G29 Error
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i'm having some problems when i try to probe (clicky probe NC) my bed.
Probe already triggered before probing move started
i have tried to use the G30 command same resoult
At a first look the probe seems fuctioning giving 0 when the probe is installed and non activated and 1000 when tounching the build plate.
i have tested the probe whit this https://docs.duet3d.com/User_manual/Connecting_hardware/Z_probe_testing
this is my config.g
; Z-Probe
M558 P5 C"^probe" H8 F2000:300 T2000 A2 S0.03 ; Z probe connected to Duet 2 E0 endstop input
M557 X30:180 Y30:180 S20 ; define mesh grid 215
G31 P-0.720 X8 Y22 ; Z parameter trigger height -
https://docs.duet3d.com/User_manual/Connecting_hardware/Z_probe_testing
before doing this test it didn't give this error -
@Simone Your trigger value (P-0.720) to G31 looks odd to me. What is it that you intend that value to do?
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@gloomyandy
Once you have the nozzle touching the bed, send command G92 Z0 to tell the firmware that the head is at Z=0
Jog the head up by 5 to 10mm
Send command G30 S-1. The nozzle will descend or the bed rise until the probe triggers and the Z height at which the probe stopped will be reported in the console. If you are using a nozzle-contact Z probe, the trigger height will be slightly negative. For any other type of Z probe where the probe triggers before the nozzle contacts the bed, it will be positive. -
@Simone The trigger height is set using the Z parameter to G31, not the P parameter: https://docs.duet3d.com/en/User_manual/Reference/Gcodes#g31-set-or-report-current-probe-status
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@gloomyandy what is the difference z and p?
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@gloomyandy It seems working!
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@gloomyandy G29
Warning: the height map has a substantial Z offset. Suggest use Z-probe to establish Z=0 datum, then re-probe the mesh.
64 points probed, min error 3.395, max error 3.661, mean 3.503, deviation 0.055
Height map saved to file 0:/sys/heightmap.csv -
What do you have in your homez and homeall files to home the z axis?
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@Simone https://docs.duet3d.com/User_manual/Reference/Gcodes#g31-set-or-report-current-probe-status P is the trigger value; certain probes report a value between 0 and 1000 (IR probe, Smart Effector, Piezo probes) and setting P allows to fine tune the trigger value of whatever gets reported.
