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A better Internal and External Gear generator script with Profil shifting

A better Internal and External Gear generator script with Profil shifting v1.3

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I made a script for Alibre that generates mathematically accurate internal and external gears. Unlike the example script, it uses a true trochoid (undercut shape) and an involute profile.
To keep things simple, the script creates (or replaces) a sketch and produces a single tooth.

Additionally, the script supports profile shifting (a technique commonly used to avoid undercutting).
1757336944702.png

I’ll continue updating the script, mainly to add variable support (for easier sketch modification and integration with child features), as well as bug fixes.

All the resources are available in the GitHub repository ( linked as resource information URL)
In the repository, you can also find visualization and debugging tools.

External gear generated by the script:
1757336542100.png

Internal gear generated by the script:
1757336886898.png

If you have a moment to comment or leave a review, I’d really appreciate it! I’ve put a lot of time into this project, and I’d love for it not to get buried in the forum eheh.
gear_profile_shift_animation.gif
Author
Eymeric
Downloads
23
Views
765
First release
Last update

Ratings

4.50 star(s) 2 ratings

Latest updates

  1. Center tooth profile on X axis

    Added rotation of both profile at generation to center them on X axis. Useful for alignment with...
  2. Bug fixes : small edge in the case of high number of teeth for internal gear

    Added two lower arc at the dedundom of the teeth of internal gear instead of one in order to not...

Latest reviews

I'm not reviewing the gears. The codebase structuring made it easy to turn into an addon. It was written using modern Python tooling.
https://www.alibre.com/forum/index.php?threads/eymeric65-py-gear-add-on-alibre-script-based.26228/
https://github.com/the-tool-store/alibre-py-gear-addon
Thankyou for your efforts.
This would be better for drawings if either the tooth tip or the root was centred on the X axis as a) its easier to dimension and b) keyways are often aligned to teeth.
Eymeric
Eymeric
Okay I will update accordingly ^^ nice comment.
Update : done
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