Using a measurement as a parameter

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  S1mon Member Posts: 2,427 PRO

  February 25

  https://cad.onshape.com/help/Content/variable.htm#MeasuredD
  https://cad.onshape.com/help/Content/measure-ps.htm#Add-variable
  

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  rick_randall Member Posts: 117 ✭✭

  February 25

  S1mon said:

  https://cad.onshape.com/help/Content/variable.htm#MeasuredD
  https://cad.onshape.com/help/Content/measure-ps.htm#Add-variable
  

  
  

  Simon is right. Use variables & configurations, this is kind of a deep dive subject - but you won't regret learning about this (this is where all the magic happens).

  Good luck
  

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  eric_pesty Member Posts: 1,552 PRO

  February 25

  Easy to do with a measured variable but how about just extruding "up to point" instead?

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  jumpjack_jumpjack Member Posts: 21 ✭

  February 26

  Why don't I have the icon for creating a variable in the measures panel?!?
  
  
  
  
  Fortunately I found a "measurement to variable" Feature Script.

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  S1mon Member Posts: 2,427 PRO

  February 26

  You need to select two things to get the icon. If you just select a point, it doesn't work (it probably should, but there is a solution). If you select another point or a plane (but not the origin - WTF?) it will work.

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  jumpjack_jumpjack Member Posts: 21 ✭

  February 27

  yes, but I need the absolute coordinate, not a distance or length; I had to draw lines and planes throught the origin to get the coordinates.

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  eric_pesty Member Posts: 1,552 PRO

  February 27

  jumpjack_jumpjack said:

  yes, but I need the absolute coordinate, not a distance or length; I had to draw lines and planes throught the origin to get the coordinates.

  If you measure from something at the origin (seem like you can't use the origin itself for some reason?), then the x, y, z measurement are the same as the absolute coordinates...

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  jumpjack_jumpjack Member Posts: 21 ✭

  February 29

  I got it, but I think it's a bug: if I just click on a point and open measurements panel, its coordinates are shown, but they cannot be associated to a variable; but if I click the point and the origin, same values are shown, but they can be associated to a variable.
  
  
  
  

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  _anton Member, Onshape Employees Posts: 296

  February 29

  jumpjack_jumpjack said:

  I got it, but I think it's a bug: if I just click on a point and open measurements panel, its coordinates are shown, but they cannot be associated to a variable; but if I click the point and the origin, same values are shown, but they can be associated to a variable.
  

  Our variable feature doesn't let you measure world-space positions because they tend to not be useful. If you need them, then it's likely that you're not working idiomatically (to which, of course, there are exceptions). Selecting a point and the origin measures the distance between the two, which is allowed.
  
  Can you just make an offset plane from, e.g., the Top plane, and use that as the up-to entity for an extrude?

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  jumpjack_jumpjack Member Posts: 21 ✭

  March 2

  my model needs a "new origin" : once, after building, connecting and rotating some parts, I determine the position of this new point, I draw a bunch of new parts whose dimensions, orientation and position depend on this new origin.
  It's a Foucault siderostat, very difficult to explain in a few words. 

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