External driver, motor not working

g0rg

Hi all,
I use a duet 2 ethernet (RRF3.2) with an expansion breakboard.
1 X, 2 Y and 2 Z axis use integreted drivers (nema17)
and i added an A axis with an external driver on P5 (nema23).
It's the first time that i use external driver

Im'sure I'm doing something wrong in my config.g file but i dont know what
Here is my setup and my code is below:
My goal is to 3d print on wheels on this 4th axis.

config.g (partial)

; Configure Drives
M569 P0 S1 					; Drive 0 goes forwards
M569 P1 S0 					; Drive 1 goes forwards
M569 P2 S1 					; Drive 2 goes forwards
M569 P3 S0 					; Drive 3 goes forwards         
M569 P5 S0 R0 T2.5:2.5:5:5 		; A AXIS Drive 5 goes forwards (E2 on Expansion Header)
M584 X0 Y1:3 Z2				; Apply drive mapping to axes
M584 A5 R1 					;

; Configure Axes
M92 X400 Y400 Z400 A400 	; Set steps per mm
M350 X16 Y16 Z16 A64  I1 	; Configure microstepping
M566 X1000 Y800 Z1000 A1000 	; Set maximum instantaneous speed changes (mm/min)
M203 X4000 Y3000 Z2000 A2000 	; Set maximum speeds (mm/min)
M201 X150 Y150 Z150 A150	; Set accelerations (mm/s^2)
M906 X2400 Y2400 Z2400 A2030  I30 ; Set motor currents (mA)


; Configure Axis Limits
M208 X0 Y0 Z0 A0 S1		; Set axis minima
M208 X600 Y600 Z600 A360 S0 	; Set axis maxima

How to say that the A axis has no maxima ?
How can i know what to put exactly in M569 ?

M569 P5 S0 R0 T2.5:2.5:5:5

is this correct ?

o_lampe

@g0rg AFAIK, you can't configure microstepping for external drives. You have set M92 steps accordingly (400*64), but keep in mind that rotational axis has different step-meaning. (steps/degree I would guess?)

T3P3Tony

@g0rg said in External driver, motor not working:

Although I don't think your issues are caused by using RRF 3.2 I would upgrade to 3.3 as much has changed between them (remember to read the changes). Specifically this point for RRF 3.3: "[Duet WiFi/Ethernet] When using extended step timings (M569 T parameter), maximum step pulse rates are improved a little"

How to say that the A axis has no maxima ?

You have define the A axis as a rotary axis using the R1 parameter so it should have no maximum.

How can i know what to put exactly in M569 ?

The information about the step pulse timing should be in the data sheet for your external driver. Also the enable logic (R0 vs R1) should be in the data sheet.

Also if you are not getting motor movement check the data sheet to confirm that driver is happy with differential signals at ~3.6V. The alternative is to us single ended with the + lines pulled to 5V;
https://duet3d.dozuki.com/Wiki/Duet_Expansion_Breakout_Board#Section_Signalling_voltages