Hi Guys, everyone. I have a Bambu A1 and I’m having an issue with it that is probably simple, but due to my limited experience, I haven’t found the solution yet.
I’m printing with PETG — I’ve always used this brand and it has printed beautifully without any problems. However, today I was printing a hydroponic tower, and the printer seems to clog at the same layer every time, as you can see in the video.
It feels like when the print requires frequent retractions and extrusion in quick succession, the printer seems to clog at a certain point. The filament isn’t being pulled back, but I also don’t hear any typical clogging noise.
What have I done so far? I open the hotend, remove the filament (which comes out easily), pull everything out, feed the filament back in, and restart the print. It starts printing fine again, but when it gets to the same area — the part of the vase with the holes — it starts retracting and printing more quickly or more abruptly, and then… the issue comes back.
I’m using the Generic PETG profile, with properly calibrated temperature and flow. Where else should I make adjustments to avoid this issue? Could it be something related to retraction or should I slow down the speed?
All settings are on default.
Video: Watch VID_20250515_125940 | Streamable
Update last night:
I reduce retract speed to 25 and change retract lenght to 1.2. Then i reduce in half all speed settings. The result, was a bit better, it passes that critical layers of making the holes of the planter…but this is a printing of 18h, and after i wake up today, he stops extruder somewhere again.
Photo: 1747469995701 1 — Postimages