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Rounding corners..lossless
stephen_motew
Member Posts: 4 ✭
Hi. I have created a sketch to specific measurements that include a distance to the apex of a rounded corner. When rounding the corner (either in sketch or extruded fillet) there is loss of the measurement from the initial rectangular dimensions and I was wondering how to create the correct distance to the apex of the rounded corner. Example: Create a rectangle 20mm x 30mm, which matches the final dimension I need, then rounding the corner I 'lose' that distance and want the apex of the corner to match to original 20mmx30mm dimensions. Hope this makes sense.
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Comments
This sample uses a centered rectangle with dimensions on the fly with a fillet at the corners.
Unless you are dimensioning the rectangle by selecting the sides after.
https://cad.onshape.com/documents/f74bee447f89826d0f600190/w/76703c3d6a458ef733252579/e/889ec5dbda3b7cd4c912a3e9
Can you make your document public and share a link. Easier sometimes to see what's going on.
I know this discussion is 2 years old — but the OP dropped out of the discussion and my problem is identical to his, and so answering it here will be good for future searches.
Here is my drawing:
https://cad.onshape.com/documents/817a70945c31c68b5b6a6baf/w/dae69727e5a8bb8b4ab668b8/e/e643712e26699954b04d76be
The two horizontal dimensions, 21.115 and 22.435, would be 21.0 and 22.5 if you cut out the trapezoid and then rounded the corners (ie, when manufacturing).
How would I (and OP) get the "correct" dimensions? In the supporting sketch, the point where the lines originally met is still present, but not in the drawing.
You could use virtual sharps in the drawing. That'll provide 'corner' points to dimension.
https://cad.onshape.com/help/Content/drawings-construction-tools.htm?Highlight=virtual%20sharp#
in the case of a sketch…. and the corner point is not there. you can add a point near the corner and set the point coincident to both lines that are making the corner. In drawing I think you have two options virtual sharps like martin mentioned and the same method you can do in sketch mode,