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"True scale" viewing

dan_engererdan_engerer Member Posts: 63 PRO
Hi. As a design engineer, I'm sure we've all had the shocking experience when you prototype a part and the size is dramatically different than what you were expecting. This is a natural part of using CAD if you aren't careful, because being zoomed into a non-perspective model all the time is not exactly realistic. This can result in novice designers creating things which are way too large or way too small. 

Is there a way to view objects on the screen in a "true" scale, meaning the literal size on the screen is what you'd see if you 3D printed the part and laid it right up against your screen? 


  • steve_shubinsteve_shubin Member Posts: 439 ✭✭✭


    You answered your own question. The only thing different you need to do is instead of putting the part up next to the screen, put a ruler up to the screen.

    With one of your 3-D parts showing, use the show dimensions command on one of your sketches and then zoom in or zoom out on that model to where the dimension line in Onshape matches what’s on your ruler.

    If you were working in millimeters and your ruler is inches, then just go and temporarily change the units so that inches will show

  • Paul_J_PremakumarPaul_J_Premakumar Member, Onshape Employees Posts: 174
    @dan_engerer : This isn't possible today. Can you log an improvement request for this, please? In the interim, Steve's suggestion would work, with one caveat : the increments of zoom may not be fine enough to get an exact match.
  • michael_mcclainmichael_mcclain Member Posts: 191 PRO
    Create a shape inside onshape with measurement marks all over it, like a ruler. 3d print or manufacture it and keep it as a desk toy. You can insert that part into your documents to compare sizes of objects to a real life piece.
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