Sunday, September 11, 2011

Z-Coupling Upgrade

Testing the z-axis revealed that the z-couplings have a bad habit of letting the motor shaft slip from them over time resulting in the threaded rod dropping from positions.

If I had a working printer handy I would have used Prusa Z-Coupling modification by Nophead but instead opted for the low cost lead-screw variant by Keegi since the hardware store was more accessible at this point.

Vinyl tubing and a coupling nut

I used a lock washer and hex nut to keep the coupling in place so it didn't unscrew itself from the threaded rod.

The lock washer between the two nuts keeps enough tension/friction so the coupling wont unscrew itself

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