Nozzle Scratching

Bambu Lab A1 Series Troubleshooting
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I tried to use my new 0.2mm nozzle on my A1 in order to draw a hueforge art. However the nozzle keep scratching the printed part and ruined the whole thing. I use Bambu textured PEI plate, and eSUN PLA+, with 0.08 layer height, I tried 0.16 and 0.12 layer height, and modifed the z-offset from the gcode.

the gcode I modified is as below:(Machine Start G-code)

;===== for Textured PEI Plate , lower the nozzle as the nozzle was touching topmost of the texture when homing ==
;curr_bed_type={curr_bed_type}
{if curr_bed_type==“Textured PEI Plate”}
G29.1 Z{+0.02} ; for Textured PEI Plate
{endif}

the Z{-0.02} is the default setting, I tried -0.00 and +0.02, neither of them works.

I always enable bed leveling and flow dynamic calibration while I print. Can someone help we solve the problem? Thank you.

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Did you change the nozzle type in the settings on the printer?

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3

Yes, the nozzle setting is correct

4

Try and use default settings and see what happens. My A1 also has problems with over extrusion, so it could be that too. I call it layer grinding.

5

i know this fix works for normal prints, i have printed a few hue forge with no issue also. try unchecking the box for reduce infill retractions under others > gcode output. it fixed my nozzle dragging issue for all of my prints since changing it.

6

Same issue on my a1 mini. I’ve done everything I’ve seen being recommended on this forum. For me, it appears to only happen on the solid infill layers. To me, that makes it sound like a software issue. But, I am brand new to 3d printing, so I could be wrong. I have submitted a service ticket, I hope something comes from it.

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have you tried taking the nozzle off and making sure it’s fully seated? This, especially on a .2 nozzle is like… what in the world lol

set the machine to factory defaults, put the .4 back in, run the initial calibration again. Remember, there could be filament blocking inserting the nozzle if you didnt run the un-load filament before swapping heads.

Also those layer heights seem high for a .2 nozzle.

the defaults are 0.1, > 0.15 is max > 0.05 is minimum

you’re pushing the high side. Try going lower or switch to the .4 nozzle… Its probably over extruding, plus, you’re on the high side of the nozzle, plus the nozzle may not be seated properly.

Final note, make sure you reset the zoffset back to default until you get it working again. there is no reason to go +0.02. I like mine at 0.00 but i fine tuned it from a functioning state.

OOOH, i forgot too, did you update to 2.0 bambu slicer?
going from 1.9 to 2.0 causes all kinds of problems.

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