TmRxJD commented 1 year ago

I have been using this plugin for a while now with no issues, and have been exceedingly happy with it. Last night I made a change to my toolhead and the probe offset is slightly smaller now. Even though I adjusted this to the correct value, every time I go through the calibration process now the nozzle is always about 2mm too high from the bed, but this is the exact height the probe should trigger at. I have no idea what's going on, clearly I've set something wrong but after hours of messing with this I can't figure it out. Any help would be appreciated. My understanding was you should be able to change the bed and nozzle and this plugin will compensate automatically..

TitusLabs commented 1 year ago

This is very strange. I don't know what you changed at your tool head, but I would have assumed that the calibration should work without any other changes (except for X, Y adjustments at the endstop). Have you found a solution yet? Otherwise, I would go through all the settings and calibration steps again piece by piece and make sure that no mesh is loaded...

TmRxJD commented 4 months ago

Thank you for the reply. I have somewhat found a solution, manually raising the offset after printing the first layer. I think there is some backlash in the system, and even though I tried antiback lash nuts the problem persists. I've also recently developed a band at a consistent height on anything I try to print, I've never had banding issues before and always bragged about how perfect my prints looked. Here is my start sequence, maybe I'm missing something. I made sure to clear the mesh before starting offset calibration.

[gcode_macro START_PRINT] gcode: {% set BED_TEMP = params.BED_TEMP|default(60)|float %} {% set EXTRUDER_TEMP = params.EXTRUDER_TEMP|default(200)|float %}

Start bed heating (but don't wait for it)

SET_HEATER_TEMPERATURE HEATER=heater_bed TARGET={BED_TEMP}
# Restore max speed/accel/accel_to_decel to their configured values
SET_VELOCITY_LIMIT VELOCITY={printer.configfile.settings.printer.max_velocity} ACCEL={printer.configfile.settings.printer.max_accel} ACCEL_TO_DECEL={printer.configfile.settings.printer.max_accel_to_decel}
G21 ; Millimeter units
G90 ; Absolute XYZ
M83 ; Relative E
G92 E0 ; Reset extruder distance
{% if not 'xyz' in printer.toolhead.homed_axes %}
    G28
{% endif %}
Attach_Probe_Lock
TEMPERATURE_WAIT SENSOR=heater_bed MINIMUM={BED_TEMP}; Wait for bed to reach target temp
SET_HEATER_TEMPERATURE HEATER=extruder TARGET=100
BED_MESH_CLEAR
Z_TILT_ADJUST
CALIBRATE_Z
SET_HEATER_TEMPERATURE HEATER=extruder TARGET=175
BED_MESH_CALIBRATE
SET_HEATER_TEMPERATURE HEATER=extruder TARGET={EXTRUDER_TEMP}
Dock_Probe_Unlock
#Wait for nozzle to reach target temp
TEMPERATURE_WAIT SENSOR=extruder MINIMUM={EXTRUDER_TEMP}
{% if BED_TEMP >= 100 %}
    TEMPERATURE_WAIT SENSOR='z_thermal_adjust' MINIMUM={30}
{% endif %}
KOMB
LINE_PURGE

I've also made sure every single screw I can find is tight. This has always worked great for me, even after the upgrades, then just suddenly started acting up. I have to be missing something. If there's any other information that would be helpful I am happy to provide. Thank you for you time in working with me on the issue.

From: Titus Meyer @.> Sent: Monday, October 16, 2023 11:03 AM To: protoloft/klipper_z_calibration @.> Cc: TmRxJD @.>; Author @.> Subject: Re: [protoloft/klipper_z_calibration] Probe trigger height being used as Zero position (Issue #121)

This is very strange. I don't know what you changed at your tool head, but I would have assumed that the calibration should work without any other changes (except for X, Y adjustments at the endstop). Have you found a solution yet? Otherwise, I would go through all the settings and calibration steps again piece by piece and make sure that no mesh is loaded...

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protoloft / klipper_z_calibration

Probe trigger height being used as Zero position #121

Start bed heating (but don't wait for it)