I'm trying to wrap a datum curve (sketch) around a cylinder, ultimately to produce a cylindrical cam.
My attempts have been troublesome so far - various features simply fall over if I get anywhere close to the real dimensions that I know we already manufacture on similar parts.
After some experiments, I've found a strange behaviour with the Wrap feature that I'm using to map my (linear) cutter path onto the cylinder:
- I've sketched the path so that it's symmetrical above and below the centreline. I have to do this because if I sketch it all on one side, it fails - it appears that Wrap only works over 180°.
- For the moment, and for this particular path, the lower half contains the profile and the upper half is just straight.
- For testing, I'm wrapping a fixed length around a larger cylinder. This has revealed that my symmetrical sketch is being wrapped asymmetrically - it seems that the wrap is based on line length and not on tangential / circumferential distance!
Can anyone confirm this, or suggest a workaround? We've previously modelled these using a Toroidal Bend, but I don't think the geometry is accurate and so I'm spending a few hours seeing whether there's a better way.
Thanks!
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