Fixing Under-Extrusion on My Bambu Lab P1S 3D Printer (With AMS)

[@martinways2023]

So the real issue was a extruder motor, it gets too hot and cause the clog because extruder gears were too hot and hotend radiator too, filament start to melt before nozzle. It is very often problem in P1S

[@Solid3dMemories]

I was not aware of that issue but it does sound like a plausible explanation, thanks for sharing!

[@genjitsu7448]

In the video he said that before he replaced the motor he replaced the Bowden tubes and the problem disappeared. I did not hear him say that he ever got around to replacing the motors, he just said "I considered replacing the extruder motor, but before doing that I decided to replace all the Bowden tubes..." I am curious why you suspect the motor. Is the motor a known problem with this unit? They are in a heated enclosure which is not the healthiest thing for them so I can definitely believe that could be an issue. Please note that I am asking a sincere question as I am very new to 3D printing and am trying to learn and understand how to get the best results.

[@Solid3dMemories]

@@genjitsu7448 That is a great question. You are right I did not get around to replacing the extruder motor to correct this problem. The reason I was considering replacing the extruder motor was two fold. 1. I also have a P1P that was having extrusions issues after about 4500 hours and the extruder motor did "go bad" and needed to replaced. 2. At that point in time I, after replacing the extruder and the hot end, I could not think of another component that could be failing. The extruder motor did not seem likely based on the results of the test prints which is why I decided to replace all of the Bowden tubes before moving on to the extruder motor. Just FYI, for me, replacing the extruder motor is not fun.

[@WS-gw5ms]

How did the tube get so bad it caused blocking?

[@Solid3dMemories]

I only have theories. 1. The opening in the Bowden tubes was causing enough resistance on the filament to not let it extrude properly. 2. Debris material from the Bowden tube being worn away was being fed into the nozzle causing small clogs. I am not exactly sure which is correct, if either, which is why I only stated what I did to the machine that led to the correction of the under extrusion.