Configure Cartesian Printer with dual z screw
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I have a Cartesian printer with dual z screw on a duet 0.8.5. Right now I have them wired in series to the z stepper. If i want to control the 2 z screws with independent steppers for each z (one connected to the z stepper and one connected to the e1 stepper). would i use the following code in my config.g:
M584 X0 Y1 Z2:3 U3 E4?
Are there any other modifications i need to make to the config.g or other files?
Any help is appreciated.
Thanks
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You need to configure the U motor just like the Z for things like micro stepping, steps/mm, etc.
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You don't need to create a U axis unless you want to home them using separate homing switches. The recommended approach is now to just configure them as multiple Z drivers, for example M584 X0 Y1 Z2:3 E4. Then in firmware 1.19beta11 you can use your Z probe to level them, see https://duet3d.com/wiki/Bed_levelling_using_multiple_independent_Z_motors.
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Perhaps I'm being thick, but how does one define X,Y coordinates for the Z motors on a moving bed printer like the Prusa i3?
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Assuming you have one Z motor at either end of your X axis, that gives you the X coordinates. For the Y coordinates, use the mid point of the bed.
