Message "Error: Homing failed" even though homing worked

TDK

I'm getting the error message "Error: Homing failed" when issuing a "G28" command with no arguments. Despite the error message, the printer homes correctly.

If I issue a "G28 X" or "G28 Y" or "G28 Z" command, the printer homes the corresponding axis and no error message is output.

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9/6/2020, 11:02:36 AM	G28
Error: Homing failed
9/6/2020, 11:01:57 AM	G28 Z
9/6/2020, 11:01:46 AM	G28 Y
9/6/2020, 11:01:39 AM	G28 X

This is on a CoreXY machine, but I'm also seeing the same thing on my Ender3 cartesian.

What am I doing wrong?

M98 P"0:/macros/FIRMWARE_INFO_M115"
FIRMWARE_NAME: RepRapFirmware for Duet 3 MB6HC FIRMWARE_VERSION: 3.1.1 ELECTRONICS: Duet 3 MB6HC v1.01 or later FIRMWARE_DATE: 2020-05-19b2

; homeall.g
; called to home all axes

G28 X
G28 Y
G28 Z

; homex.g
; called to home the X axis

M400
M913 X30 Y30
M915 X Y S1 R2
M400
G92 X0
G91
G1 H2 Z2 F300
G1 H1 X-500 F4800
G1 X20 F2400
G1 H2 Z-2 F300
G90
M400
M913 X100 Y100
M400

; offset by 1mm
G0 X1 F6000
G92 X0

; homey.g
; called to home the Y axis

G90
G0 X0 F4800
M400
M913 X30 Y30
M915 X Y S1 R2
M400
G92 Y0
G91
G1 H2 Z2 F300
G1 H1 Y500 F2400
G1 Y-20 F2400
G1 H2 Z-2 F300
G90
M400
M913 X100 Y100
M400

; offset by 1mm
G0 Y1 F6000
G92 Y0

; homez.g
; called to home the Z axis

G91                ; relative position
G1 Z10 H2 F600
G90                ; absolute position
G1 X0 Y-24 F6000   ; move to middle of bed plus probe offsets
M401               ; deploy probe
G30                ; home z0
M402               ; retract probe
G1 Z10 F600        ; Move z up a little

; Configuration file for Duet 3 (firmware version 3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.1.4 on Wed Jul 29 2020 21:58:06 GMT-0400 (Eastern Daylight Time)

; General preferences
G90                                          ; send absolute coordinates...
M83                                          ; ...but relative extruder moves
M550 P"TankXY"                               ; set printer name
M669 K1                                      ; select CoreXY mode

; 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 backwards
M569 P0.1 S0                                 ; physical drive 0.1 goes backwards
M569 P0.2 S0                                 ; physical drive 0.2 goes backwards
M569 P0.3 S0                                 ; physical drive 0.3 goes backwards
M569 P0.4 S0                                 ; physical drive 0.4 goes backwards
M569 P0.5 S1                                 ; physical drive 0.5 goes forwards

M584 X0.1 Y0.0 Z0.2:0.3:0.4 E0.5             ; set drive mapping
M350 E16 Z16 I1                              ; configure microstepping without interpolation
M350 X16 Y16 I1                              ; configure microstepping with interpolation
M92 X80.00 Y80.00 Z1600.00 E420.00           ; set steps per mm
; M350 X256 Y256 Z256 I0
M566 X900.00 Y900.00 Z12.00 E120.00          ; set maximum instantaneous speed changes (mm/min)
; max Z speed set to 300 to avoid resonance on lead screws
M203 X6000.00 Y6000.00 Z300.00 E1200.00      ; set maximum speeds (mm/min)
M201 X500.00 Y500.00 Z250.00 E250.00         ; set accelerations (mm/s^2)
M906 X1000 Y1000 Z1000 E1000 I30             ; set motor currents (mA) and motor idle factor in per cent
M84 S15                                      ; Set idle timeout

; Axis Limits
; X range = 214mm true range, limited to 212mm
; Y range = 218mm, limited to 216mm
M208 X-106 Y-108 Z0 S1                       ; set axis minima
M208 X106 Y108 Z220 S0                       ; set axis maxima

; Endstops
M574 X1 S3                                   ; configure sensorless endstop for low end on X
M574 Y2 S3                                   ; configure sensorless endstop for high end on Y

; BL-Touch probe
M558 P9 C"io7.in" H5 F300 T6000              ; set Z probe type to bltouch and the dive height + speeds
M950 S0 C"io7.out"                           ; create servo pin 0 for BLTouch
; to move print head closer to bed, increase Z value here
G31 X0 Y24 Z2.88 P500                       ; offset from hot end nozzle

; set up grid probing points
M557 X-75:75 Y-75:75 S37.5                   ; Define mesh grid

; Heaters
; S0 = bed thermistor
M308 S0 P"temp0" Y"thermistor" T100000 B4138 ; configure sensor 0 as thermistor on pin temp0
; H0 = bed heater
M950 H0 C"out0" T0                           ; create bed heater output on out0 and map it to sensor 0
M307 H0 B1 S1.00                             ; disable 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

; S1 = hot end thermistor
M308 S1 P"temp1" Y"thermistor" T100000 B4138 ; configure sensor 1 as thermistor on pin temp1
; H1 = hot end heater
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

; S2 = mcu temperature
M308 S2 Y"mcu-temp" A"MCU"

; Fans
; F0 = out9 = part cooling fan
; F1 = out6 = hot end heat sink fan
; F2 = out4 = case fan
; F3 = out5 = case fans

; set part cooling fan on out9
M950 F0 C"out9" Q25000
M106 P0 S0.0

; set hot end fan on out6
M950 F1 C"!out6" Q2000
; thermostatic control
M106 P1 T40:90 H1 S1.0

; F2 and F3 = case fans on out4 and out5
M950 F2 C"!out4" Q2000
M950 F3 C"!out5" Q2000
; thermostatic control
M106 P2 T50:80 H2 S1.0
M106 P3 T50:80 H2 S1.0

; Tools
M563 P0 S"Extruder" 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
M501                                         ; load saved parameters from non-volatile memory
T0                                           ; select first tool

I see that other people have had similar issues, but the proposed solutions do not work for me. In some cases, it's unclear if the issue was really solved:

https://forum.duet3d.com/topic/5538/homing-failed-error-even-though-it-succeeded
Solution: use "G30" instead of "G30 S-1", presumably worked

https://forum.duet3d.com/topic/15645/error-homing-failed-also-no-print-time-estimation-given
Soluton: none posted apart from update firmware, maybe it worked, maybe not.

https://forum.duet3d.com/topic/2970/error-homing-failed-on-any-g28-situation/11
Solution: update firmware, but then another user claims it isn't fixed.

Edit: corrected homeall.g script.

Veti

your home scripts are more complicated than they need to be

i would suggest that you start off with the homing scripts that the configurator creates.

i.e. you home z contian M401 and M402 which are not required on P9

TDK

I'm following the instructions here:
https://duet3d.dozuki.com/Wiki/Connecting_a_Z_probe

Which suggests the following for homez.g:

; homez.g
; called to home the Z axis

G91                ; relative positioning
G90                ; absoute position
M401               ; deploy probe
G1 X163 Y129 F1800 ; move to middle of bed plus probe offsets
G30                ; home z0
M402               ; retract probe

Are you saying that is incorrect?

I'll agree they are a bit complicated. Some of that is due to sensorless homing, some due to me wanting to offset coordinates by a few mm. I don't see how that would be causing the error.

I commented out M401 and M402. It still works, but the result (error message) is the same.

Veti

you mean the examples for the Touch-Mi probe which is a different probe to the bltouch?

jay_s_uk

Typically in your homeall file, you call the macro using M98 P"homez.g" rather than using G28 X

TDK

@jay_s_uk said in Message "Error: Homing failed" even though homing worked:

Typically in your homeall file, you call the macro using M98 P"homez.g" rather than using G28 X

This fixed the issue. I appreciate the response.

While searching, I came across this post as well:

https://forum.duet3d.com/topic/10468/homeall-g-content-cleanup

It seems using "G28" within homeall.g isn't really allowed (despite it working fine save the error message). I don't really agree with that implementation choice, but it is what it is. On to the next issue.

Phaedrux

Technically if you leave homeall.g blank it will then just execute homex homey and homez macros. Same goes for if it only homes 1 or 2 axis in homeall it will then call the homing file of whatever axis is not yet homed.

Calling G28 from within G28 can become recursive, so I guess it's not allowed.

TDK

@Phaedrux said in Message "Error: Homing failed" even though homing worked:

Technically if you leave homeall.g blank it will then just execute homex homey and homez macros. Same goes for if it only homes 1 or 2 axis in homeall it will then call the homing file of whatever axis is not yet homed.

This isn't the behavior I see. If I leave homeall.g blank, it does not execute any action and simply returns the error message "Error: Homing failed".

dc42

@Phaedrux said in Message "Error: Homing failed" even though homing worked:

Calling G28 from within G28 can become recursive, so I guess it's not allowed.

That's correct. RRF uses a global variable to track which axes need to be homed, so G28 may not be used recursively.

Phaedrux

@TDK said in Message "Error: Homing failed" even though homing worked:

Same goes for if it only homes 1 or 2 axis in homeall it will then call the homing file of whatever axis is not yet homed.

Well at least I'm sure this part is correct. I extrapolated to it homing all axis if the file was empty. I'll have to do some testing.

TDK

@Phaedrux said in Message "Error: Homing failed" even though homing worked:

@TDK said in Message "Error: Homing failed" even though homing worked:

Same goes for if it only homes 1 or 2 axis in homeall it will then call the homing file of whatever axis is not yet homed.

Well at least I'm sure this part is correct. I extrapolated to it homing all axis if the file was empty. I'll have to do some testing.

If I put only M98 P"homex.g" in the homeall.g file, then it does home the Y and Z axes after the X. So it seems you need to home at least something. And in this case, no error message is generated.

I guess this scheme makes sense if you want to combine X and Y homing into one operation in homeall.g, but then don't want to duplicate the homez.g code.