The flow of multiples of my P1S started to be off and I can’t find a way to bring it back to normal. Sometime it print normaly, but most of the time my print is good for garbage. If some of you have an idea of what’s the problem I would like to hear it. I’ve already cleaned the extrude and the nozzel. I also changed the thermal grease of the hotend to confirm it wasn’t a temp problem. Here some of my print and test / calibration I’ve done.
I used the same parameters for the past years on my P1S and X1C and it’s the first time it does that and both my X1C still use those parameters and work fine. So I dont really understand where the problem is coming from?
From the looks of it you seem to have the issue on the first layer so…
first and foremost if not done already deep clean your PEI sheet(s) with dish washing liquid and rinse (no IPA)
Next if you use Orca Slicer ensure that you don’t have the bottom layer flow rate too low
it may seem stupid but had similar issues in the past with firmware upgrade on the X1C where factory reset helped. Here is a list i would do when something like that happens on my X1C or other printers, not necessarily in that order
Factory reset - if have not done so recently or after firmware upgrade
Check the AMS filament path for resistance - usually starting with manual infeed and before get to the AMS
Try other filament type or/and batch - helps identify if Printer or filament/settings related
Visually check if the Nozzle assembly has not been bend
Check the PTFE path inside the printer had PTFE disconnected once ow twice causing issues
Manually extrude a quate a bit with higher temperature(20C above the normal print)
Clean the nozzle , including with cold pulls and making sure that reassembled properly
Open the extruder and check if something small left in the gears
sorry been away
not sure if the question was for @tech.chronomed , But here are two cents for @just4memike
These values are different for each filament and sometimes on batch i receive and color for some materials i noticed that probably the color does not affect it so much but the batch it is coming from . Also changes of temperature affect it a bit but that is with in the real fine tunning which is not needed in 90% of the cases
my current values on the X1C :
e-sun eASA at the moment is 0.99 and K 0.047
e-sun PETG flow 0.96 and K 0.044
e-SUN PLA+ blue 0.99 K 0.028 ( might be variation from a batch)
e-SUN PLA+ black 0.98 K 0.025
e-SUN PLA+ white 0.98 K 0.025
eSUN ABS+ F 0.98 K 0.03 - the K looks a bit low but that is the last i used
eSun PC 0.97 K 0.06
Also found that these values are very close if not the same on the Prusa MK4 nextruder must have very similar thermo and flow characteristics for 0.04mm
example :
e-SUN PLA+ green 0.98 K 0.024
e-sun PETG flow 0.98/0.97 and K 0.05
@jsc0 replacing extruder motor is not a common thing at all, but You will easily know if it does usually stops or start stop skipping in rotation when extracting linear XXmm and heats up unusually, assuming that the gears are fine which is the first thing to check
more likely the extruder gear assembly can become a problem especially with plastics, but even that is not very common , relatively easy to disassemble and check visually . The motor can be damaged if there is a problem with gears and used, not sure how much protection Bambu added to avoid that , but should have enough
the motor can be measured and/or tested if you have the skills or learn
