CORE XY D-BOT sensorless homing problem

[KnutK]

I'm setting up a sensorless homing on my D-BOT, but it seems like I am doing something wrong in my config files.

Here are my present config.g and homing files:

; Configuration file for Duet WiFi (firmware version 1.20 or newer)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool on Mon Mar 26 2018 16:38:56 GMT+0200 (W. Europe Daylight Time)

; General preferences
G90 ; Send absolute coordinates...
M83 ; ...but relative extruder moves

M667 S1 ; Select CoreXY mode

; Network
M550 PMy printer ; Set machine name
M552 S1 ; Enable network

; Drives
M569 P0 S1 ; Drive 0 goes forwards
M569 P1 S1 ; Drive 1 goes forwards
M569 P2 S1 ; Drive 2 goes forwards
M569 P3 S1 ; Drive 3 goes forwards
M569 P4 S1 ; Drive 4 goes forwards
M350 X16 Y16 Z16 E16 I1 ; Configure microstepping with interpolation
M92 X99 Y99 Z400 E416.35 ; 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 Y20 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

; Axis Limits
M208 X0 Y0 Z0 S1 ; Set axis minima
M208 X295 Y295 Z300 S0 ; Set axis maxima

;Individual Z motors
M584 X0 Y1 Z2:5:6
M671 X10:140:290 Y95:10:95 S1 ; leadscrews at left, middle and right

; Endstops
;M574 X1 Y2 S0 ; Set active low endstops
M574 X1 Y2 S3 ; Set active sensorless homing endstops

; Z-Probe
M574 Z1 S2 ; Set endstops controlled by probe
M558 P5 H5 F120 T6000 ; Set Z probe type to unmodulated and the dive height + speeds
G31 P500 X-10 Y75 Z1.32 ; Set Z probe trigger value, offset and trigger height
M557 X10:290 Y55:290 S35 ; Define mesh grid

; Heaters
M305 P0 T100000 B4138 C0 R4700 ; Set thermistor + ADC parameters for heater 0
M143 H0 S120 ; Set temperature limit for heater 0 to 120C
M305 P1 T100000 B4138 C0 R4700 ; Set thermistor + ADC parameters for heater 1
M143 H1 S280 ; Set temperature limit for heater 1 to 280C
M307 H7 A-1 C-1 D-1 ; Disable 7th Heater

; 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 H1 T45 ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned on
M106 P2 S1 I0 F500 H1 T45 ; Set fan 2 value, PWM signal inversion and frequency. Thermostatic control is turned on

; Tools
M563 P0 D0 H1 ; 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

; Automatic saving after power loss is not enabled

; Custom settings are not configured

; homeall.g
; called to home all axes
;
; generated by RepRapFirmware Configuration Tool on Mon Mar 26 2018 16:38:56 GMT+0200 (W. Europe Daylight Time)
M400 ;make sure everything has stopped before we make changes
M913 X50 Y50 ;Drop current to 50%
G91 ; relative positioning
G1 Z5 F1000 S2 ; lift Z relative to current position
G1 S1 X-290 Y290 F4000 ; move quickly to X or Y endstop and stop there (first pass)
G1 S1 X-290 ; home X axis
G1 S1 Y290 ; home Y axis
G1 X4 Y4 F6000 ; go back a few mm
G1 S1 X-290 F360 ; move slowly to X axis endstop once more (second pass)
G1 S1 Y290 ; then move slowly to Y axis endstop
G90 ; absolute positioning
G1 X150 Y150 F600 ; go to first bed probe point and home Z
G30 ; home Z by probing the bed
M400 ;make sure everything has stopped before we resett the motor currents
M913 X100 Y100 ; motor current back to 100
;G1 Z5 F100 S2 ; uncomment this line to lift the nozzle after homing

; homey.g
; called to home the y axis
;
M400 ; make sure everything has stopped before we make changes
M913 Y50 ; drop motor currents to 50%
M915 X Y S3 R0 ; set sensitivity to +3 unfiltered
G91 ; use relative positioning
G1 Z5 F6000 S2 ; Lift Z
G1 S1 Y295 F1800 ; move Y all the way left and stop at end
G1 Y-5 F1800 ; move to edge of glass
G1 Z-5 F6000 S2 ; lower Z again
G90 ; absolute positioning

; homex.g
; called to home the X axis
;
M400 ; make sure everything has stopped before we make changes
G1 Z5 F6000 S2 ; Lift Z
M913 X50 ; drop motor currents to 50%
M915 X Y S3 R0 ; set sensitivity to +3 unfiltered
G91 ; use relative positioning
G1 S1 X-295 F1800 ; move X all the way left and stop at end
G1 Z-5 F6000 S2 ; lower Z again
G90 ; absolute positioning

[dc42]

What isn't working? Have you tuned the stall detection threshold?