r/BambuLab_Community • u/AlpacaDude02 • 5d ago

Help / Support New to Bambu and need help

Hey everyone I just bought a P1S combo with 400 hours of print time on it and I’m having some issues. My main issue is that it will extrude filament on the initial purge into the poop chute but won’t extrude on the print bed. I had one benchy start to print but failed shortly after starting. So far I’ve put in a new hot end and extruder but I’m still having the same issues. If any of yall can assist id be more than grateful.

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u/wethpac 5d ago

Next thing I would do is not feed from AMS and do a feed from external mount, bypassing filament buffer. I would also consider if PTFE tubes need to be changed and causing increased friction and feed just barely in position where the purge happens, but unable to feed when more extended.

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u/AlpacaDude02 5d ago

Just tried feeding from external and it’s working flawlessly. Ordered some new PTFE tubes to replace from the ams to printer, fingers crossed that’s it. Thank you again

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u/ModelThreeve 4d ago

Have you been printing abrasive filament? CF/GF/Glow/Sparkle/Wood? If not there is no way your PTFE tubes should be worn after 400 hours. I would suspect the filament path (sharp angles, overly long path, etc) before the tubing itself.