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Weird sweep behavior with spline
henry_feldman
Member Posts: 126 EDU
Can someone explain what is happening with the sweep along this spline? I was expecting it to be like a loft between the 2 faces, in fact if I select the second rectangle it weirdly goes and does a mirrored sweep, so I am just sweeping one profile. The issue seems to be that the spline isn't normal to the horizontal plane, but it sure seems to be in the sketch (sketch one) although I can't figure out how to make that a hard constraint although since the control handle is set to the same distance from the origin as the end point isn't that perpendicular anyway? (Is there a way to constrain a spline control handle to perpendicular?)
https://cad.onshape.com/documents/9d0289d7fb06d459e29effa6/w/06dbc581e2ab712abdbe6362/e/d3a1953f16a189ee57882ee6
https://cad.onshape.com/documents/9d0289d7fb06d459e29effa6/w/06dbc581e2ab712abdbe6362/e/d3a1953f16a189ee57882ee6
0
Best Answer
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øyvind_kaurstad Member Posts: 234 ✭✭✭Probably. If the sweep profile is normal to the end of the spline, then it will stay normal throughout the sweep. If you want the end of the sweep to be at an angle to the spline (i.e not normal), then you need to use the replace face command for that. That is also currently how you could "stop" the sweep somewhere mid-spline (you would then have some plane/face that the spline passes through, and then after the sweep (which will be along the entire spline), you'd use replace face on the end face of the spline and replace it with the plane/face where you want it to end.
5
Answers
Perhaps you are being confused by the fact that sweep maintains the angle between the swept profile and the sweep curve/spline? Your sweep profile is not starting off normal to the sweep curve, so it stays off normal throughout the sweep, and therefore ends up like it does.