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dimensions moving in drawing

Edward_GoodwinEdward_Goodwin Member Posts: 25 PRO
Hi, I'm trying to us Onshape drawings for the first time. I'm experienced using SW drawings. I have an issue which I'm a bit confused about: 

I've dimensioned various features for a PCB from a datum-point specified to me by the PCB layout engineer I'm working with. All fine so far. However, when I move the view in the drawing, the dimensions shift to a completely different (and seemingly random) datum-point. The dimensions are still there but now are referenced differently and the dimension value correspondingly changes.

What am I doing wrong? 


  • Edward_GoodwinEdward_Goodwin Member Posts: 25 PRO
    It has shifted, actually, to the centre of the PCB where the model origin is. Hmmm. Should I insert / move the origin to the datum-point required? Is it not possible simply to dimension off a different point/line other than the origin? Surely it is!
  • owen_sparksowen_sparks Member, Developers Posts: 2,283 PRO

    Sorry for the dumb question but do you mean "drawings" as in 2D technical drawing with pretty title block generated from a finished part, or "sketch" as in geometry created in a part studio that leads to a feature?

    If the later then I suspect you have unconstrained (blue) geometry that is not moving together as you drag something.  (Use the fix constraint on your datum if so).  If the former then if you can post a link to a public doc I'm sure someone will help out.


    Owen S.
    Production Engineer
    HWM-Water Ltd
  • Edward_GoodwinEdward_Goodwin Member Posts: 25 PRO
    I mean a 2-d technical drawing from which I need to create DXF file to send to a colleague rather than a sketch within a part. I can't, sadly post a public doc as it's confidential... Annoying as it is...

  • owen_sparksowen_sparks Member, Developers Posts: 2,283 PRO

    Sorry but I'm afraid I'm the wrong person to talk about real drawings.  Who's up next?

    Production Engineer
    HWM-Water Ltd
  • Jake_RosenfeldJake_Rosenfeld Moderator, Onshape Employees, Developers Posts: 1,295
    Hi @Edward_12

    Please contact our support team by pressing the "Feedback" button under the "?" menu in your drawing.  They will be able to determine whether what you're seeing is expected behavior or a bug.
    Jake Rosenfeld - Modeling Team
  • brucebartlettbrucebartlett Member, OS Professional, Mentor Posts: 1,854 PRO
    Definitely log feedback, that behavior doesn't sound right. 
    Engineer ı Product Designer ı Onshape Consulting Partner
    Twitter: @onshapetricks  & @babart1977   
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