Tried a second SD card with a fresh folder structure and it works. So I guess now the question is, why did my SD card get messed up?

I've been using my Duet Maestro in my Lowrider CNC build and its been working fine, previously came out of my Delta printer where it was also working fine. Today I tried to log in to the webpage and couldn't, so I went and looked at the Maestro and neither of the ethernet lights were on, so I figured it was a network issue. After ruling out network issues I decided to connect to the Duet via USB. I was able to enable the network but then when I tried to access the webpage I got the following:

Your Duet rejected the HTTP request: page not found
Check that the SD card is mounted and has the correct files in its /www folder

After that and looking on the forums for some clues I found that I should run M503 and M39 in YAT. For M503 I got an OK response, but for M39 I got "Error: No SD card mounted in slot 0".

Any idea whats going on? Do I just need to reformat the SD card? I plugged it into my laptop (Mac) and it tells me the card needs to be reformatted before it can be read...which I'm reluctant to do, as I don't have a backup.

@Phaedrux So I do have one more question, I have my z-axis home at my lowest point, and I have no bed probe. How exactly do I get the printer to recognize that prints need to start at Z maximum not Z=0?

Solved it, you pointed me in the right direction. My motor directions were different, swapped M569 P4 S0 to S1 and it works great now. Thanks for the help.

Uh now that you mention it, it seems Y moves it in left and right, X moves it backwards and forwards. Whats intended to be the X-axis endstop is front left, y-axis endstop is also front.

Probably a good idea, here they are:

; homeall.g
; called to home all axes
;
; generated by RepRapFirmware Configuration Tool v3.1.1 on Fri May 29 2020 12:19:21 GMT-0500 (Central Daylight Time)
G91 ; relative positioning
;G1 H2 Z5 F6000 ; lift Z relative to current position
G1 H1 X-368.5 Y-297 F6000 ; move quickly to X or Y endstop and stop there (first pass)
G1 H1 X-368.5 ; home X axis
G1 H1 Y-297 ; home Y axis
G1 X5 Y5 F6000 ; go back a few mm
G1 H1 X-368.5 F360 ; move slowly to X axis endstop once more (second pass)
G1 H1 Y-297 ; then move slowly to Y axis endstop
G1 H1 Z-305 F600 ; move Z down stopping at the endstop
G90 ; absolute positioning
G92 Z-308.7 ; set Z position to axis minimum (you may want to adjust this)

; homex.g
; called to home the X axis
;
; generated by RepRapFirmware Configuration Tool v3.1.1 on Fri May 29 2020 12:19:21 GMT-0500 (Central Daylight Time)
G91 ; relative positioning
;G1 H2 Z5 F6000 ; lift Z relative to current position
G1 H1 X-368.5 F6000 ; move quickly to X axis endstop and stop there (first pass)
G1 X5 F6000 ; go back a few mm
G1 H1 X-368.5 F360 ; move slowly to X axis endstop once more (second pass)
G1 H2 Z-5 F6000 ; lower Z again
G90 ; absolute positioning

; homey.g
; called to home the Y axis
;
; generated by RepRapFirmware Configuration Tool v3.1.1 on Fri May 29 2020 12:19:22 GMT-0500 (Central Daylight Time)
G91 ; relative positioning
;G1 H2 Z5 F6000 ; lift Z relative to current position
G1 H1 Y0 F6000 ; move quickly to Y axis endstop and stop there (first pass)
G1 Y5 F6000 ; go back a few mm
G1 H1 Y0 F360 ; move slowly to Y axis endstop once more (second pass)
G1 H2 Z-5 F6000 ; lower Z again
G90 ; absolute positioning

; homez.g
; called to home the Z axis
;
; generated by RepRapFirmware Configuration Tool v3.1.1 on Fri May 29 2020 12:19:22 GMT-0500 (Central Daylight Time)
G91 ; relative positioning
G1 H2 Z5 F6000 ; lift Z relative to current position
G1 H1 Z-305 F100 ; move Z down until the endstop is triggered
G92 Z0 ; set Z position to axis minimum (you may want to adjust this)

; Uncomment the following lines to lift Z after probing
;G91 ; relative positioning
;G1 Z5 F100 ; lift Z relative to current position
;G90 ; absolute positioning

So I'm working on getting my new CoreXY build working. So far, I've run into an issue that I can seem to figure out, the printer will home in Y, but then it will go to home in X when Y is at minimum, and it doesn't move and makes a horrendous racket (motors skipping). If I set the middle of the print area as X0 Y0 with G92 I can move X and Y no problem and they move in the directions I would expect. End stops are all reporting correctly. Any idea whats going on here?

Config is as seen below:

; Configuration file for Duet WiFi (firmware version 2.03)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.1.1 on Fri May 29 2020 12:19:21 GMT-0500 (Central Daylight Time)

; General preferences
G90 ; send absolute coordinates...
M83 ; ...but relative extruder moves
M550 P"ToolChanger" ; Set machine name
M587 S"*******" P"********"
M669 K1 ; select CoreXY mode
;M667 S1

; Network
M552 S1 ; enable network
M586 P0 S1 ; enable HTTP
M586 P1 S0 ; disable FTP
M586 P2 S0 ; disable Telnet

; Drives
M569 P0 S1 ; physical drive 0 goes forwards
M569 P4 S0 ; physical drive 1 goes forwards
M569 P2 S1 ; physical drive 2 goes forwards
M569 P3 S1 ; physical drive 3 goes forwards
M584 X0 Y4 Z2 E3 ; set drive mapping
M350 X16 Y16 Z16 E16 I1 ; configure microstepping with interpolation
M92 X100.00 Y100.00 Z400 E683.3 ; set steps per mm
M566 X900.00 Y900.00 Z12.00 E120.00 ; set maximum instantaneous speed changes (mm/min)
M203 X6000.00 Y6000.00 Z300 E1200.00 ; set maximum speeds (mm/min)
M201 X500.00 Y500.00 Z40.00 E250.00 ; set accelerations (mm/s^2)
M906 X1600 Y1600 Z800 E1000 I30 ; set motor currents (mA) and motor idle factor in per cent
M84 S30 ; Set idle timeout

; Axis Limits
M208 X-35 Y-49 Z-350 S1 ; set axis minima
M208 X328.5 Y243 Z0 S0 ; set axis maxima

; Endstops
M574 X1 Y1 Z1 S1 ; set active low and disabled endstops

; Z-Probe
M558 P0 H5 F120 T6000 ; disable Z probe but set dive height, probe speed and travel speed
M557 X-20:215 Y-34:195 S20 ; define mesh grid

; Heaters
M305 P0 T100000 B4138 R4700 ; set thermistor + ADC parameters for heater 0
M143 H0 S120 ; set temperature limit for heater 0 to 120C
M305 P1 T100000 B4138 R4700 ; set thermistor + ADC parameters for heater 1
M143 H1 S280 ; set temperature limit for heater 1 to 280C

; Fans
M106 P0 S0 I0 F500 H-1 ; set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned off
M106 P1 S1 I0 F500 H1 T45 ; set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned on

; Tools
M563 P0 D0 H1 F0 ; define tool 0
G10 P0 X0 Y0 Z0 ; set tool 0 axis offsets
G10 P0 R0 S0 ; set initial tool 0 active and standby temperatures to 0C

; Custom settings are not defined
M569 P1 R-1

@droftarts said in Duet 2 Wifi Driver Failure:

M569 P1 R-1

That did it, thank you!

Ok so my motor was mis-wired so thats my bad. The driver shorted to ground, so that IC (Y-axis) was getting very hot when the board was powered. I've since desoldered that particular TMC2660 so I have a bare spot and I'm just going to use the E1 driver for my axis. I have a new problem now though, the board is reporting Short to GND on Driver 1 and over temperature shut down on Driver 1. Is there a simple way to ignore those errors for now? I have a new TMC2660 ordered but I'd like to continue for the time being.

So I was trying to get my homebrew toolchanger up and running, and I had some 28 Ncm steppers on the x-y axis and I decided to swap them for other motors I had (48 Ncm). I got the belts hooked up, got the motors wired up (turns out I had one of them backwards), booted the machine up and tried to get it to home. No surprises it didn't home, but what did surprise me, was that my Y-axis stepper driver gave up the magic blue smoke. I'm capable of replacing the driver, so its not exactly the end of the world, but I would like to determine root cause...anyone have any ideas? All I can think of is that maybe I pushed it into an overcurrent situation? But I would have thought that the TMC 2660's would have shut off in the even of overcurrent