MMU2S Extruder Chimney and Adaptor Mod

prusaprinters

<p>I had reliability problems using the stock extruder parts with filaments not being detected.<br><br>Having looked at the parts supplied it just cannot handle the variation in filament diameters that occur.<br>&nbsp;</p><p>To improve this I increased the length of the arm which increases the tolerance.</p><p>I found it easier to setup a position that works and was able to get Prusament PLA with PrimaSelect PVA+ support material working with stock soluble interface settings straight away.</p><p>Printed in Prusament PETG - Black</p><p>Stock print settings 0.20mm QUALITY<br><br>The Adaptor-Printer-MMU2S</p><p>At the junctions of the adaptor the stock design has sharp shoulders and wrong diameter which creates features where incoming filament can get stuck causing miss loads.</p><p>The MMU2S selector then cuts the filament square and gets stuck again and again.</p><p><br>Below shows the modified lead in / lead out to relieve this issue.<br>&nbsp;</p><figure class="image image-style-align-center image_resized" style="width:45.65%;"><img src="https://media.prusaprinters.org/media/prints/122152/rich_content/69e5cdf2-ac66-4642-b2f9-a423d0223dbc/adaptor-printer-mmu2s-filament-leadin_modified.jpg#%7B%22uuid%22%3A%22becc4ce4-f6a5-4fb9-ac0e-648fc0fd7d77%22%2C%22w%22%3A840%2C%22h%22%3A1101%7D"></figure><p><br>As I wanted to minimise producing steps in the feed route I printed this part with adaptive layering set at best quality, it only takes a little extra time to print but produced a smoother result.</p><p>No Supports</p><p>See photos for bed orientation.<br><br>Hope this works for others.<br>&nbsp;</p>