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Scaling a sketch without scaling the offset values

Hi all,

I am trying to find a solution to the following problem.
I do cookie cutters, and in my designs I always like to draw different sizes of the cutter in 1 sketch. The thing, when I draw the first size, and I apply the offsets to create the walls of cutters, then I can't scale the whole thing to create a new size since I would also be scaling the thickness of the walls. Is there any workaround here?

As of now, I create the outline of my cookie cutter, then I re-scale it to a few sizes, and then I apply offsets on each one. This can be really time consuming if there are many lines or details, that is why I would like to apply the offsets once and scale the whole thing to a new size without losing the offset value.

I rarely have fully constrained sketches (I usually draw on top of a picture with splines and so on), so it is usually also a problem for me if, for example, I apply a 1mm offset and then I decide to make it 2mm, then all my geometry deforms since it was not fully constrained, so that is not a thing that I could do either.

Thanks in advance!

Best Answer

  • NeilCookeNeilCooke Moderator, Onshape Employees Posts: 5,688
    Answer ✓
    OK, close. Extrude as a surface, then scale, then Thicken.
    Senior Director, Technical Services, EMEAI

Answers

  • NeilCookeNeilCooke Moderator, Onshape Employees Posts: 5,688
    Simple - create one sketch of the outline. Then use the extrude/thin feature and then Transform/scale.
    Senior Director, Technical Services, EMEAI
  • rafael_montserratrafael_montserrat Member Posts: 5
    NeilCooke said:
    Simple - create one sketch of the outline. Then use the extrude/thin feature and then Transform/scale.
    I've just tried doing that, but the scaled part had a thicker wall thickness than the original one. I had a thin extrude of 0.4, I scaled the part by 1.28 and then after scaling my part had a wall thickness of around 0.512... I need to "grow" the size of the part without affecting the thickness of the wall... Maybe I just did not understand what you meant tho
  • NeilCookeNeilCooke Moderator, Onshape Employees Posts: 5,688
    Answer ✓
    OK, close. Extrude as a surface, then scale, then Thicken.
    Senior Director, Technical Services, EMEAI
  • rafael_montserratrafael_montserrat Member Posts: 5
    NeilCooke said:
    OK, close. Extrude as a surface, then scale, then Thicken.
    Ok that seems to work. Although the whole workflow is not as much better as I thought it would be. In my perfect scenario I would use the transform feature on a sketch and the offset would stay constant, but I'm pretty sure it is not possible. Anyways, thanks a lot for the help! :)
  • NeilCookeNeilCooke Moderator, Onshape Employees Posts: 5,688
    Erm, no. You're welcome.
    Senior Director, Technical Services, EMEAI
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