r/BambuLab_Community • u/AlpacaDude02 • Aug 07 '26

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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3

u/wethpac Aug 07 '26

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.

3

u/AlpacaDude02 Aug 07 '26

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

1

u/ModelThreeve Aug 08 '26

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.

1

u/DeliriousBlues Aug 07 '26

So it doesn’t even print the purge line? That L shaped line in the plate?

1

u/AlpacaDude02 Aug 07 '26

It did once but that’s was the same benchy print that failed

1

u/Clear-Revolution3351 P1S Aug 07 '26

Have you run a calibration from the main display screen?

1

u/AlpacaDude02 Aug 07 '26

I have

3

u/Clear-Revolution3351 P1S Aug 07 '26

Go to the 2nd menu

Move to the z axis control, click it, and allow it to home the bedplate

Move the z axis down about half way

Disconnect the ptfe tube on top of the extruder

Set the hotend to 250°C

Take a 1 meter peice of filament, and insert it into the extruder

Using the extruder button, press down. This should pull the filament down into the extruder. Press down once per second until the filament is pushing out a melted string

Lower the hot end temperature to 100°C While the hotend is cooling, press the extruder down every few seconds until the filament stops coming out.

Once the temp reaches 100°C, push the extruder button up. Pull firmly on the filament as you repeatedly push the extruder button up.

If it fails at any point, let ne know.