TinkerCAD ISO Metric Thread Problems
Hello! Not being very CAD adept, I use TinkerCAD for most of my 3D designs currently and am having a problem when I try to print an ISO Metric Thread (and matching bolt) in PrusaSlicer. Everything looks great on TinkerCAD and it comes into Prusa looking spot-on, but as soon as I slice it I get this odd weave pattern that I cannot seem to overcome, and it prints just like this too. I've tried this with my settings all over the place and I cannot get the weaving to fix itself, so I'm wondering if it's a problem with how TinkerCAD saves the STL file.
I've printed other people's nuts and bolts in Prusa and it works, so this seems to be more related to how TinkerCAD creates these objects.
Has anyone else run into this and is it just a no-go on TinkerCAD's implementation of threading or is there a setting in Prusa that resolves this?
RE: TinkerCAD ISO Metric Thread Problems
Not sure what you mean by weave but the dark blue areas on your pic are being printed as over hang perimeter. Why TinkerCad is only doing that for part of a thread is strange as a thread should be even all the way up. Because it’s over hang it will be printing it with a layer height equal to nozzle or extrusion width as that’s what slicer does with over hangs (as it can’t squish against the layer below it calculates it as being same height as nozzle width as its cross section is that). This is most likely what is messing up your fit.
Id try and find what settings in TinkerCad is causing that. Stop it being produced like that in the model to start with.
For a stop gap measure you could turn off over hang detection in PS which will print them with normal layers. That might allow you to print it but as those sections are further out than others it’s going to be one those try it and see if it works in practice.