3D Printing Threads - 3D Printed Thread - FreeCAD Thread Tutorial
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- เผยแพร่เมื่อ 16 ต.ค. 2024
- I created working 3D printed threads, all created in FreeCAD!
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More information about the fasteners workbench here: github.com/sha...
I printed all my test prints with a layer height of 0.1mm (100 micron) at about 10mm/second. Printing at 0.25mm (250 micron) resulted in too tight connections between the threads.
I started using the following default screw scaling settings: A0,990 and B-0,050. And the following default nut scaling settings: A1,030 and B0,100.
PRINTED OUTER M6 THREAD WITH METAL ONLY (STANDARD SCALE SETTINGS)
It seems that tightening an M6 metal nut on a 3D printed bolt or rod is done easily. Tightening a metal or 3D printed bolt on a 3D printed thread failed.
So 3D printed outer threads only worked with metal nuts when using the standard scale settings.
FAILED SLOW SPEED
An M6 nut 3D printed on a very slow speed also didn't work.
The printing speed was about 6mm/second.
WORKING BIGGER M8 NUT
Then i 3D printed two (bigger) M8 nuts with 3D Printer Compatible mode on. The nuts (bigger than M6) fit a metal M8 bolt very well: the first 3D printed inner thread that works.
FAILED BIGGER M8 NUT
I also printend an M8 nut with 3D Printer Compatible mode off.
That one didn't fit, so this was the first time i noticed any difference
between setting 3D Printer Compatible mode on or off.
The smaller M6 threads were printed on a wrong scale to fit at all,
also when 3D Printer Compatible mode was on.
WORKING M6 NUT
I changed the 3D Printer Compatible mode settings with another M6 nut.
Before, there were too tight connections between the threads.
Changing the nut scaling settings to A1,100 and B0,100 gave me a wrong STL file. I changed the nut scaling settings to A1,050 (default=A1,030) and kept B0,100 as default. It worked and the 3D printed nut fits well on a metal and scaled 3D printed M6 bolt!
WORKING M6 SCREW
I also changed the screw scaling settings to A0,970 and kept B-0,050 as default. This 3D printed screw works with a metal nut and a scaled 3D printed nut!
CUT OUT THREAD
I also tried to create cut out thread that works.
So i cut a screw (A1,010 and the default B-0,050) out of a cube to create inner thread in a solid. This didn't work. The connection was too tight.
Then i cut a screw out of a cube again. I changed A1,010 to A1,030. That worked well! A little tight, but good enough to use the thread with metal and 3D printed screws.
The tests were made on the Felix Pro 2 3D printer, so another printer (with other filament) can differ from my results. I used PLA instead of PETG, because PETG is more stringy. That could cause to fail the test prints a little faster. More info on the FreeCAD forum: forum.freecadw...
My 3D print settings for the blue prints:
blue PLA | 600mm/minute (10mm/second) | hotend 185°C | bed 55°C | 250 micron | infill 20% | 3 top layers | 3 bottom layers | 3 outline layers
fan 100% | brass nozzle 0.35mm | extrusion width 0.40mm | retraction 1.00mm | extrusion multiplier 0.87 | coasting 0.30mm | wipe distance off
This FELIX Pro 2 is recorded with permission from the marketing department of FELIXprinters. www.felixprinte...
This video was recorded in the stable release of FreeCAD 0.18 (2019-04-04). www.freecadweb...
👍 Thanks for watching the video 3D Printing Threads - 3D Printed Thread - FreeCAD Thread Tutorial
👍 Thanks for watching the video FreeCAD Fasteners Workbench - FreeCAD Thread - FreeCAD Screw Tutorial - FreeCAD Fasteners
#AllVisuals4U #3DPrinting #Thread #Screw #Fasteners
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I wish I saw this video 5 hours ago. After lots of trying, I found the solution but this video helped me too. Thanks :)
Glad I could help! Thanks 👍
I'm in the process of learning FreeCAD and these two videos on the Fastener WorkBench and 3D printed threads were very helpful! Thanks!
You're welcome! Good luck with your learning process.
How is 3D Dprint compatibility supposed to help you if it makes the screws smaller and the nuts bigger? That's fine if you print screws and nuts. But if you take the smaller screw (thanks to 3D printing compatibility) to cut it out of a body, your thread will just be tighter than the standard one. The solution is completely different. With the hole feature in part design, you check model threads -> clearence and set the best as possible value for your printer and filament and thread size. its a bit try and error
This is an old video. The Hole feature was not as good as it is now. Thanks for the feedback!
New tools with the hole feature, but the scaling thing is what I needed. Holes still come in undersize. Going to try scaling down my bolts so I can keep my prints. Then, I will go fix the internal threads in the model.
You can scale down threaded holes for normal bolts: th-cam.com/video/eyIIPpbXxH8/w-d-xo.html.
@@AllVisuals4U Yes I did that, however the 3D scaling tools in the Fasteners settings does not seem to apply to threads made with the hole tool.
Instead I used the fastener scaling to figure out what size dia I needed. Then used the custom clearance in the hole tool to make the diameter meet the fastener scaled version.
Sounds strange but that's what I had to do to get 3D printed threads to work with the hole tool.
Unfortunately, but interesting to know! It would be nice if there would be an external thread generator. You can also cut a fastener out of a solid. Maybe that fits.
Great!! I was thinking that i was making some mistake printing the nuts and bolts, but you have the same issues, non of them fits. So right now i have a brand new starting point for test again the fastener workbench, i was thinking to start creating screw threads from scratch.
Good luck with the fasteners!
Hi there. You are awesome and the way you make your videos are so clear. I am so gratefully with your work.
That's very kind of you!! 👍 Appreciate it!
Very helpful. Thank you.
Thank you too!
I'm still working with this but I think that is why you use the tap tool when cutting holes. I think is gives a larger scaling automatically
I believe that the '3D Printer Compatible' mode creates a bigger or smaller hole.
What is the size Scale (A), Offset (B).
Scale A is a scale factor of the original diameter. Scale B is another factor, see the formula below these fields.
In my opinion it could have been one clearance factor, like with the (newer) Hole feature: th-cam.com/video/hXkNqsATWcs/w-d-xo.html. I don't know what the function of two factors is.
Did you use the support for the internal thread?
No, that's not necessary.
@@AllVisuals4U Aside from doing the Cut method, does it work to use the thread in Hole in PartDesign workbench?
Which slicer did you use? Thanks for sharing all these!
Yes, the Hole feature now works with real modeled thread in FreeCAD 0.20. I use Simplify3D. No problem!
I'm not surprised that a boolean cut of a threaded rod or a bolt from a solid does not result in a fitting inner thread. Look up the article "ISO metric screw thread" on Wikipedia, there's a picture there that makes it clear immediately. Inner and outer threads have different profiles!
You're right about the differences! I wanted to know if there was any difference between the 3D printer compatible mode on or off to start with. I thought the 3D printed compatability option would make it work at once, but it didn't with the default settings.
There is an "arbitrary length threaded rod for tapping holes" in fastener workbench that I assume is the correct object to use for doing boolean cut with. I am about to 3d print one of these cuts, hopefully it works.
Thank you very much.
You're welcome!
Omg, I can't believe you used the tool so wrong: when you create thread by cutting with a screw (which is already smaller for 3D), you create a smaller thread on nut than it should be. The good way is to create directly a thread over a hole, or create the nut and apply an intersection boolean operation with whatever object you have. That will generate a proper thread nut size.
Thanks for the feedback! I also scaled it for 3D printing to fit. I'm going to test threads again with the FreeCAD 0.20 hole feature.
Why didn't you use a spanner/wrench?
Yeah you're right! I was quickly searching for something that could hold a fastener. A wrench was a better choice.
Hi, i want to use "2mm screw" Socket (i want to empty the selected area where i can use this screw to fit my 3d printed parts. ). The reference diagram "i.ebayimg.com/images/g/zS4AAOSwGwlaPjoc/s-l1600.jpg" how should i empty the selected area, to use this screw thanks
Hi, I assume that you want to use an M2 screw to assemble 3D printed parts? You want one part where the screw can be put in (a 3mm hole) and one part with M2 thread?
@@AllVisuals4U Hi Thanks for reply, let me explain you a little bit, actually i want to use these screws in my project please check this video at marked timing, th-cam.com/video/pg-M-11hGq4/w-d-xo.html
could you please help identify the screws size or any online sample 3d file,
this guy build this engine in freecad using 3D printer,
check this page he mention the screws but i am not able to match shown in the video www.thingiverse.com/thing:1938142
Regards Thanks
Hi, the M1.2x4mm Phillips Cross Drive Round Head Self Tapping screw is the only screw used more than 2 times (13x) according to the list on Thingiverse. In the video at the marked time, is see 6 screws, so there must be more than 2 of them. I cannot find it on the photo where all the parts are on. I think the image shows the bigger parts exluding the bolts and screws. Otherwise i don't know.
Why? What purpose is there for these?
Just my test results of creating 3D printed threads that work. Now I can use this knowledge in a future project where I need fasteners.
@@AllVisuals4U Why would someone want to print fasteners? Or threads? Can't you just buy those? can you give me an example? I don't get it.
It can be that I want to screw multiple 3D printed parts together. Then I can print thread inside those objects. Printing the bolts and nuts were more an experiment/hobby thing.
You can make bolts that are not available off the shelf. Like a bolt with a center hole, or a nozzle, or bolts wit your own head desing so you need a special tool to drive it, or color code your fastener to make assembly easier. There's a lot of possible uses for this.
@@IceTurf This can be really helpful. I'm currently designing a spool holder for my 3d printer. Being able to design custom adapters for various spools which can be threaded on an m8 threaded rod is really helpful. Of course you could just build it with regular nuts but hey, why not print the threads right away in the design?