Unused Extruder used for z axes

cap

Dual z axes motors I know z has twin motor ports but I do not know if I can use one of the extruder ports as a second z axes motor

T3P3Tony

HI Cap

This is possible with M584, see this in the documentation:
https://duet3d.com/wiki/Connecting_stepper_motors

Using multiple drivers for the Z axis where they can be moved independently for bed levelling is on the firmware wishlist:
https://www.duet3d.com/forum/thread.php?id=8
(point G)

cap

thanks for the info i am not an engineer i am a driver by trade but you guessed that all ready
sorry for stupid question
so would this be right
M584 X0 Y1 Z2:4 E3

should i add this to the Editing /sys/config.g under Drives be the place to put it

meaning to me the other z motor is conected in the last and empty motor drive meat for the second extruder (E1)
i wont say last stupid question as im sure you here/read plenty of them
if i use the dual z motor connectors is the power supplied by default 800ma is shared over both connectors

dc42

Put the M584 command before the M906 command. The Z current you specify in M906 will be applied to each Z motor.

cap

thank-you only thing is one motor was working back to front quick power down and turn the motor wire around sorted it out but thanks for all the help
now to do some reading on tuning heaters