Can't make internal thread in conical hole

david_rojas100

I've literally been at this for hours. I'm trying to make an internal thread in a conical hole that I made in a plate-like object. But every time I perform the 'Sweep' feature, making sure to select 'Remove', the feature never generates properly and I cannot understand why. This is a group project and unfortunately my other group members did not give me sharing permissions for the part studio so here are a few screenshots of my current dilemma. 



Any and all help would be appreciated. Thank you. 

- David

owen_sparks

If you hover over red header on "Sweep1" it should give the error as a tool tip. What does that report?

Jake_Rosenfeld

Hi @david_rojas100

I suspect that the swept part here is self-intersecting.  There is probably an error message saying as much if you hover your mouse over the red "Sweep 1" either in the Feature List or at the top of the Feature Dialog.

If you keep your Feature Dialog open, and press the eye icon next to "Side Plate" in the Parts List to hide it, you will be able to see the full error graphics for this sweep.  I suspect that for the first few turns your triangular cross section is fine, but as it gets to the bottom the turns are tight enough that the sweep profile begins to intersect itself.

Maybe design the triangular profile at the bottom of the helix instead of the top to get a sense of how much space you have?

Or do something similar to the fix in this other thread:
https://forum.onshape.com/discussion/comment/39403#Comment_39403