Hi!
I have printed a few prints without any problems for a few weeks now with my new P1S (AMS Combo). I had some heat creep problem in the beginning that went away when opening the enclosure, the community helped me with that and everything was fine.
I haven’t printed anything for about a week and now my printer doesn’t seem to print correctly anymore.
Even small prints look “distorted” and, with the example pictures and other posts, under-extruded. Everything is basically at the default configuration. Black Bambu PLA, default settings from AMS, 0.4 stainless steel nozzle.
Object in slicer:
What gets printed:
Even the prime line is not correct (the first is one of the better ones, for the second test print it almost didn’t print at all):
This is with an open enclosure.
According to the Wiki I found that clogging could be a problem. I tried unclogging the nozzle by using the pin and the “cold pull” method and after a test print it seems to work again but it fails after a few layers again.
I tried unclogging via pin needle, cold pulls, recalibrating flow rate, the hot hex key method, the “extruder maintenance” guide and lubing extruder gears.
What are the next steps? Is this clogging? If it is, why is it clogging all the time?
Thank you very much in advance!
When you cold-pull are you using a contrasting color (white is a good choice…), and does the tip of the pull look “clean”? (really old post from Prusa forums, but images speak better than words):
Can you “unload” and “load” normally? (does it spit out a bit of material as it purges?)
Can you manually extrude at all? (all temps assume PLA):
- set hotend to 220
- once reached, manually extrude using the Handy app or slicer controls…
- listen closely, does it should like it’s binding or grinding?
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Hi @alaorath!
I will try to cold pull with another color later today. I only tried it with the same color so there were not contaminants visible.
Yesterday I tried unclogging methods and printing once again. I noticed that the extruder wheel turns but the filament doesn’t get pulled in consistently, the extruder wheel even skips a bit as if it tries to pull the filament further down but there is some kind of resistance, which again looks like the nozzle is clogged (at least for me as a noob in 3d printing). I tried a few cold pulls and the hexkey method again. This time it seems to have helped a lot more. A test cylinder from Bambu Studio looks like this:
This already looks a lot better, although it doesn’t look as “perfect” as it was before the clogging issues (inconsistent lines at the top, little bit of stringing). I tried printing a bigger model after that:
This at least resembles the real model but also is a bit stringy and doesn’t feel as good as the prints in the beginning. My second test print turned out looking way worse:
My interpretation is that the nozzle gets clogged and once I clean it, gets clogged again and again. I will try cold pulls with another color today.
Thanks for your time!
Another idea is to disassemble the extruder gears and check of flecks or material clogging the extrusion teeth…
