Print settings:
0.4 Nozzle, 0.2 layer height
P1S, sliced with Orca Slicer
Arachne wall generator
Only one wall on first layer
Small area flow compensation checked
Wall order - Inner/Outer/Inner
3 walls, 10% gyroid infill
First layer speed - 25mm/s
First layer infill 85mm/s
Outer wall speed - 50mm/s
Slow down for overhangs - checked
slowdown for curled perimeters - checked
Bridge speed (external) - 50mm/s
Print by Object
Filament used:
eSUN PLA+ - Milk White
Hatchbox PLA - Matte Navy
Filament settings:
First layer temp - 200C
Flow Ratio - 0.98 for both of them
Narrative
I have 2 P1S’s and one is printing this model just fine, the other looks like it is having layer adhesion issues. The PEI plate has been cleaned thoroughly and the printer has had it’s maintenance done as well as gone through a calibration. I’ve also replaced the nozzle since I don’t remember the last time the nozzle was replaced (I thought it might have been nozzle wear that was contributing to this).
The thing that’s bugging me, is if I print this on my other P1S that I have not done maintenance on in months, it prints great. No layer adhesion issues. No under-extrusion on the bottom or top layer.
I’ve not updated the firmware since I still want to use Orca Slicer and not go through Bambu Connect.
I also tried printing it with Bambu Studio to see if the slicer made a difference. It did not.
I replaced the bowden tubes in the AMS for the problem printer, thinking maybe those two slots were the issue.
It looks like the printer that had maintenance is under extruding. Why would one printer under extrude and the other printer be fine when I’m printing with the same settings and same filament? And I mean the exact same filament. I move the rolls from one AMS to the other.
I replaced the extruder gears and cleaned out the housing. I’m at a loss as to what is causing this. I ordered a new extruder unit from Bambu to replace the one in the printer but I don’t know where to go after that. I think I have to open a support ticket.
Here’s some pics of the problem,
Also, the background for above the pics is the bottom of a basket that was recently printed on the problem printer. You can see it looks bad.
Another pic of the same model printed at 3 different times. I think it slowly gets better each time.
This was printed with Bambu Basic PLA in Cyan