Configuring the Motors

Motors are usually connected to the 4-wire outputs labeled Drive0...Drive5. This shows three motors (X,Y,Z) connected to the ports.

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Configuring motors on the Duet3 is done by adding script lines to the config.g system file. Because they are G and M code you can type the commands into the Duet3 G-Code console to test motor configuration and then write them into config.g for permanent running at startup.

Here's a first attempt at script lines for the X motor only. It is a 3A Nema23 motor connected to the drive 0 cable. None of the parameters are tuned but the axis runs fine.

; motor definition
M569 P0.0 S0    ; physical drive 0.0 goes forwards
M584 X0.0       ; set drive mapping X to 0, Y to 1 and Z to 2

M350 X16  I1    ; configure microstepping with interpolation
M92 X1280.00    ; set steps per mm

M203 X1400      ; set maximum speeds (mm/min)
M566 X500       ; set maximum instantaneous speed changes (mm/min)
M201 X100       ; set accelerations (mm/s^2)

; use about 80% of power rating for heat
M906 X2400 I30  ; set motor currents (mA) and motor idle factor in per cent