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Parallel Lines with dimension use angle instead of distance.

anddy_archeranddy_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

Best Answer

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    Evan_ReeseEvan_Reese Member Posts: 2,073 PRO
    edited October 2022 Answer ✓
    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.io

Answers

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    Evan_ReeseEvan_Reese Member Posts: 2,073 PRO
    edited October 2022 Answer ✓
    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.io
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    anddy_archeranddy_archer Member Posts: 8 ✭✭
    edited October 2022
    That seems useful and interesting, but I don't know how to enable/disable that :(

    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.
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