MMU2S Extruder Filament Sensor Micro Adjuster

prusaprinters

<p>Update: This part was recently changed. &nbsp;If your extruder was manufactured after February 2021, you should use the 2021 version. &nbsp;Earlier printers will have to use the other.</p><p>I found it very difficult to set the very sensitive extruder filament sensor for the MMU2S multi-material accessory. I would get it set perfectly but as soon as I tightened the bolts it would be off. &nbsp;Shifting it the tiny amount needed to compensate for this movement was very difficult. This is a modification of the OEM part which simply adds a slot for a square nut and 20mm screw. This allows you to set the alignment very consistently. If you need to adjust, you just loosen the bolts turn the screw a half turn in the desired direction, snug it up, and re-tighten. It made a world of difference for me. &nbsp;It is also very easy to install on a stock printer - only three screws to remove to replace the original part.</p><p>I also elongated the slots a little to give more room to adjust for any drift that may happen over time.</p><p>&nbsp;</p><p>P.S. If you are having difficulties with consistent FS operation, you might want to consider this other mod:</p><p><a href="https://www.prusaprinters.org/prints/5426-reinforced-mmu2s-extruder-idler">https://www.prusaprinters.org/prints/5426-reinforced-mmu2s-extruder-idler</a></p><p>&nbsp;</p>