Community Tip - Learn all about PTC Community Badges. Engage with PTC and see how many you can earn! X
Is it possible to scale an imported part?
Model Tab -> Operations -> Scale Model
Have you tested this on imported geometry? If it worked, please post what version of Creo.
PTC docs explicitly state imported geometry will not get scaled.
I just scaled an imported solid step file to test.
It would seem that the PTC documentation is not accurate, or I am not understanding the definition of imported geometry in the context of the scale model feature.
I am also reading that the OP is attempting to scale a model using an external copy geom feature ("import geom") which is also important as an ECG is not import geometry necessarily.
No, it is not possible to scale imported geometry using the scale model function.
Link to specifications on this:
You can probably use the shrink feature from Pro/mold design to do it, although I have not verified this.
About Applying Shrinkage (ptc.com)
it should be a basic feature
Explain in more detail what you need to do and maybe someone will come up with a work around for your issue. If possible, post the import data and explain how you need to scale it.
We build molds and want to scale the model because of the shirinkage, but also want to keep the model in the orriginal dimensions.
This problem is dealt with using the shrinkage feature I posted earlier. You must have a license for the mold design extension to access this feature. Creo does support this use case but not as a core feature, you must buy the mold design extension to access the shrinkage feature.
If you are not using Creo to design the molds, then the CAD tool you are using to design the molds should have this capability.
In the past I've had to build aluminum molds that were subsequently used to pour urethane parts. The urethane had something like a 5% shrink when cured. So, I had to build the molds with that added size so they'd shrink to nominal.
Unfortunately, unless things are different now, scaling a model is NOT a feature in the model tree. It's a one-time change to all the geometry. The only way to "undo" it is to scale the model again with the reciprocal of the original scale. So, if we found a new formulation of urethane that was going to replace the original one, and it had a different shrink factor, I'd have to apply a new scale to make the model fit the new shrinkage.
In order to save anyone working on the part in the future (maybe even me), I would either put some notes in the relations as comments, documenting the scale factor used and any other pertinent info, or sometimes I'd add an annotation to the part detailing the same information.
The trouble with this, as you might have guessed, is that if the design of the part being molded is changed, the geometry of the mold will not be automatically changed to accommodate the changes. I'd have to re-create the mold, etc.
So, if you can use the Pro/Mold package it's probably a lot easier to handle this stuff, but it is possible to do this kind of thing if you're careful about documenting the transformations you've applied to the various models, too.
@Jan_Venema wrote:
it should be a basic feature
Hi,
you can create your own Unit and your own System of Units and scale model as shown in attached video.
I have scaled imported step files no problem using the scale function. Are we talking about something else? I just tried it with a step model and it scaled perfectly.
that is right but if the feature is extern copy then it doesn't work, also doesn't work with units.