Prusa i3 MK3S Y axis motor mount

prusaprinters

<p>Beefed up Y-axis motor mount for the i3 MK3S with built-in end stop.</p><p>The advantage of this design is that the linear bearings won't hit the backplate of the frame anymore to mark the back end of the Y axis. Instead, the belt holder under the Y carriage will hit the "STOP" part of the Y motor mount which puts less stress on the bearings.</p><p><i>Please post a Make of this print if you liked it and it was useful to you. Thank you!</i></p><h3>Updates</h3><p>2022-03-30: IMPORTANT - Some people still encounter Y-axis length calibration issues using this mount. If you do, please read this <a href="https://www.printables.com/model/37659-prusa-i3-mk3s-y-axis-motor-mount/comments#comment-193529">comment</a> and all the answers by Shushuda. This might help resolve your issues.</p><p>2022-01-24: Upon request I added a .step and an .stl of a version in which I shaved off 1mm of the end stop (the part labeled “STOP” that the Y-carriage's belt tensioner hits). This is for people having Y-axis calibration issues with the normal version.</p><h3>Nuts and bolts needed</h3><h4>Motor to mount</h4><p>1x M3 x 10 (reuse from stock)<br>2x M3 x 25</p><h4>Frame to mount</h4><p>1x M3 x 10 (reuse from stock, upper hole)<br>1x M3 x 12 or 14 (lower hole)<br>2x M3 lock nuts (reuse from stock)</p><h3>Print instructions</h3><p>Recommended material: PETG or ABS.<br>Print with 3 perimeters and at least 30% gyroid infill.</p><p>Please note: If you end up with your pulley situated all the way to the left and the belt still rubs on the rim of the pulley, you can slice a 1mm part of the bottom of the holder to create a spacer / shim to put between the motor and the rest of the mount. (It's included this way in the 3mf file). Thanks to Ulrich Hornstone ( <a href="https://www.prusaprinters.org/de/social/58726-ulrich-hornstone">https://www.prusaprinters.org/de/social/58726-ulrich-hornstone</a> ) for this idea.</p><h3>Compatibility</h3><p>This mod also works well with KalleKnall's Y axis linear rails upgrade: <a href="https://www.prusaprinters.org/de/prints/5620">https://www.prusaprinters.org/de/prints/5620</a></p><h3>Remix</h3><p>This design is based on teookie's design for the MK3 ( <a href="https://www.prusaprinters.org/de/prints/1063-prusa-i3-mk3-y-axis-motor-mount">https://www.prusaprinters.org/de/prints/1063-prusa-i3-mk3-y-axis-motor-mount</a> )<br>Compared to the MK3 design the "STOP" plate on the top is located 1.5mm further back to avoid calibration issues on the MK3S.</p>