I recently made the switch from the marlin-based stock firmware on my anycubic kobra 2, to klipper. I didn’t have issues with bed levelling or first layer on the stock firmware, but I’m having significant issues running klipper. The bed is uneven, mesh shows a deviation of 0.197mm, it was the same when running stock FW+octoprint.
But it seemed to be correcting just fine for this on the stock FW. I got a consistent good first layer across the entire bed.
With klipper, it’s absolutely impossible to get it to correct for this unevenness. Half the bed will get perfect first layer, but then the second half is either way too squished or hardly connecting to the bed. And it’s causing further issues as it’s also hitting the print when moving, despite having Z-hop of 0.3mm for travel moves.
What the hell is going on? How so I fix this?
DrakeRichards@lemmy.world 9 months ago
If you know your deviation, I assume you have a bed probe, right? Are you using your bed mesh? Can you share your start GCode?
Grippler@feddit.dk 9 months ago
[gcode_macro PRINT_BEGIN] description: Begin printing with nozzle wipe gcode: M300 P500 {% set BED_TEMP = params.BED_TEMP|default(60)|float %} {% set EXTRUDER_TEMP = params.EXTRUDER_TEMP|default(210)|float %} BED_MESH_PROFILE LOAD=default M104 S{EXTRUDER_TEMP} M140 S{BED_TEMP} {% if printer.toolhead.homed_axes != “xyz” %} G28 {% endif %} #BED_TILT_CALIBRATE G1 X80 Y240 Z5.0 F3000 ; position nozzle right next to wipe pad M190 S{BED_TEMP} M109 S{EXTRUDER_TEMP} M300 P500 G4 P50 M300 P500 S1500 G1 Z-0.1 ; lower nozzle before wiping G1 X90 F500 ; wipe nozzle across pad in X direction G1 Y235 F500 ; wipe nozze in Y direction G1 Z3 ; lift nozzle to 3mm G1 X90 Y-3 F6000 ; move nozze to front-left center of bed for purging G1 Z0.28 ; lower nozzle to 0.28mm G1 X120 E25 F200 ; extrude 25mm of filament in a 40mm line G92 E0 ; reset extruder position G1 E-1 F2100 ; quickly retract filament 3mm G1 X135 F10000 ; quickly move away from purge
G92 E0
ShepherdPie@midwest.social 9 months ago
Looks like you have it set to load the profile “default” instead of “bed60”
Also worth asking, did you have your start gcode set in your slicer previously and if so, did you delete it out of there now that you’re using klipper macros?
DrakeRichards@lemmy.world 9 months ago
Could you also post the [bed_mesh] section of printer.cfg?
Grippler@feddit.dk 9 months ago
ShepherdPie@midwest.social 9 months ago
I’m not at my computer now to be able to give specific examples but this most surely sounds like something wrong with the start gcode and klipper not loading your saved mesh before running the print. I’d double check the docs and make sure you have the correct gcode to load your saved mesh.