Sherpa Micro for BearEXXA

prusaprinters

<p>I was always kind of upset with how heavy the stock MK3S+ and Bear toolheads were, so I decided to modify a friend's Orbiter mount to work with the amazing Annex Engineering Sherpa Micro extruder (link to github/BOM below). The stock Bear extruder printed in full ASA with the DeltaP duct/mount and a Dragon ST is ~528g. This toolhead mod cuts that to ~306g with the same configuration of parts. That's roughly 222g in weight savings! In my testing (with Klipper firmware), I was able to go from a max of around 1.2kmm/s^2 of accel with the bear to over 5kmm/s^2 of accel with zero ringing whatsoever!</p><p>&nbsp;</p><p>Huge shoutout to KenadyDwag44 for the original Orbiter mount design! Any and all feedback is welcome! If you have any questions, feel free to hit me up on Discord: Solar#9135</p><p><strong>EXTRUDER CURRENTS:</strong> If you use this extruder with stock Prusa firmware, be sure to change both of the extruder current values at the bottom of your start gcode in your slicer to 400. The extruder motor will run hot, but that is normal. Be sure to calibrate your esteps!</p><p>Also pictured in the render is my BearEXXA DeltaP V2 remix to accommodate rigid mounting a TriangleLab or Phaetus Dragon hotend! <a href="https://www.prusaprinters.org/prints/90925-bearexxa-delta-p-v2-r2-for-dragon-hotend">https://www.prusaprinters.org/prints/90925-bearexxa-delta-p-v2-r2-for-dragon-hotend</a></p><p>&nbsp;</p><p><strong>NOTE:</strong> This design does use heat set inserts and will only fit the BearEXXA carriage. You will need 3x5x4mm inserts. I recommend picking up this pack of 100 from Fabreeko: <a href="https://www.fabreeko.com/products/threaded-heat-inserts-m3x5x4-100pc-per-bag?_pos=1&amp;_sid=7bdbd9c70&amp;_ss=r">https://www.fabreeko.com/products/threaded-heat-inserts-m3x5x4-100pc-per-bag?_pos=1&amp;_sid=7bdbd9c70&amp;_ss=r</a> Also, you'll need 2x M3x45 SHCS. All other mounting hardware should be the same as stock Bear</p><p>&nbsp;</p><p>Print at 0.2mm LH in ABS/ASA/PETG/HTPET+/PC or similar with no supports. 4 walls, at least 4 top/bottom layers, at least 25% infill (cubic, triangle, gyroid recommended). Scale the parts for accordingly for the material being used (i.e. +0.5% for ABS/ASA). Printing orientation is shown in the pictures.</p><p>&nbsp;</p><p>BearEXXA: <a href="https://www.thingiverse.com/thing:4362586">https://www.thingiverse.com/thing:4362586</a></p><p>&nbsp;</p><p>Annex Engineering Sherpa Micro: <a href="https://github.com/Annex-Engineering/Sherpa_Micro-Extruder">Annex-Engineering/Sherpa_Micro-Extruder: a more compact version of sherpa mini (github.com)</a></p>