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I was having trouble getting the smaller gears to print because of the overhang. I used OpenSCAD to fill in the bottom of the hole on each gear so that there was a clean bridge. I left enough of the hole to act as a guide for the drill. The scad files are created demonstrating how to do this.
The import feature in OpenSCAD provides a convenient way to make simple additions and deletions to an existing part if the only thing you have is the STL file.
Print the v2 versions of the gears, then use a 3mm drill (ideally held in a pin vice) to clean out the hole.
Functional Differential Gear System by RonG is licensed under the Creative Commons - Attribution - Share Alike license.
So what's this mean?
We're sure RonG would love to see what you've printed - take a photo and share it on Thingiverse as a Make.
To post a Make simply visit this Thing again and click I Made One to start uploading your photo. You can also download the Thingiverse Mobile app (available via Google Play and Apple App Store) to take a photo and upload your Make right from the app!