Is the problem along the X Axis? Maybe you have X Axis Twist. Measure z offset on opposite ends of the bed along X. If they are different you need to enable X Axis Twist Compensation.
this post was submitted on 04 Feb 2024
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I already have axis twist compensation enabled.
I literally went through this the other day on my franken-ender 3v2. Re-leveling the bed, even tried axis twist compensation.
I’ve been using Klipper on this thing for a few years and overall it’s been good but finally decided to figure out why I couldn’t get even extrusion across the entire bed even with my klackender probe.
After days and days of trying to adjust, tighten, loosen screws, redo hot end to be sure it was properly mounted, even axis twist compensation (which it definitely was) I just went back and just took it apart and redid the frame. Making sure it was square, nothing was overtigtened, that the vwheels weren’t binding, tightened just past there being any “slop”, etc.
Then I removed the compensation hoping that the issue was mechanical and what do you know, it worked.
I had way over tightened some things obviously and so just going back to the foundation fixed the issue.
It’s working great now and klipper properly works with the slight warped bed of my Ender.
Yeah i actually ended upndoing something similar. Took the hotend and entire bed assembly apart, cleaned and lubed the rails and reassembled. It's been working fine since.
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?
[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
Could you also post the [bed_mesh] section of printer.cfg?
Sure
[bed_mesh] speed: 150 horizontal_move_z: 5 mesh_min: 25, 17 mesh_max: 220, 200 algorithm: bicubic bicubic_tension: 0.5 probe_count: 6, 6
What type of probe and what's the config on it?
[probe]
pin: PC14
x_offset: 23
y_offset: 5
#z_offset: 0.10
speed: 20.0
samples: 5
samples_result: average
sample_retract_dist: 1.0
#samples_tolerance: 0.010
#samples_tolerance_retries: 10
Is what I've got my pinda probe configured with, was playing around with sample tolerances like I have on my printer with a tap probe but I just found the inductive probe has a lot of variation, I added more samples to hopefully average out that error.
[Bed_mesh]
algorithm: bicubic
fade_start: 0.6
fade_end: 10.0
bicubic_tension: 0.2
faulty_region_1_max: 120.0, 74.0
faulty_region_1_min: 85.0, 45.0 # 103,69
faulty_region_2_max: 125.0, 165
faulty_region_2_min: 70, 110 # 103, 137
horizontal_move_z: 2
mesh_max: 228,210
mesh_min: 24, 6
mesh_pps: 2, 2
probe_count: 5,5
speed: 200
Is my mesh setup, based on a mk3s klipper config. Meshes look a little odd but I ran some bed level prints fine and just ran a full plate of abs with pretty consistent 1st layer.
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?
For me, in Cura, I simply have START_PRINT and END_PRINT in the start/end fields in the Cura settings. Based on your macro title, it would be PRINT_BEGIN and PRINT_END
Yeah forgot that I switched to default again to make sure it wasn't something with the different profiles messing it up. I update the mesh before every print now, once it's reached temp.
I did have my start gcode in the slicer before, but that's been replaced with the macro.
I'll try to check mine when I'm back home later. I just use the default profile since I don't ever adjust anything with the bed unless it's out of spec. Even printing at slightly different temps doesn't seem to affect anything as far as bed leveling is concerned.
Yeah I'm not seeing any significant deviations in the mesh based on temps either.