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Parallel Lines with dimension use angle instead of distance.
anddy_archer
Member Posts: 8 ✭✭
So, I've used OnShape on and off over the years and I've never had this problem: I have a rectangle sketch on one plane, then on an offset plane from that sketch I make another rectangle that has it's edges relative to that original rectangle. Both rectangles are orthogonal so the sides are parallel. Or so I thought. When I set the distance between the sides, I get an angle dimension that makes no sense: it's an angle with a value that is half of the value I set. In my linked example document, I have the offending dimensions as driving and then non-driving dimensions from corner-to-edge show that the distance is not what I've set.
I can constrain the sides to be parallel to make sure, and that doesn't over-constrain the drawing. So something is amiss here. I just don't know what. It feels like a bug. Any ideas?
Here is an example document:
https://cad.onshape.com/documents/0056c70b6cc07cd5116922d1/w/c983bd2f2b4ef6bd9277920c/e/ef7d9440db2c1b286bb97254?renderMode=0&uiState=6340742219526f37e6637638
I can constrain the sides to be parallel to make sure, and that doesn't over-constrain the drawing. So something is amiss here. I just don't know what. It feels like a bug. Any ideas?
Here is an example document:
https://cad.onshape.com/documents/0056c70b6cc07cd5116922d1/w/c983bd2f2b4ef6bd9277920c/e/ef7d9440db2c1b286bb97254?renderMode=0&uiState=6340742219526f37e6637638
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Best Answer
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Evan_Reese
Member Posts: 1,981 PRO
If I understand what's tripping you up, it's a feature, not a bug. If you dimension to a construction line, and mouse over it, you get a diametric dimension instead of a radial one. It treats it as an axis of rotation or symmetry, which is really handy sometimes.
Evan Reese / Principal and Industrial Designer with Ovyl
Website: ovyl.io0
Answers
Website: ovyl.io
I'm futzing around trying to repeat what you are doing, but no hover or clicking is letting me replicate your gif. Thank you for the gif btw. I'm glad this isn't a bug, just my ignorance--as I thought.
** OK, I kept trying and I got the missing part, I'll need to set that when I make the dimension. My problem is that I often just tap-tap-confirm on my touchpad and it gets set into the rotation mode. I'll just need to zoom in and make sure I put the dimension on the inside.