oldham Z coupler for RepRap with downside z motors
pinshape
Summary: Watch the video at http://www.youtube.com/watch?v=Bc-pEWRrJsc&feature=youtu.be. This coupler will correct small or large alignment errors between the threaded rods and motor shaft by moving its middle piece, and it works even if the rod is 5mm off-center. A photo of the printed item will be posted soon. Instructions: Print all three files - 5mm, 8mm, and middle part - to create one coupler. Adjust the parts as needed with a sharp object to ensure they fit and slide smoothly together. Holes have been left for small 2.5mm wood screws if your printed part is weak or you need extra stability. Add grease between each part and assemble it securely.
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