I have been having issues with my P1S for a while. While tinkering things have been improving, the print quality has been spotty during the print. The tree supports break during the printing process. It should be noted that I am using in these photos pet-cf after drying the filament for 6 hrs at 90C…

You clearly have a flow issue. If you aren’t using a known good profile for your specific filament, get one and use it. If you haven’t done flow calibration and pressure advance (in that order) for this filament, you should do it.

For context, previous topics - it’s still the same problem: [image] Filament sticking to nozzle P1S Troubleshooting I have been having this issue recently with my P1S after getting a new hotend (phaetus conch plus). The first few prints were fine, but there i…

That white calibration cube is pretty bad. Imo youve got a mechanical problem, in the extruder or heater or nozzle. If you have spares of any of those on hand, nows the time (imo). Depending how old the printer is, support might be of help in getting some parts sent.

Currently I have 1 stainless steel 0.4 nozzle (stock), 1 hardened steel 0.4 nozzle (the one I’m currently using because of the carbon fibers), 1 hardened steel 0.6 nozzle, and one Phaetus Conch Plus 0.4 nozzle (worked in begining but had issues and switched back).

[image] Bullocks: Depending how old the printer is, support might be of help in getting some parts sent. Actually, support is already involved… :+1: [image] Filament sticking to nozzle P1S They haven’t responded to my further updates in the last two days as I am still having these issues. …

I am still in communication with Bambu Labs for this, switched from a 0.4 to a 0.6 amd still having issues. I am starting to suspect that the extruder might be part of the problem, given the detritus that I had to clean from the inside. [20260903_175145] [20260903_175142] [20260903_154020] […

[image] MrMushroom: I am starting to suspect that the extruder might be part of the problem, given the detritus that I had to clean from the inside. So, just to gently point it out with a big friendly smile: this is basically exactly what was already recommended to you back in your first thre…

I did get the panda claw as the first upgrade when I got my printer, the gears still look fine though it may need replaced. I am also considering if the panda metal extruder would help too.

Update: The new extruder and gears came in, I have been testing the prints with PLA, so far they are turing out good. I haven’t yet tried any of the carbon fiber filaments, so we’ll have to see on that. Wanted to ask about the prints. From the sides the calibration cube turned out great, but the top…

Tree supports breaking during print P1S

Bambu Lab P Series Troubleshooting

RetroSharky August 29, 2026, 9:33pm 3

For context, previous topics - it’s still the same problem:

Just for information: if someone wants to help, they should read the old threads first for context. This allows users to get an overview of the entire troubleshooting process done so far.

Just a friendly suggestion: More topics doesn’t mean more help, because people are missing important information about everything you’ve already done.