Dual Z homing issue - one motor only

Hello,

I have passed quite a few hours on trying to troubleshoot my dual Z homing on my duet:

Board: Duet 2 WiFi (2WiFi)
Firmware: RepRapFirmware for Duet 2 WiFi/Ethernet 3.3 (2021-06-15)
Duet WiFi Server Version: 1.26

upon startup, if I manual enter in the console:
G91
G1 H2 Z30 F6000
G1 H2 Z-30 F6000
All good, as both motors are moving in the right direction and the bed is moving +/-3cm.
M122:
Driver 0: position 0, standstill, SG min/max not available
Driver 1: position 0, standstill, SG min/max not available
Driver 2: position 192210, standstill, SG min/max not available
Driver 3: position 0, standstill, SG min/max not available
Driver 4: position 0, standstill, SG min/max not available

if I run after
G1 H1 Z-30 F1800
only 1 motor moves... which is an issue for homing. I have no clue what is wrong.....

Could you please help?

I attached my config.g, homeall.g and homez.g.
I tried switch motor cables Z1<->Z2 and it just changed the problem to the other motor.

Edited 1 time(s). Last edit at 11/20/2021 06:25AM by happycaribou77fr.

You have specified in your config.g file that you have separate Z endstop switches for each motor:

Quote

M574 Z1 S1 P"zstop+e1stop" ; configure active-high endstop for low end on Z via pin zstop

Most likely there is a bad connection to one of the switches, so that it appears to the firmware that it is permanently triggered.

For faster response to questions about Duet and RepRapFirmware, post at [forum.duet3d.com].

Edited 1 time(s). Last edit at 11/21/2021 05:55AM by dc42.

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Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod

Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].