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ptc-32743241-Visitor
1-Visitor
March 29, 2013
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Scaling an Assembly

  • March 29, 2013
  • 7 replies
  • 30277 views

Hello all and thank you ahead of time for any responses.

I downloaded an assembly from grabcad as a step file, imported it into CREO 2, and then attempted to scale the model and it is not scaling. I clicked "Operations", "Scale Model" then entered a value of 0.66 because the length is 18 and I would like it around 12. The system prompts me to accept the scaling and regeneration to which I click OK, and in the bottom left of the screen it says "rescaling dimension", but nothing ever happens and the models dimensions stay the same. The model has about 40 parts, my PC is Core i5, and I have given it over a half hour to process but nothing. Any suggestions?

Thanks

Tom


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Best answer by cgorni

To close this community thread on Scaling an Assembly

 

Summary of the exchanges and list of solutions:

  • Scaling the model in Assembly mode will only impact the items and dimensions generated at this level (offset datums, component placement, assembly cuts, etc).
  • Component geometry can only be scaled at Part level and several commands / options exist (if you have the required licenses), see also CS31500:
    • Model > Operations > Scale Model
    • File > Prepare > Model Properties > Shrinkage (Change) > By Scaling (with appropriate negative value)
    • Model > Editing > Warp > Transform (or Stretch for a single direction)
  • Alternate methods to perform the operation on the whole assembly:
    • You could create your own Unit and associated System of Units to convert the assembly and its sub models with the required factor, then switch back to the original units interpreting the dimensions (File > Prepare > Model Properties > Units (Change).
    • If not interested by the structure itself, you may export / import back the assembly as IGES / STEP to a single part, then scale the model.
      • For the STEP format you may need to set the hidden config option intf3d_in_as_part to yes, as indicated in this post

7 replies

T
TomD.inPDX17-Peridot
17-Peridot
March 29, 2013

I am not familiar enough with the straight forward way to scale import models. However, I do know you can trick the imported parts by using the Units settings in File>Prepare>Model Properties>Units. You can make a new unit as .66 or 2/3 if you want more accuracy. Now create a new System of Units to include your new units. When you change your part to this new unit system setting, you have the option of scaling the model units. once this is done, you can revert back to your desired units by using the other conversion method.

A little effort will get you want you need. It is the only way I know to fool Creo to get what you want.

    J
    JamesAvis14-Alexandrite
    14-Alexandrite
    July 6, 2015

    According to the documentation, imported geometry cannot be scaled using the scale tool.

    Chris3
    Chris321-Topaz I
    21-Topaz I
    July 7, 2015

    You can only scale parts, not assemblies

    G
    gkoch1-Visitor
    1-Visitor
    July 17, 2015

    Interesting!

    If I use Model > Operations > Scale Model, I can scale even imports (tested with a cube in STEP format imported into part mode)

    Assemblies can also be scaled, but this affects only assembly geometry and dimensions (e.g. offsets) and not the components in the assembly - which makes it pretty useless for imported assemblies. You will have to scale component by component.

    The two alternate methods (if you have the required licenses) are also applicable for part modus only:

    • File > Prepare > Shrinkage (Change) > By Scaling (with appropriate negative value)
    • Model > Editing > Warp > Transform (or Stretch for a single direction)
      S
      SandeepKadam0714-Alexandrite
      14-Alexandrite
      June 14, 2016

      Dear Thomas,

      It is possible to scale imported model with scale command. I tried with Imported JT file and It works well

      Sandeep K

      S
      sm_011-Visitor
      1-Visitor
      October 28, 2016

      So if I have an imported STEP assembly, the only way to scale it is to modify the scale of all the parts individually and reassemble them?

      I see lots of responses on how to scale the model, which works fine. The problem is once you scale all the individual components, they are no longer in the right place in the assembly and need to be put in the right place. Okay for a small assembly, but unbearable for a large assembly.

      S
      23-Emerald III
      StephenW23-Emerald III
      23-Emerald III
      October 28, 2016

      Look at this post... Assembly model scale  I think you can make it work using a units conversion.

      S
      sm_011-Visitor
      1-Visitor
      October 28, 2016

      I tried it and my imported geometry did not change in size. Maybe I did not do it correctly. I'll give it another shot.

      C
      cgorni16-PearlAnswer
      16-Pearl
      December 22, 2021

      To close this community thread on Scaling an Assembly

       

      Summary of the exchanges and list of solutions:

      • Scaling the model in Assembly mode will only impact the items and dimensions generated at this level (offset datums, component placement, assembly cuts, etc).
      • Component geometry can only be scaled at Part level and several commands / options exist (if you have the required licenses), see also CS31500:
        • Model > Operations > Scale Model
        • File > Prepare > Model Properties > Shrinkage (Change) > By Scaling (with appropriate negative value)
        • Model > Editing > Warp > Transform (or Stretch for a single direction)
      • Alternate methods to perform the operation on the whole assembly:
        • You could create your own Unit and associated System of Units to convert the assembly and its sub models with the required factor, then switch back to the original units interpreting the dimensions (File > Prepare > Model Properties > Units (Change).
        • If not interested by the structure itself, you may export / import back the assembly as IGES / STEP to a single part, then scale the model.
          • For the STEP format you may need to set the hidden config option intf3d_in_as_part to yes, as indicated in this post
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