Hey, after printing several things from PETG and PLA, I wanted to print something from ABS, since my ABS roll is totally packed, I had to attach it to the external spool holder. So I sliced the file in OrcaSlicer, started the print job with bed leveling and flow calibration, and it started its normal process.
But when it got to the bed leveling, it immediately gave me 3 error messages, all from the Z axis force sensors 1-3, that something was jammed, or the nozzle tip was dirty and it couldn’t do the leveling.
After trying several times to move the bed by hand and check for dirt, where I could not find anything, I gave up and tried to start a PLA print, everything works without any problems.
My guess is that the bed is so bent at 90° that it has problems moving it, although I was able to move it up and down to 90° manually without a single error message.
The first step I recommend is thoroughly cleaning the nozzle.
Unload the filament.
Home the print head.
Lower the print bed to its lowest position to keep it out of the way.
Set the nozzle temperature to 10°C below the maximum recommended for your filament.
Once the nozzle reaches the set temperature, reduce it to 0°C. While the nozzle is cooling, use a cloth dampened with isopropyl alcohol (IPA) to wipe it clean. Ensure you remove all residue from the nozzle, continuing to clean until the temperature drops below the filament’s melting point.
After completing the nozzle cleaning:
Inspect the print bed to ensure it is free of debris, such as small pieces of filament or residue. Check both the surface and underside of the bed to ensure no remnants remain.
Once you’ve confirmed the nozzle and bed are clean, restart the print.
The reason I recommend this approach is that, in my experience, buildup on the nozzle can cause various issues, such as uneven heating or errors during printing. Before replacing the stock nozzle wiper, I encountered similar problems that were resolved with proper cleaning.
Additionally, if you ever decide to print with foaming filaments, such as ASA Aero or PLA Aero, you are almost guaranteed to get filament residue on the nozzle. This can lead to a variety of “false” error messages and other complications if not addressed properly.
Finally, adjusting the bed tramming should be a last resort. Incorrect adjustments can cause more problems if you’re not confident in the process.
So I just started a PLA Printjob with the bed at 90°, and it works just fine, it goes through the autoleveling without a Problem, so it is definitely not a deformed Bed that’s causing the problem with my ABS Print.
My guess is that it is indeed the little “thread” of filament that’s oozing out of the nozzle after the filament has been flushed. I noticed that the Nozzle places a little “dot” on the PEI Sheet when he tries to clean it on the exposed steel surface edge.
How could I best tackle that? Maybe changing the retraction in the Start G-Code so he is retracting a little more to prevent the oozing? Or something major different?
I bolded the line of GCode beneath
G0 X135 Y253 F20000 ; move to exposed steel surface edge
G28 Z P0 T300; home z with low precision,permit 300deg temperature
G29.2 S0 ; turn off ABL
G0 Z5 F20000
G1 X60 Y265
G92 E0 G1 E-0.5 F300 ; retrack more
G1 X100 F5000; second wipe mouth
G1 X70 F15000
G1 X100 F5000
G1 X70 F15000
G1 X100 F5000
G1 X70 F15000
G1 X100 F5000
G1 X70 F15000
G1 X90 F5000
G0 X128 Y261 Z-1.5 F20000 ; move to exposed steel surface and stop the nozzle
M104 S140 ; set temp down to heatbed acceptable
M106 S255 ; turn on fan (G28 has turn off fan)
Apparently IT WAS the bed, that caused the Problem. After trying to start a print 3–4 times, I decided to follow this Tutorial. And now he started the print without a problem. Still wondering why he did it on 90° with PLA but not with ABS, but well at least it works now lol.
