynamic workbench . I was wondering if you could do a video about it ? I know your video would be more detailed .
Thanks my friend
All The Best
Terry
Great to hear you have already found a use for the video. Yes I know the dynamics workbench, I will add it to the list.
That was amazing. I am starting out learning all this and getting ready to purchase my first 3D printer. hope one day I can do what you did here. thank you
When you start seeing those designs rolling off your printer there be no stopping you. 😊😊 Glad you're enjoying the videos.
Sorry, I can not use the Connect for the Sweep.
Strangely you keep coming with solutions I just need. It must be a telepathy 😂👍👍👍👍👍👍👍👍👍👍
I knew you was going to say that 🤣🤣🤣🤣
Tutorial 41 on a screw top container was one on my list to learn. I had fusion failure! I'm using FreeCAD v21.1. Just a helix, failed. Straight line lead in/out failed. Added the arc instead of the lines, left the Connect (didn't use Curves Workbench to join the arcs to the helix, which failed) and the fusion worked. But the arc on the container seemed to be hollow, despite checking solid in the sweep. Printing the container part now. Will see how it turns out in an hour or so. The top worked fine.
Learned lots as I always do with any tutorial, particularly the Mango Jelly tutorials which usually have many aspects to them.
Thank you for this tutorial, it's a huge help and the instructions are nice and clear. I was wondering though; I got an error when recalculating the thread using the JoinCurve (around 30:54 in your video). The error is just 'Recompute failed'. I'm using FreeCAD 0.21.0, Curves shapes 1.0.4 and Curves workbench 6.13. Is there perhaps some other addon that I'm missing?
Thanks in advance.
This would be a good part to use a multi-start thread on.
Thanks for this content, amazing tutorial. Darrren are you aware where to find the most commom thread types used on plastic caps/lids? I've got equipement reservoirs and containers in need of new screwing caps... In Fasteners WB I can't find any suitable one. Greetings
Thank you, glad your enjoying the videos. This was a pretty interesting thing to look into as I have thought much about standardised threading for containers. My research has lead me to something called the threaded profile workbench which looks like it might fulfill the needs that you have forum.freecad.org/viewtopic.php?t=48563
@@MangoJellySolutions Thanks a lot, I shall take a pick on it! Cheers
As always .. Top Tier Content .. !!! Thank You for sharing .. Cheers :)
Much appreciated!👍👍😊😊
Thanks!
Thank you so much :)
Love your channel! Subscribed!
I have a little project where I need to 3D print mounts for haptic feedback transducers, which needs to clamp onto 2.0 inch poles. I'm going through your tutorials to learn FreeCAD! Thanks for your tutorials! ❤
Thank you, welcome to the journey. Wow sounds like an interesting project!
@MangoJelly Solutions for FreeCAD Yeah, it should be a challenge for a newbie like me! Curious, can Free3D create squircle objects? It's essentially a square with rounded corners and slightly curved sides, to suit the shape of the underside of the transducer?
Excellent tutorial. I've been exporting in either 3mf or step for a while now as PrusaSlicer accepts both. 3mf files are smaller than STLs and STEPs are imported better if there are curves.
What filament were you using?
Hi Mark. Interesting about that file type export, didn't know it was smaller. The filament is silk pla. It surpose to be emerald green but more of a chrome.
@@MangoJellySolutions .3mf is all in a zip which makes it smaller. That filament does look more chrome than green.
@@MangoJellySolutions If your slicer accepts it (Cura doesn't seem to) then exporting as STEP gets rid of the tessellations you would see with an STL file.
why is my thread twisting
Fantastic tutorial, dude! The only thing I didn't like was how difficult it was to deal with the tapering at the ends of the helix; threading should either be built in or there should at least be a tool that allows you to handle the tapering parametrically. After all, threading ain't new--I mean it's 2000 and friggin' 23, ffs! However, you did and excellent job of working around it 😎
Glad you enjoyed, yep that taper was not the easiest and I'm not a fan of the technique. Normally you would go for a fillet and that solves the problem but that often fails with helix. Will be on the search for a better way.
@@MangoJellySolutions I'm testing the Fasteners workbench right now, but am also on the hunt for a better way to handle tapering. I suspect, however, that it'd require code. I could figure it out, but I'm not a Python coder (I have 3 decades of C). In any case, if I find a solution, I'll let you know.
@@MangoJellySolutions After a bit of trial and a sh!tload of error, it seems that one approach is to chamfer the lip of the lid and the bottle on the facing sides, then do subtractive spirals. You'd have to redesign the thread profiles, though. I tried this but could never get FreeCAD to behave; it produced anomalies, error warnings, and the model even disappeared. Frankly, I'm impressed that you and so many others can get so much out of FreeCAD without driving yourselves insane. But I've encountered far too many bugs and GUI/workflow inconsistencies and overall WTFs to continue with it.
Having said that, I haven't been particularly impressed with a lot of the other free and commercial options, either. They're either too bloated, too expensive, browser-centric, require Windows 10 (I can't/won't change OS's mid-dev), expose your data to their public cloud (some free options), too limited (free versions), non-parametric/polygonal (e.g. Blender), etc. What an abysmal wasteland CAD software seems to be.
I'm opting to write my own artist-engineer centric software (i.e. a CAD suite that allows for a fluid, non-destructive, non-linear workflow) and output to STL. It'll take some work, but it's the only sane option for me.
Regardless, I've been quite impressed with your videos and wish you great, great success!
Agree, the Thread Taper was a bit tricky but I managed it eventually. I think Darrens objective was to give a Us a variety of "Work Arounds" should One encounter problems. Not sure if the Fasteners W'Bench could have been used? Things like the above seem to involve Trial & Error "tweaking. Still all good experience. Unlike yourself I'm an absolute Beginner so I have no CAD background to compare to. FreeCAD seems to Me to have a lot of Different ways to do the same thing, I'm a Hobbyist and reckon FreeCAd 'll do Me (If I dont go Insane First ;-)). I've just dumped Windows for Linux Mint & find my Decade plus PC is running FreeCAD & everything else better than before. Likewise I'd say Darren is the best online Tutor I've encountered.
Great video Thans! Nice introduction to threads!
Thanks, Glad you liked it!
Only wow. So great. Thank you 🙂
Thank you too! 😊😊😎😎
wow good
Clever!
Excellent video. Learned lots.
Great to hear
FIRST! lmao
lol
@Mangojelly how do I contact you
Another informative video. Thanks for tying the model to 3D printing it.