I’m trying to split a closed Polysurface model. It has to be split many times as shown by the split lines. Some of the splits work and some don’t and I don’t understand why. I’ve tried doing boolean split with a surface also, and they fail on the same vertical lines (haven’t checked them all though). The polysurface is basically an outer and inner surface joined at the upper edges. I do this quite a bit with models (for CNC manufacture) and normally the same construction (outer and inner skins) but this one isn’t doing what I’d expect. Is there a simple explanation for this? Or something wrong with the model?
Thanks for quick reply. I did change the tolerance earlier. It is modelled in mm, with a tolerance of 0.1mm. Model overall length is about 2400mm.
Anyway, just tried again with tolerance of 1mm and it is better - at least with splits - Boolean split still not working at this tolerance), so I guess that’s the way to go. Ultimately that tolerance (if reflected in that sort of error) wouldn’t be acceptable, but I will play around with it. I suspect the model is the problem but not sure what’s wrong with it or how to fix.
After a detailed look at some weird effects, I think I’ve figured out what is causing this. The designer appears to have put 2 coincident polysurfaces together (they just look like 1) and this really screws everything up. I asked him to check if this is possible, but certainly when I found and deleted one of them (both inside and out), it worked fine - with normal tolerances.
