I am still troubleshooting this issue but I was wondering have anyone having trouble with the Bambu PLA Galaxy filament getting stuck in the extruder (P1S)?
I had to open up the extruder each time to clean it up (twice so far). I never had any other filament doing this so I am still trying to figure out if my extruder is worn out (hardened) or the glass particles from the filament are causing issues (will do some testing).
The first time I open the extruder there was some sort of fine powder all over the gears/rollers (same color as the galaxy filament) and the âtension rollerâ was stiff and would not spin at all, I had to dip the whole thing in iso alcohol then lots of dark stuff came out and it started to move smoothly again. The second time time I cleaned up it wasnât as bad but the roller wasnât roller as smooth until i cleaned using iso.
It is difficult, if not impossible, to print filled fiament with a 0.4 nozzle. You need at least 0.6 hardened steel nozzle, and eventually hardened steel extruder parts as well.
I figured out the issue. My hardened extruder gears had worn out and no longer had any good teeth to sink into the filament⌠printed too much PETG-CF previously I guess.
I had no issue once I replaced the worn out gears with the stock ones⌠and since I am not planning to print anything too abrasive for a while, it should be ok for now.
That hasnât been my experience with 0.4mm nozzle, I have been printing all sort of PLA/PETG (PLA Sparkle, PLA Galaxy, PLA Glow, PETG-CF, PLA Metal, etc.) filaments for a while now on a 0.4mm with no problem. That includes both the Bambu hardened 0.4mm nozzle and my aftermarket CHT-style one (with hardened extruder gears). The problem wasnât in the nozzle anyways, it looks like the hardened extruder gears were simply worn out. I would probably blame the PETG-CF for majority of the wear since that filament is really stiff and even feels abrasive when you touch it.
The black stuff is actually lube on the gears and quite vitalâŚ
One shall never run metal gears dryâŚ
You stuck seems to mean stuck by the filament being worn out in one spot paired with the groves on the roller being full of dust.
Stuck for me means more like the filament having expanded and no longer being able to get through the extruder in either direction.
This sort of wear and tear you experience is often caused by the extrusion temp being too low.
Print a model with lots of retractions, like a little desiccant box or such.
But try this the first time around with you standard print settings and stop the print after about a cm (in height) filled with lots of retractions.
Check the filament that was rolled back up by taking the roll out.
You will see and feel the marks left from those rollers but should be looking nice and clean, preferably with no sharpsâŚ
If you consider your print temp as ideal play with those retraction settings.
Stringing NOT caused by a too high print temp is a clear indication of bad retraction settings.
Same for those start and end points looking rough or not having enough filament placed.
The wear on our transport rollers is not so much caused by some filaments being more abrasive than others but but dust filling them and the rollers grinding over the filament rather than grabbing it.
With the right retraction settings not only only minimise the required retraction distances but also the forces applied on the filament.
Let me try to explain:
The filament was retracted, which is no big issue as only air can enter the nozzle, there is no vacuum formedâŚ
Different story when the print move starts again.
If the filament comes out too fast, too early we get a higher pressure in the melting chamber.
Can affect the print quality but will make a difference for our extruder.
For rather âtackyâ filaments this goes both ways as a too fast retraction can make the filament slip on the way out.
If you find this solved topic and the solution does not work for you consider tuning your retraction settings
It sounds frustrating dealing with the Bambu PLA Galaxy filament causing issues in your P1S extruder. Filaments with additives like glitter or particles can sometimes pose challenges, especially with extruder mechanisms. Cleaning it out with isopropyl alcohol seems like a good approach. Have you tried adjusting the extrusion temperature or speed to see if that affects the filament behavior?
