Nozzle to high when printing BLTouch

Veti

if you know that its off by 1mm increase the G31 z offset by 1mm

jasko

Tried that but noting happens, its like this offset is ignored.

Veti

maybe you set the offset accidentally in
M558

M558 P9 X0 Y0 Z0.5 H5 F120 T6000 ; Set Z Probe to type Switch or Digital output where Z probe connector is used. Used for z only.

x y z should not be part of the M558 command

also you should adjust your config properly for dual y setup.
see
https://duet3d.dozuki.com/Wiki/Bed_levelling_using_multiple_independent_Z_motors#Section_In_RepRapFirmware_Num_3

M574 Z2 S1 P"io4.in" ; configure active-high endstop for high end on Z via pin io4.in

are you really using a z endstop switch?

G1 H1 X-10 Y-10 u-10 F360 ; move slowly to X and Y axis endstops once more (second pass)
G92 Y0 ;set current position of y axis to 0

dont do the G92 Y0 in homing

DIY-O-Sphere

At the end of your config you read the stored values. (M501)
Please check config-override.g

jasko

@Veti said in Nozzle to high when printing BLTouch:

M574 Z2 S1 P"io4.in" ; configure active-high endstop for high end on Z via pin io4.in

I have removed it but nothing changes.

I'll make those changes for y axis for now it works.

Should I eliminate z endstop switch? Can i use it for homing but instead of z probe homing? But I would still like to use mesh bed compensation?

jasko

@DIY-O-Sphere Those are for headed bed, PID tuning.

Veti

post the output of G31 send in the console

jasko

This is result of G31:

Z probe 0: current reading 0, threshold 500, trigger height 0.700, offsets X0.0 Y0.0

This is from config.g:

G31 P25 X-38.2 Y-11 Z1.447							   ; Set Z probe trigger value, offset and trigger height

Phaedrux

M558 P9 X0 Y0 Z0.5 H5 F120 T6000                     ; Set Z Probe to type Switch or Digital output where Z probe connector is used. Used for z only.
G31 P25 X-38.2 Y-11 Z1.447								; Set Z probe trigger value, offset and trigger height

; Z-Probe
M950 S0 C"io7.out"                                  ; disable heater on PWM channel for BLTouch
M558 P9 C"io7.in" H5 F100 T3000                     ; disable Z probe but set dive height, probe speed and travel speed
M557 X50:840 Y50:1050 S100                         ;defining mesh probe grid

The order of these commands is the problem. You have two instances of M558 and the G31 must come after M558.

Change it to this:

; Z-Probe
M950 S0 C"io7.out"                                  ; disable heater on PWM channel for BLTouch
M558 P9 C"io7.in" H5 F100 T3000                     ; disable Z probe but set dive height, probe speed and travel speed
G31 P25 X-38.2 Y-11 Z1.447								; Set Z probe trigger value, offset and trigger height
M557 X50:840 Y50:1050 S100                         ;defining mesh probe grid

jasko

@Phaedrux Thank you this worked.