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Undefined when tangent and vertical contraint on box

brent_stratford
brent_stratford Member Posts: 2 ✭
in Community Support

So I ran into a problem where I am trying to sketch a rectangle that is tangent to a cylinder. The rectangle has normal rectangle constraints and is fully dimensioned. The lines are constrained to be vertical and one side is constrained to be tangent. The vertical lines show as black (fully defined) while the horizontal lines show as blue (not fully defined). How can this be?

image.png

I eventually just gave up and used the "Fix" constraint but it seems like onshape should be able to figure out that rectangle with vertical and tangent constraints should be fully defined.

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Answers

  • eric_pesty
    eric_pesty Member, pcbaevp Posts: 2,935 PRO

    Nothing you describe constrains the vertical position of your rectangle, so the top and bottom edges can slide up and down… To see what's missing just drag any of the blue entities to see how they move.

    I would add a midpoint relation between the end of your construction line and the vertical edge of the rectangel.

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