Parametric Z-Axis decoupler "Magnet Wobbler" based on the HevORT design

prusaprinters

<p>This decoupler is meant to reduce Z wobble. It is based on the design from the HevORT as seen in this Video: <a href="https://www.youtube.com/watch?v=mqSQhwqSzvg">https://www.youtube.com/watch?v=mqSQhwqSzvg</a></p> <h3>Print instructions</h3><p>I printed the parts in PETG with a 0.6mm nozzle, 0.24mm layer height, 4 walls, 6 top and 5 bottom layers. But I think any material and settings will work, as long as they are strong enough.</p> <p>I used 10x2mm magnets and steel balls with 4mm diameter.</p> <p>For assembly, first I removed the stringing, then I pressed the magnets in the holes. I used a pipe wrench for this. Then I did the same for the 2 nuts in the magnet_wobbler_gantry_side.stl.</p> <p>I removed the lead screw and the nut. Then I put the lead screw nut in the magnet_wobbler_screw_side.stl from the bottom and secured it with the stock nuts with the feather washers under the screw head.</p> <p>I secured the magnet_wobbler_gantry_side.stl to the gantry with some M3x8 screws using the other 2 feather washers under the screw heads.</p> <p>Then finally I put the balls on the magnet_wobbler_screw_side.stl, stuck it to the magnet_wobbler_gantry_side.stl from the bottom and reinstalled the lead screw.</p> <p>Disclaimer: This introduces some backlash, but it might be worth it if your printer has horrible Z wobble. Grease your leadscrew to minimize friction and thereby possible backlash.</p> <p>To adjsut the model to your needs, you need to edit the magnet_wobbler.fcstd . I created it using realthunders version of FreeCad found here: <a href="https://github.com/realthunder/FreeCAD_assembly3/releases">https://github.com/realthunder/FreeCAD_assembly3/releases</a>, it won't open with the regular 0.19. In the Spreadsheet adjust the magnet_diameter, magnet_height, ball_diameter and support_magnet_stack or other values to your liking. I use the 3D_Printer_Slicer_Individual_Parts Macro, where I altered the Cura path to PrusaSlicer to print the parts.</p>