Howto simplify my sketch?

nocry3

I would like to construct the strips shown in the first picture, which follow an elipse.

In the sketch (second picture) you can see my complicated construction with a linear pattern and a manually added rectangle to intersect the eliptical construction line.

Does anyone have an idea for a simpler way?

I did not manage to bind the linear pattern directly to the elliptical construction line.

Link: https://cad.onshape.com/documents/da35c54a3557899789e0a8cc/w/c8c23e33e58053d6dbc9ae74/e/fe9d3f508ed574890092f3c7

S1mon

Don't do this in a sketch. Sketch one rectangle which has the corner point coincident with the curve, extrude that, then do a linear feature pattern where you select "apply per instance" so that the sketch is recomputed per rectangle.

https://cad.onshape.com/help/Content/linearpattern.htm

shawn_crocker

This also works.
https://cad.onshape.com/documents/03ccec15842c6acc0933d21b/w/932047d323fed28f0126183f/e/d19b911b2138c6c16956d0d1?renderMode=0&uiState=63fa4c40dce199462ff0b3cf



I didn't show it in the gif but I would finish the sheet metal model after to turn all the parts into regular solid geometry.  This method works with sheet metal because Onshape automatically keeps sheet metal edges perpendicular to the sheet metal face.

nocry3

S1mon said:

Don't do this in a sketch. Sketch one rectangle which has the corner point coincident with the curve, extrude that, then do a linear feature pattern where you select "apply per instance" so that the sketch is recomputed per rectangle.

I have tried to implement your solution. Unfortunately, I only get results as seen in the picture....

What am I doing wrong?

https://cad.onshape.com/documents/da35c54a3557899789e0a8cc/w/c8c23e33e58053d6dbc9ae74/e/fe9d3f508ed574890092f3c7

Evan_Reese

@shawn_crocker
That's pretty clever. I wouldn't have thought of that.