I have recently updated to the 1.21 release and did a brand new configuration as I was on a much older version of the Duet Wifi Firmware.

I am configured as CoreXY from the https://configurator.reprapfirmware.org/

Whenver I make any movement on the Z axis one of the two stepper motors will turn.

So if I send:

G1 Z5 F6000 S2

Motor Z1 moves

If I send the command (G1 Z5 F6000 S2) again

Motor Z2 moves

I didn't see anything in the update notes about a new config option I need to set.

Any help would be appreciated.

So I just did a test because nothing was working again even with S-1.
If I lay a piece of paper on the glass, then it probes every time no problem, it isn't probing to the exact same spot it's quite a bit above the paper but the probe stops every time without crashing.

Which is weird because I see the numbers go 464 and then 538 with only the glass bed but it wont stop. Where as with the paper it does the same thing but it stops.

Not sure if it makes a difference but I have a black heater bed with a 6mm glass plate on top, but as mentioned the G30 S-1 command worked fine.

I linked the config.g up above: https://pastebin.com/Yadsckyx

I do get the correct readings but for some reason when it goes to actually probe it ignores the signal.

I did the following:

G92 Z0
G30 S-1

Then took the reading and used the value for the Z parameter in G31 command in config.g

Nope the LED turns on on the sensor and it just continues to press towards the bed.

Here is a copy of my config.g

https://pastebin.com/Yadsckyx

And here is the Duet version:

[[language]]
Firmware Name:	RepRapFirmware for Duet WiFi
Firmware Electronics:	Duet WiFi 1.0
Firmware Version:	1.19.2 (2017-09-01)
WiFi Server Version:	1.19.2
Web Interface Version:	1.19

For the life of me cannot solve an issue with my new IR sensor.
Below are my setting, following these instructions, https://miscsolutions.wordpress.com/mini-height-sensor-board/

Sending G92 Z0 and then G30 S-1 works fine and it homes.

[[language]]
M558 P1 X0 Y0 Z1 H5 F120 T6000
G31 P500 X0 Y2.4 Z0.949 ; Set Z probe trigger value, offset and trigger height

But when I then run the homez it always crashes into the bed.
Here is my homez file:

[[language]]
; homez.g
; called to home the Z axis
;
; generated by RepRapFirmware Configuration Tool on Sat Oct 21 2017 21:17:08 GMT-0500 (Central Daylight Time)

; Lift Z relatively to current position
G91
G1 Z5 F6000

; Back to absolute positioning
G90

; Go to first bed probe point and home the Z axis
G1 X30 Y27.6 F6000
G30

; Uncomment the following lines to lift Z after probing
;G91
;G1 Z5 F100
;G90

Hey guys so I am driving myself crazy trying to solve this.

When printing the 20mm calibration cube everything goes perfect except the start and end.

FYI: The warping is from the macro camera lens I put on my phone to take the picture, the print is perfectly square.

The top and bottom solid layers are always wider than the rest of the print.

• Height: 20.01

• Width: 20.05

• Height: 20.01

Simplify 3D Settings
https://imgur.com/a/j4CMt

[[language]]
; General preferences
M111 S0 ; Debugging off
G21 ; Work in millimetres
G90 ; Send absolute coordinates...
M83 ; ...but relative extruder moves
M555 P2 ; Set firmware compatibility to look like Marlin

M667 S1 ; Select CoreXY mode
M208 X0 Y0 Z0 S1 ; Set axis minima
M208 X300 Y275 Z300 S0 ; Set axis maxima

; Endstops
M574 X1 Y2 Z2 S0 ; Define active low and unused microswitches
M558 P1 X0 Y0 Z0 H5 F120 T6000 ; Set Z probe type to switch, the axes for which it is used and the probe + travel speeds
G31 P600 X0 Y0 Z300 ; Set Z probe trigger value, offset and trigger height

; Drives
M569 P0 S0 ; Drive 0 goes forwards
M569 P1 S0 ; Drive 1 goes forwards
M569 P2 S0 ; Drive 2 goes forwards
M569 P3 S1 ; Drive 3 goes forwards
M350 X16 Y16 Z16 E16 I0 ; Configure microstepping without interpolation
M92 X99.9814 Y99.9814 Z1600 E151 ; Set steps per mm
M566 X900 Y900 Z12 E120 ; Set maximum instantaneous speed changes (mm/min)
M203 X6000 Y6000 Z180 E1200 ; Set maximum speeds (mm/min)
M201 X500 Y500 Z250 E250 ; Set accelerations (mm/s^2)
M906 X800 Y800 Z800 E800 I30 ; Set motor currents (mA) and motor idle factor in per cent
M84 S30 ; Set idle timeout

; Heater PID Tuning
M307 H0 A163.8 C660.0 D5.9 S1.00 B0
M307 H1 A410.9 C206.2 D5.6 S1.00 B0

; Heaters
M143 S280 ; Set maximum heater temperature to 260C
M301 H0 S1.00 P10 I0.1 D200 T0.4 W180 B30 ; Use PID on bed heater (may require further tuning)
M305 P0 T100000 B4138 C0 R4700 ; Set thermistor + ADC parameters for heater 0
M305 P1 T100000 B4719 C7.08e-8 R4700 ; Set thermistor + ADC parameters for heater 1

; Tools
M563 P0 D0 H1 ; Define tool 0
G10 P0 X0 Y0 ; Set tool 0 axis offsets
G10 P0 R0 S0 ; Set initial tool 0 active and standby temperatures to 0C

; Network
M550 PPlexDuet ; Set machine name
M552 P0.0.0.0 S1 ; Enable network and acquire dynamic address via DHCP

; Fans
M106 P0 S0.3 I0 F500 H-1 ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned off
M106 P1 S1 I0 F500 H T45 ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned on
M106 P2 S1 I0 F500 H T45 ; Set fan 2 value, PWM signal inversion and frequency. Thermostatic control is turned on