this post was submitted on 01 Aug 2025
40 points (100.0% liked)

3DPrinting

19195 readers
56 users here now

3DPrinting is a place where makers of all skill levels and walks of life can learn about and discuss 3D printing and development of 3D printed parts and devices.

The r/functionalprint community is now located at: or !functionalprint@fedia.io

There are CAD communities available at: !cad@lemmy.world or !freecad@lemmy.ml

Rules

If you need an easy way to host pictures, https://catbox.moe/ may be an option. Be ethical about what you post and donate if you are able or use this a lot. It is just an individual hosting content, not a company. The image embedding syntax for Lemmy is ![]()

Moderation policy: Light, mostly invisible

founded 2 years ago
MODERATORS
 

https://www.youtube.com/watch?v=XKrDUnZCmQQ

What if your parts just fit—every single time—no matter what printer, material, or slicer settings you use?

In this video, we break down the proven design principles that eliminate the guesswork from tolerances in 3D printing. You’ll learn how to design press-fits, snap-fits, lids, and interlocking parts that are robust to shrinkage, color variation, and machine quirks. Rounded corners, chamfers, compliant features, and grip fins — we cover it all and show why designing for process is more reliable than tweaking slicer settings.

By the end, you’ll know exactly how to model your parts for perfect, repeatable fit — anywhere, anytime, on any printer.

you are viewing a single comment's thread
view the rest of the comments
[–] TheButtonJustSpins 2 points 22 hours ago (1 children)

I'm still trying to get the hang of that sort of fit. I saw it in a video about crush ribs but it didn't work when I tried it. Will keep at it until I figure it out, though.

[–] j4k3@lemmy.world 3 points 22 hours ago

Just do small test prints first. For a table saw feather board in PLA this worked but it is length and material dependant.

Calipers are consistent for the 2.6mm but too dead of a battery to charge the capacitive sensor past around 50mm so the scale shows ~63mm long. I think the optimum angle is around 30° but don't quote me. I just imported an image of another feather board and used it to get basic working dimensions. You only need to know 1 measurement in a flat image in CAD to calibrate the size for use in the background to draw your sketches on top of. With a table saw feather board, you know the slot dimensions. You could easily screenshot the video's sketch of the feather pattern here, import that and make a copy at any scale in FreeCAD. Mango Jelly has YT vids about this if you need them.