rahixMay 9

Next up: I wrote a #FreeCAD macro for rib thread forming, rule R5.4 from my Design for 3D-Printing guide.

https://github.com/rahix/FreeCAD-Macros/tree/main/RibThreads

I didn't even have time to verify all the thread sizes yet (because I'm not home and no mobile 3D-printer yet), so if someone wants to help out here, please do :)

#3Dprinting #DesignForManufacturing #dfm #FreeCADFriday

FreeCAD-Macros/RibThreads at main · Rahix/FreeCAD-Macros

A collection of various FreeCAD macros. Contribute to Rahix/FreeCAD-Macros development by creating an account on GitHub.

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Show threadrahixMay 10

Alright, M3, M4, M5, M6, and M8 parameters for the rib thread macro all look good after testing.

The same parameters can be used for both vertical and horizontal orientation. For horizontal rib threads, ensure they are rotated so there is no unsupported rib floating at the top.

#3dprinting #freecad

Show threadDJ🌞
@rahix what's the tightening torque before this thread strips?
May 10 at 3:40pmWeb
Show threadnatlampenMay 10
@infosecdj @rahix not sure if this is the exact same method. Similar was assessed in this video, https://youtu.be/HgEEtk85rAY?feature=shared
A better way to add threads to your 3D prints

YouTube
Show threadrahixMay 10
@natlampen @infosecdj yes, that's the same method :)
Show threadrahixMay 10

@infosecdj like most plastic threads, torque is not a reliable indicator and they strip very easily. the smaller the thread, the worse it gets. for M5 and up, you can somewhat feel a torque difference after screw head contact, but i wouldn't rely on it either.

the usual approach is driving the screw until head contact and then for an additional fixed angle that doesn't stress the threads too much...