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Added auto generated 3D models for varistors

KiCad Bot requested to merge github/fork/Misca1234/Varistor into master

Created by: Misca1234

This push consist of 97 3D models for Varistor foot prints.

The ordinary cq_parameters.py was created and been updated by a separate script so all 3D models can be recreated.

The models are auto generated with help of a script

A script first find missing 3D models based on the parameter model in the foot print file. Then it extract the size , pitch and perhaps an epad from the foot print file name. After that it extract the description and the pads from within the foot print file and finally add entries to the cq_parameter file.

It will assume some parameters such as the height and distance from pcb to body.

I guess we have to trust the models and change those which we discover later that are wrong. Can not expect to review all 97.

3D model push https://github.com/KiCad/kicad-packages3D/pull/463

3D model script push https://github.com/easyw/kicad-3d-models-in-freecad/pull/226

Here is a couple examples of the generated models (they all have same shape)

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Thanks for creating a pull request to contribute to the KiCad libraries! To speed up integration of your PR, please check the following items as you complete them:

  • A screenshot of the model(s) aligned with KiCad footprints is very useful
  • Was the 3D model(s) created in a mechanical modelling program?
  • Source files (or scripts) have been contributed
  • Step model submitted in 1:1 scale
  • WRL model submitted in 1:2.54 scale
  • 3D model alignment checked against KiCad footprint
  • WRL model uses correct material properties
  • Geometry check performed against mechanical models

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