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. M12by happycaribou77fr - Duet