How to scale down AND maintain clearances between parts for print-in-place models?
 
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How to scale down AND maintain clearances between parts for print-in-place models?  

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Robin
(@robin-2)
Trusted Member
How to scale down AND maintain clearances between parts for print-in-place models?

Hello,

I'm trying to scale down this gear bearing https://www.prusaprinters.org/prints/114535-perfect-gear-bearing however, the clearances between the gears seem to be scaling down also, which is causing the parts to stick together.

Is there a way to scale down in prusa slicer or otherwise, and maintain clearances between parts so they remain unconnected?

Best Answer by Sp4rkR4t:

Scaling a STL will always scales all aspects of this, thankfully this STL is the same sort of gear I use often, a while back I found a scad file for making these to suit our needs, I've attached the file in this post, just open in openSCAD and on the right hand side select the parameters you need.

Posted : 15/01/2022 9:09 pm
Sp4rkR4t
(@sp4rkr4t)
Estimable Member
RE: How to scale down AND maintain clearances between parts for print-in-place models?

Scaling a STL will always scales all aspects of this, thankfully this STL is the same sort of gear I use often, a while back I found a scad file for making these to suit our needs, I've attached the file in this post, just open in openSCAD and on the right hand side select the parameters you need.

Posted : 15/01/2022 9:34 pm
Robin liked
sylviatrilling
(@sylviatrilling)
Honorable Member
RE: How to scale down AND maintain clearances between parts for print-in-place models?

In PrusaSlicer you can use a negative xy compensation to increase the clearance.

Mk3S+,SL1S

Posted : 15/01/2022 10:07 pm
FoxRun3D
(@foxrun3d)
Famed Member
RE: How to scale down AND maintain clearances between parts for print-in-place models?

Scaling up is usually a good strategy to get more clearance but scaling down not so much. Playing with XY compensation may work but then again it will affect the whole model, just like scaling but only in the xy plane. If you have access to a tool such as Fusion you can load the model and push the faces back that form the gears.

Formerly known on this forum as @fuchsr -- until all hell broke loose with the forum software...

Posted : 16/01/2022 2:58 am
Robin
(@robin-2)
Trusted Member
Topic starter answered:
RE: How to scale down AND maintain clearances between parts for print-in-place models?

Thanks, I suspected there was no way to maintain gap tolerances.  I had found the scad from thingiverse and started tinkering with it.  It may work out.  Thanks for suggesting!

Posted : 16/01/2022 4:01 am
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