Dual Z axis creating an U drive separately which is so not homing

[kiki0000]

Hi. I have an SKR 1.4 configured with the great Reprap firmware. Similarly to my Duet wifi I configured a dual Z axis to have independent Z axis compensation with a BLtouch. I have assigned it the following way: M584 X0 Y1 Z2:4 U4 E3
My problem is that it is showing up in the Duet web control as a separate U drive and so due to the reason it is not homing it always drops an error that it is not homed and a G29 mesh bed leveling cannot be initialised. Am I doing something wrong?

Thank you for your support in advance.

[evgen2910]

you must write M584 X0 Y1 Z2:4 E3 - this means that you have two Z motor connected to Z and E1 driver. In board.txt must be set stepper.numSmartDrivers = 5; . If you want independent Z-axis compensation, you must write to config.g M671 X-45.0:355.0 Y150.0:150.0 S0.5 ; Z leadscrews are at (-45,150), (150,355) with you location motor & put

M291 P"Probing mesh grid process started" R"Probing.." S1 T2 M561 ; clear any bed transform M671 S5 ; specify a maximum correction per leadscrew a 5mm G28 ; home M401 ; deploy Z probe (omit if using bltouch) G30 P0 X10 Y150 Z-99999 ; probe near a leadscrew, half way along Y axis G30 P1 X300 Y150 Z-99999 S2 ; probe near a leadscrew and calibrate 2 motors 1pass G30 P0 X10 Y150 Z-99999 ; probe near a leadscrew, half way along Y axis G30 P1 X300 Y150 Z-99999 S2 ; probe near a leadscrew and calibrate 2 motors 2 pass G30 P0 X10 Y150 Z-99999 ; probe near a leadscrew, half way along Y axis G30 P1 X300 Y150 Z-99999 S2 ; probe near a leadscrew and calibrate 2 motors 3 pass M561 ; clear any bed transform G28 ; home all axis bb

to your bed.g whis your position probe at X and Y

[kiki0000]

evgen2910 many thanks for your help! My only issue was that I followed the Duet way and I also added the U4 after the two Z mapping. I only had to remove this and everything works perfectly.