u/Gameknight091025

I print pla at 220°C and I have that inconsistent extrusion issue. I have no idea why... Can you help me know why ?

I'm using an ender 3 pro slightly modified, and running klipper.

I sliced it in orca slicer.

It is my ender 3 pro. I have an all metal hotend with direct drive, and it worked completely fine. I wanted to change my nozzle for a CHT one, to get more flow, and then it started doing it. I thought that the nozzle was clogged, so i tried two different ones, and none works now. I also thought about a clog higher in the hotend, so i completely dissassembled it. It is fully cleaned now, but still does that. I have a slim nema17 pancake motor, and i don't know if that could also be a source or problem... This was with PLA at 220°C, but it also happens with PETG. And here, ou see it at 15mm/s of extrusion, but it also does it when at 10 or even 5mm/s.

I’m pretty new to 3D printing and recently got an Ender 3 Pro from a friend. At first it had under-extrusion issues, which I fixed by moving the spool holder to the top-left of the printer to reduce tension on the extruder. I also calibrated the e-steps, and after that it printed fine.

Then I installed Klipper using MainsailOS on a Raspberry Pi 3 and flashed the firmware successfully. When I tried printing a calibration cube, the X-axis switch wasn’t triggering correctly. I discovered the entire X-axis assembly had been mounted backwards, so I disassembled and remounted it properly.

After that, I printed another calibration cube and it came out mostly fine except for some corner bulging. I started looking into Pressure Advance calibration, but saw that Input Shaping should be calibrated first. After trying that, print quality became extremely bad. I tried multiple times with similar results.

I then tried calibrating PA without Input Shaping, but it got even worse. Later I found the nozzle was clogged, so I replaced it, cleaned the hotend, and replaced the PTFE tube.

After that I printed two calibration cubes:

• 80 mm/s → very poor quality
• 65 mm/s → slightly better, but still bad

At this point I’m not sure what to troubleshoot next. Does anyone have ideas what could be causing this or what I should check next?

All of those things where printed on the same pla spool from polymaker, and same temp (200°C for the nozzle and 60°C for the bed).

For the settings, i've added all of them in the pictures.

All my file were sliced in the Ultimaker Cura slicer

I’m pretty new to 3D printing and recently got an Ender 3 Pro from a friend. At first it had under-extrusion issues, which I fixed by moving the spool holder to the top-left of the printer to reduce tension on the extruder. I also calibrated the e-steps, and after that it printed fine.

Then I installed Klipper using MainsailOS on a Raspberry Pi 3 and flashed the firmware successfully. When I tried printing a calibration cube, the X-axis switch wasn’t triggering correctly. I discovered the entire X-axis assembly had been mounted backwards, so I disassembled and remounted it properly.

After that, I printed another calibration cube and it came out mostly fine except for some corner bulging. I started looking into Pressure Advance calibration, but saw that Input Shaping should be calibrated first. After trying that, print quality became extremely bad. I tried multiple times with similar results.

I then tried calibrating PA without Input Shaping, but it got even worse. Later I found the nozzle was clogged, so I replaced it, cleaned the hotend, and replaced the PTFE tube.

After that I printed two calibration cubes:

• 80 mm/s → very poor quality
• 65 mm/s → slightly better, but still bad

At this point I’m not sure what to troubleshoot next. Does anyone have ideas what could be causing this or what I should check next?

All of those things where printed on the same spool and same temp.

All my file were sliced in the Ultimaker Cura slicer

I’m pretty new to 3D printing and recently got an Ender 3 Pro from a friend. At first it had under-extrusion issues, which I fixed by moving the spool holder to the top-left of the printer to reduce tension on the extruder. I also calibrated the e-steps, and after that it printed fine.

Then I installed Klipper using MainsailOS on a Raspberry Pi 3 and flashed the firmware successfully. When I tried printing a calibration cube, the X-axis switch wasn’t triggering correctly. I discovered the entire X-axis assembly had been mounted backwards, so I disassembled and remounted it properly.

After that, I printed another calibration cube and it came out mostly fine except for some corner bulging. I started looking into Pressure Advance calibration, but saw that Input Shaping should be calibrated first. After trying that, print quality became extremely bad. I tried multiple times with similar results.

I then tried calibrating PA without Input Shaping, but it got even worse. Later I found the nozzle was clogged, so I replaced it, cleaned the hotend, and replaced the PTFE tube.

After that I printed two calibration cubes:

• 80 mm/s → very poor quality
• 65 mm/s → slightly better, but still bad

At this point I’m not sure what to troubleshoot next. Does anyone have ideas what could be causing this or what I should check next?

All of those things where printed on the same spool and same temp.

I’m pretty new to 3D printing and recently got an Ender 3 Pro from a friend. At first it had under-extrusion issues, which I fixed by moving the spool holder to the top-left of the printer to reduce tension on the extruder. I also calibrated the e-steps, and after that it printed fine.

Then I installed Klipper using MainsailOS on a Raspberry Pi 3 and flashed the firmware successfully. When I tried printing a calibration cube, the X-axis switch wasn’t triggering correctly. I discovered the entire X-axis assembly had been mounted backwards, so I disassembled and remounted it properly.

After that, I printed another calibration cube and it came out mostly fine except for some corner bulging. I started looking into Pressure Advance calibration, but saw that Input Shaping should be calibrated first. After trying that, print quality became extremely bad. I tried multiple times with similar results.

I then tried calibrating PA without Input Shaping, but it got even worse. Later I found the nozzle was clogged, so I replaced it, cleaned the hotend, and replaced the PTFE tube.

After that I printed two calibration cubes:

• 80 mm/s → very poor quality
• 65 mm/s → slightly better, but still bad

At this point I’m not sure what to troubleshoot next. Does anyone have ideas what could be causing this or what I should check next?

All of those things where printed on the same spool and same temp.