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Drive Linkage Simplified — image 1
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Drive Linkage Simplified

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The black drive shaft might drive you nuts if your printer overextrudes a bit. Here are some combined parts.

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Model information

Category
Automotive
License
Creative Commons — Attribution — Noncommercial — NoDerivatives

Not sure how to print the black driveshaft so that parts snap together (using PrusaSlicer). All my square holes shrunk quite a bit leading to much filing of the square pegs. The driveshaft likely could be much simpler and easier to print. I tried to fuse adjoining parts that didn't need to move or rotate to make the driveshaft more reliable.

Combines the driveshaft_5 and driveshaft_6 parts and the driveshaft_2 and _3  for easy printing. It combines 10 separate parts into 4. No supports required for 5,6, but you do need support for 2,3. I used PrusaSlicer's painted on support. You will need some filing after removing supports, but I found these much easier to create and are stronger, since multiple parts are combined into one.