Bambu Lab X1 PTFE Minimum Radius Guide

prusaprinters

<p>11/11/22 - this model has been updated to a V2, as the V1 version was found in some instances to be making the problem it was designed to solve <i>worse</i> rather than better.<br><br>V2 has a greater radius for the filament, less of a downwards angle out of the end, and a modified swivel mount piece to ensure it remains in place in all bed locations (the old version used to come loose when the hot-end assembly was over the poop chute.<br><br>---------<br><br>Created at the request of Wolf on Air (on the Bambu Lab Discord) who was intermittently having feed errors from the AMS unit.</p><p><br>It seems with some filaments, the small bend that can occur directly above the head assembly can cause too much friction.<br><br>This model is designed to:<br>a) ensure a minimum radius is maintained on this tubing<br>b) support the PTFE to ensure it's straight when entering the top of the the fitting on top of the extruder.<br><br>As an added benefit, this also stops the PTFE tube slapping against the top glass when printing on the right hand side of the bed.<br><br><br>I'd recommend printing in PETG, or similar moderately low friction filament filament with a moderately high glass transistion temperature.<br>0.16mm layers on a 0.4mm nozzle worked well for me with no post-processing (aside from removing the brim from the main part).<br>A brim may also be required on the smaller part if you have poor bed adhesion.<br><br>Best results also come from splitting the parts in the STEP file and printing by object rather than by layer.</p><p>&nbsp;</p><p><strong>Assembly and installation:</strong><br><br>After printing, remove the brim from the main section and press the two parts firmly together.</p><p>Position the hot-end assembly at the centre rear of the machine (over the poop chute is fine), slide the PTFE tube through the guide and insert it into the fitting as normal.<br><br>Next, slide the guide down, and rotate it clockwise (to about the 07:30 position) until it drops down onto the plastic factory support.</p><p>-----</p><p>&nbsp;</p><p><br><br>Public domain - do what you like with this; I hope it's helpful.</p>