Duet Wifi RR3 Endstop Config issue

Eman74

Hi all, I'm having some hard time with my CoreXY printer which is finally working and able to print but my Y axis is flipped and I discovered the reason:

my homing (config working with Y flipped) is on the backword left, which is not compatible with standard slicers config where X1-Y1 are located to the bottom Left:

My Config

X-Min,Y-Min ------- X-Max,Y-Min1
X-Min,Y-Max ------- X-Max,Y-MAX

; Drives
M569 P0 S1                                     ; physical drive 0 goes forwards
M569 P1 S1                                     ; physical drive 1 goes forwards
M569 P2 S1                                     ; physical drive 2 goes forwards
M569 P3 S0                                     ; physical drive 3 goes backwards E3D HEMERA
M584 X0 Y1 Z5:6:7 E3                           ; set drive mapping
M350 X16 Y16 Z16 E16 I1                        ; configure microstepping with interpolation
M92 X80.00 Y80.00 Z1666.00 E409.00             ; set steps per mm
M566 X750.00 Y750.00 Z60.00 E120.00            ; set maximum instantaneous speed changes (mm/min)
M203 X6000.00 Y6000.00 Z180.00 E1200.00        ; set maximum speeds (mm/min)
M201 X600.00 Y600.00 Z30.00 E250.00            ; set accelerations (mm/s^2)
M906 X1600 Y1600 Z800 E800 I30                 ; set motor currents (mA) and motor idle factor in per cent
M84 S30                                        ; Set idle timeout

; Axis Limits
M208 X0 Y0 Z0 S1                               ; set axis minima
M208 X400 Y425 Z520 S0                         ; set axis maxima

; Endstops
M574 X1 S1 P"xstop"                            ; configure active-high endstop for low end on X via pin xstop
M574 Y1 S1 P"ystop"                            ; configure active-high endstop for high end on Y via pin ystop
M574 Z1 S2                                     ; configure Z-probe endstop for low end on Z

Now looking at documentations and forum to get my Y-Min (Y1) positioned on my front left should be pretty easy by modifying my M574 command for Y endstop as following:

; Endstops
M574 X1 S1 P"xstop"                            ; configure active-high endstop for low end on X via pin xstop
M574 Y1 S1 P"ystop"                            ; configure active-high endstop for high end on Y via pin ystop
M574 Z1 S2                                     ; configure Z-probe endstop for low end on Z

Except for the fact that my duet wont accept that and when I try to home the Y axis does nothing other than messaging "G28 Error: Failed to enable endstops" and "G28 Error: homing failed"

The hardware and electronic part works perfectly, in fact I can print and home consistently with my old config which has Y axis flipped.

Does anyone knows if I'm missing something?

Eman74

@eman74
the second correct code mode I was meant to write is

; Endstops
M574 X1 S1 P"xstop"                            ; configure active-high endstop for low end on X via pin xstop
M574 Y2 S1 P"ystop"                            ; configure active-high endstop for high end on Y via pin ystop
M574 Z1 S2                                     ; configure Z-probe endstop for low end on Z

Phaedrux

See here for some setup and to do some motor direction tests to get those moving correctly first.

https://duet3d.dozuki.com/Wiki/ConfiguringRepRapFirmwareCoreXYPrinter

The assumption is that 0,0 is the front left corner of the bed. -x moves left, +x moves right, -y moves forward, +y moves back.

The endstop position is defined in M574 at either the - side of travel (low end) or the positive side of travel (high end).

Then the homing direction is controlled by the homing files and should move towards the endstop.