Trouble homing Y axis

eegroeg

Hi would apricate if anyone is able to help me on this one.

My printer has been running fine and after coming back from a break I am now having issues where my Y axis won't home. When I press home the bed nudges roughly 0.5 in the opposite direction to what it should do, then stops and thinks it's homed. I have tried swapping the driver and used a different axis to test this but this also does the same thing. When it has been "homed" I can move the bed backwards and forwards via the web control, it just wont home in the right direction or travel more than 0.5 and move to the end stop. Please see videos below which I hope help.

https://we.tl/t-8E0ymSD6OT

; Configuration file for Duet 3 (firmware version 3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.3.0 on Sun Aug 15 2021 14:13:39 GMT+0100 (British Summer Time)

; General preferences
G90                                                   ; send absolute coordinates...
M83                                                   ; ...but relative extruder moves
M550 P"My Printer"                                    ; set printer name

; Network
M552 P0.0.0.0 S1                                      ; enable network and acquire dynamic address via DHCP
M586 P0 S1                                            ; enable HTTP
M586 P1 S0                                            ; disable FTP
M586 P2 S0                                            ; disable Telnet

; Drives
M569 P0.0 S1                                          ; physical drive 0.0 goes forwards
M569 P0.1 S1                                          ; physical drive 0.1 goes forwards
M569 P0.2 S1                                          ; physical drive 0.2 goes forwards
M569 P0.4 S0                                          ; physical drive 0.4 goes forwards
M584 X0.0 Y0.1 Z0.2:0.3 E0.4                          ; set drive mapping
M350 X16 Y16 Z16 E16 I1                               ; configure microstepping with interpolation
M92 X160.00 Y160.00 Z5120.00 E873.08                  ; set steps per mm
M566 X900.00 Y900.00 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 X500.00 Y500.00 Z20.00 E250.00                   ; 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 X500 Y500 Z750 S0                                ; set axis maxima

; Endstops
M574 X1 S1 P"io0.in"                                  ; configure active-high endstop for low end on X via pin io0.in
M574 Y1 S1 P"io1.in"                                  ; configure active-high endstop for low end on Y via pin io1.in
M574 Z1 S2 P"io7.in"                                  ; configure Z-probe endstop for low end on Z

; Z-Probe
M950 S0 C"io7.out"                                    ; create servo pin 0 for BLTouch
M558 P9 C"^io7.in" H4 F120 T6000                      ; set Z probe type to bltouch and the dive height + speeds
G31 P500 X37.5 Y10 Z1.4                               ; set Z probe trigger value, offset and trigger height
M557 X2.5:460 Y2.5:430 S40                                ; define mesh grid

; Heaters
;M308 S0 P"temp0" Y"thermistor" T100000 B4138          ; configure sensor 0 as thermistor on pin temp0
;M950 H0 C"out0" T0                                    ; create bed heater output on out0 and map it to sensor 0
;M307 H0 B1 S1.00                                      ; enable bang-bang mode for the bed heater and set PWM limit
;M140 H0                                               ; map heated bed to heater 0
;M143 H0 S120                                          ; set temperature limit for heater 0 to 120C
M308 S1 P"temp1" Y"thermistor" T100000 B4725 C7.06e-8 ; configure sensor 1 as thermistor on pin temp1
M950 H1 C"out1" T1                                    ; create nozzle heater output on out1 and map it to sensor 1
M307 H1 B0 S1.00                                      ; disable bang-bang mode for heater  and set PWM limit
M143 H1 S280                                          ; set temperature limit for heater 1 to 280C

; Fans
M950 F0 C"out4" Q500                                  ; create fan 0 on pin out4 and set its frequency
M106 P0 S0 H-1                                        ; set fan 0 value. Thermostatic control is turned off
M950 F1 C"out5" Q500                                  ; create fan 1 on pin out5 and set its frequency
M106 P1 S1 H1 T45                                     ; set fan 1 value. 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

; Miscellaneous
M911 S10 R11 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000"    ; set voltage thresholds and actions to run on power loss

; homex.g
; called to home the X axis
;
; generated by RepRapFirmware Configuration Tool v3.3.0 on Sun Aug 15 2021 14:13:39 GMT+0100 (British Summer Time)
G91               ; relative positioning
G1 H2 Z5 F6000    ; lift Z relative to current position
G1 H1 X-505 F1800 ; move quickly to X axis endstop and stop there (first pass)
G1 H2 X5 F6000    ; go back a few mm
G1 H1 X-505 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 v3.3.0 on Sun Aug 15 2021 14:13:39 GMT+0100 (British Summer Time)
G91               ; relative positioning
G1 H2 Z5 F6000    ; lift Z relative to current position
G1 H1 Y-500 F1800 ; move quickly to Y axis endstop and stop there (first pass)
G1 H2 Y5 F6000    ; go back a few mm
G1 H1 Y-505 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 v3.3.0 on Sun Aug 15 2021 14:13:39 GMT+0100 (British Summer Time)
G91              ; relative positioning
G1 H2 Z5 F6000   ; lift Z relative to current position
G90              ; absolute positioning
G1 X15 Y15 F6000 ; go to first probe point
G30              ; home Z by probing the bed

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

; homeall.g
; called to home all axes
;
; generated by RepRapFirmware Configuration Tool v3.3.0 on Sun Aug 15 2021 14:13:39 GMT+0100 (British Summer Time)
G91                     ; relative positioning
G1 H2 Z5 F6000          ; lift Z relative to current position
G1 H1 X-505 Y-505 F1800 ; move quickly to X and Y axis endstops and stop there (first pass)
G1 H2 X5 Y5 F6000       ; go back a few mm
G1 H1 X-505 Y-505 F360  ; move slowly to X and Y axis endstops once more (second pass)
G90                     ; absolute positioning
G1 X15 Y15 F6000        ; go to first bed probe point and home Z
G30                     ; home Z by probing the bed

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

jay_s_uk

@eegroeg check the output of M119 for both the endstop trigger and not triggered. It should change. If it doesn't, you have a wiring issue

fcwilt

@eegroeg said in Trouble homing Y axis:

roughly 0.5 in the opposite direction

Question: 0.5 what?

In your Y homing file you have the typical first move toward the endstop, then the second move back a bit, then the third move toward the endstop.

If for some reason the endstop appears to the firmware as triggered (when it should not be) then the first and third moves will not take place, only the second move.

Are you seeing that 5mm backwards move?

Frederick

eegroeg

@jay_s_uk Thanks Jay, the M119 is a useful one to know! found the issue.

fcwilt

@eegroeg said in Trouble homing Y axis:

@jay_s_uk Thanks Jay, the M119 is a useful one to know! found the issue.

You can also check the state of endstops (and lots of others things) in the DWC Object Model viewer.

Frederick