Why is this happening?? Extrude 1 did not regenerate correctly: Boolean operation failed to return a

rob_williamson179

mahir

It's hard to tell without looking at the actual part studio, but it looks like you're trying to remove part of a mesh body. Whether you're adding/removing to/from a mesh/solid/surface body, Onshape doesn't like degenerate geometry. Check to make sure you're not leaving an knife edges or line to line geometry. If you share a link I'm sure someone here can take a closer look. Also check out these posting guidelines for future reference.

S1mon

I would highly recommend remodeling something like this as a regular solid part since the features are so simple, but I went ahead and figured out how to fix the issue that you're having. I ended up changing the sketch a bit and using split instead. Interestingly, if I didn't add those "extra" lines outside the part, the split tried to extend the half circle to be a full circle. I have't done anything with STL/3MF imports before, so I'm really not sure how fussy they are, but anyway...

mahir

It's hard to tell without looking at the actual part studio, but it looks like you're trying to remove part of a mesh body. Whether you're adding/removing to/from a mesh/solid/surface body, Onshape doesn't like degenerate geometry. Check to make sure you're not leaving an knife edges or line to line geometry. If you share a link I'm sure someone here can take a closer look. Also check out these posting guidelines for future reference.

rob_williamson179

Thanks.

https://cad.onshape.com/documents/9d10afff55aa77b361e2645c/w/835dc98c86427d2e899e604c/e/3504c7ba69e98d31ca02599d?renderMode=0&uiState=63983263dc243e2ef98c0809

S1mon

I would highly recommend remodeling something like this as a regular solid part since the features are so simple, but I went ahead and figured out how to fix the issue that you're having. I ended up changing the sketch a bit and using split instead. Interestingly, if I didn't add those "extra" lines outside the part, the split tried to extend the half circle to be a full circle. I have't done anything with STL/3MF imports before, so I'm really not sure how fussy they are, but anyway...

rob_williamson179

S1mon said:

I would highly recommend remodeling something like this as a regular solid part since the features are so simple, but I went ahead and figured out how to fix the issue that you're having. I ended up changing the sketch a bit and using split instead. Interestingly, if I didn't add those "extra" lines outside the part, the split tried to extend the half circle to be a full circle. I have't done anything with STL/3MF imports before, so I'm really not sure how fussy they are, but anyway...

S1mon. I did something similar with the original sketch and it worked fine. I modeled this in Onshape originally, this was just an exercise to see how easy modifying an imported model would be. There is a chamfer at the bottom of that part, maybe that has something to do with it.