Struggling with Z-Probe

koreandi

Hi togehter,

I decided to retrofit my Kodak Portrait Core XY from a Raspberry Pi / Smoothiboard Combo to Duet.
I replaced the board and hooked up all the components.
My Board is DUET 2 Wifi (3.1.1) and a PanelDue 5i.

I got nearly everything to work except my Z-Probe.
The Z-Probe is my active Nozzle and the Dashboard shows when the Nozzle is triggered Z-Probe "1000", if not triggered "0".
Z-Probe is connected to IN and GND.

I cannot get my Home-z to work and don´t know what I do wrong.

The home x and y are running without any problem.
As soon as I want to Z-Probe my Bed the bed just moves down by 5mm and then 2mm (See code line 6 and 10). It doesnt even move towards my nozzle.
Wherever the position of Z is the printer will set Z0 on there.

homez.g

G90
G1 X105 Y105 F2000
G91
G1 H2 Z5 F200
G1 H1 Z-300 F500
G1 Z5 F250
G1 H1 Z-300 F100
G92 Z0           
G91             	
G1 Z2 F100
G90

config.g

...
M208 X0 Y0 Z0 S1
...
M208 X215 Y210 Z235 S0
...
M558 P5 I1 C"^zprobe.in" H3 F120 T6000
...
G31 P500 X0 Y0 Z0
...

I am sure this is a classical ERROR-40 but I don´t get it. And inbetween I changed a lot of things to get it work.

Could anybode please give me a hint?

The printer is a Core XY with Endstop in X+ and Y+. Lowering the bed is Z+ direction. I also have a Z+ Endstop which I deactivated (maybe I will use it in future as a emergency stop).

If I should post more Codes or information please let me know.

best wishes and tank you in advance

andreas

jay_s_uk

G30 should be used to probe the bed and not G1 H1 moves.

Here is an example of my homez.g file using a probe

; homez.g
; called to home the Z axis
;
; generated by RepRapFirmware Configuration Tool v3.1.4 on Tue Sep 22 2020 14:08:43 GMT+0100 (British Summer Time)


G91 															; Relative mode
G1 H2 Z5 F5000													; Lower the bed
G90																; Back to absolute positioning
G1 X160 Y130 F10000 		 										; Move to the center of the bed

; ################# Home Z Preparation ################

M558 F250 				 										; Set the probing speed
G30					 											; Probe a single point
M558 F30 				 										; Set a slower probing speed
G30					 											; Probe a single point

koreandi

...jay_s_uk

Thanks a lot.
I changed the code and it wors.
I used my Endstop before to home Z and just thougth I could change the direction.