Z Axis not homing endstops Ender 3

[A Former User]

Dear Duet3D team

I want to ask for your help to set correctly the setup of my Z axis in my Ender 3 using the Duet3D Mini 5

Preconditions:

• The Ender 3 was working correctly before with the IR Probe from Duet installed in Z axis.
• I have removed from the board the IR Probe because I have installed the Bondtech extruder DDXv3 and at the moment I dont have the option to install the IR probe in the new setup
• I have now the original config.g as was before without the IR Probe to use the original mechanical endswitch from the Ender 3 for the Z Axis.

The problem:

• When I homing all the Axis, the Z is going up 5mm and I can read that the new tool position for my Z it is set to 0. If I try again the Z is going again 5mm up and the tool position for the Z is again in 0.

• The Z axis is not moving to the stop end switch, just the X and Y is moving correctly to the home position where the end stop switch are.

I dont have errors reported by the system in the console. I did try multiple configurations with G92 Z0 and 91 relative and absolute position and other options but still my Z axis just going up 5mm and declared the new tool position as 0 when in reality is probably 25 mm up from the bed.

I have removed the option in Homeall.g for G1 H2 Z5 F6000 and this help to stop moving the Z axis the 5mm up, but still the problem to find the way how the Z axis is not travelling to the home position where the endstop switch is originally.

Here is my config.g

; Configuration file for Duet 3 Mini 5+ (firmware version 3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.2.3 on Tue Jun 22 2021 17:40:51 GMT+0200 (Mitteleuropäische Sommerzeit)
 
; General preferences
G90                                                ; send absolute coordinates...
M83                                                ; ...but relative extruder moves
M550 P"My Printer"                                 ; set printer name
 
; Network
M551 P"1970"                                       ; set password
M552 S1                                            ; enable network
M586 P0 S1                                         ; enable HTTP
M586 P1 S0                                         ; disable FTP
M586 P2 S0                                         ; disable Telnet
 
; Drives
M569 P0.0 S0                                       ; physical drive 0.0 goes backwards
M569 P0.1 S0                                       ; physical drive 0.1 goes backwards
M569 P0.2 S1                                       ; physical drive 0.2 goes forwards
M569 P0.3 S0                                       ; physical drive 0.3 goes backwards
M584 X0.0 Y0.1 Z0.2 E0.3                           ; set drive mapping
M350 X16 Y16 Z16 E16 I1                            ; configure microstepping with interpolation
M92 X80.00 Y80.00 Z400.00 E93.00                   ; set steps per mm
M566 X900.00 Y900.00 Z60.00 E300.00                ; set maximum instantaneous speed changes (mm/min)
M203 X6000.00 Y6000.00 Z600.00 E3600.00            ; set maximum speeds (mm/min)
M201 X500.00 Y500.00 Z200.00 E2500.00              ; set accelerations (mm/s^2)
M906 X600 Y600 Z600 E900 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 X235 Y235 Z260 S0                             ; set axis maxima
 
 
; Endstops
M574 X1 S1 P"io5.in"                               ; configure active-high endstop for low end on X via pin io5.in
M574 Y1 S1 P"io6.in"                               ; configure active-high endstop for low end on Y via pin io6.in
M574 Z1 S1 P"io2.in"                               ; configure active-high endstop for low end on Z via pin io2.in
 
; Z-Probe
M558 P0 H5 F120 T6000                              ; disable Z probe but set dive height, probe speed and travel speed
M557 X20:200 Y20:200 S10                           ; define mesh grid
 
; Heaters
M308 S0 P"temp0" Y"thermistor" T98801 B4185        ; 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 B0 S1.00                                   ; disable bang-bang mode for the bed heater and set PWM limit
M140 H0                                            ; map heated bed to heater 0
M143 H0 S90                                        ; set temperature limit for heater 0 to 90C
M308 S1 P"temp1" Y"thermistor" T98801 B4185        ; 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"out3" Q500                               ; create fan 0 on pin out3 and set its frequency
M106 P0 C"PartCool" S0 H-1                         ; set fan 0 name and value. Thermostatic control is turned off
M950 F1 C"out4" Q500                               ; create fan 1 on pin out4 and set its frequency
M106 P1 C"HotEnd" S1 H1:0 T45                      ; set fan 1 name and value. Thermostatic control is turned on
M950 F2 C"out5" Q500                               ; create fan 2 on pin out5 and set its frequency
M106 P2 C"CaseFan" S1 H1:0 T45                     ; set fan 2 name and value. Thermostatic control is turned on
 
; Tools
M563 P0 S"Hotend" 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
M575 P1 S1 B57600                                  ; enable support for PanelDue
M501                                               ; load saved parameters from non-volatile memory
M911 S10 R11 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000" ; set voltage thresholds and actions to run on power loss
T0                                                 ; select first tool
 
 

Here is my Homeall.g

; homeall.g
; called to home all axes
;
; generated by RepRapFirmware Configuration Tool v3.2.3 on Tue Jun 22 2021 17:40:51 GMT+0200 (Mitteleuropäische Sommerzeit)
G91                     ; relative positioning
G1 H2 Z5 F6000          ; lift Z relative to current position
G1 H1 X-240 Y-240 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-240 Y-240 F360  ; move slowly to X and Y axis endstops once more (second pass)
G1 H1 Z-255 F6000        ; move Z down stopping at the endstop
G92 Z0               ; set Z position to axis minimum (you may want to adjust this)
G90                     ; absolute positioning
G1 X120 Y120 F6000 ; position probe at center of 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
 
 
 

My homex.g

; homex.g
; called to home the X axis
;
; generated by RepRapFirmware Configuration Tool v3.2.3 on Tue Jun 22 2021 17:40:51 GMT+0200 (Mitteleuropäische Sommerzeit)
G91               ; relative positioning
G1 H2 Z5 F6000    ; lift Z relative to current position
G1 H1 X-240 F1800 ; move quickly to X axis endstop and stop there (first pass)
G1 H2 X5 F6000    ; go back a few mm
G1 H1 X-240 F360  ; move slowly to X axis endstop once more (second pass)
G1 H2 Z-5 F6000   ; lower Z again
G90               ; absolute positioning
 
 

My homey.g

; homey.g
; called to home the Y axis
;
; generated by RepRapFirmware Configuration Tool v3.2.3 on Tue Jun 22 2021 17:40:51 GMT+0200 (Mitteleuropäische Sommerzeit)
G91               ; relative positioning
G1 H2 Z5 F6000    ; lift Z relative to current position
G1 H1 Y-240 F1800 ; move quickly to Y axis endstop and stop there (first pass)
G1 H2 Y5 F6000    ; go back a few mm
G1 H1 Y-240 F360  ; move slowly to Y axis endstop once more (second pass)
G1 H2 Z-5 F6000   ; lower Z again
G90               ; absolute positioning
 
 

My homez.g

; homez.g
; called to home the Z axis
;
; generated by RepRapFirmware Configuration Tool v3.2.3 on Tue Jun 22 2021 17:40:51 GMT+0200 (Mitteleuropäische Sommerzeit)
G91               ; relative positioning
G1 H2 Z4 F200
G90
G91
G1 H1 Z-265 F3600 ; move Z down until the endstop is triggered
G90
;G92 Z0 S1         ; set Z position to axis minimum (you may want to adjust this)
G92 Z.03              ; absolute positioning
 
; Uncomment the following lines to lift Z after probing
;G91              ; relative positioning
;G1 Z5 F100       ; lift Z relative to current position
 
 
 

I am sorry to bother you guys with so easy tasks, but before call for your help I have tried really hard for at least 8 hours trying to find the issue. I have read all your guidance in the Duet3D page and study the G code and M codes to understand my problem.

I have also reconfigured and uploaded the config files using the configtool for the reprap firmware that you have in your site for the Ender 3 but still not luck.

I hope you can help me
Thank you
Cheers
Javier

[jay_s_uk]

@javcab Have you confirmed the z endstop is working correctly using M119?

[A Former User]

@jay_s_uk Thanks for the reply
I have run the M119 and this is the result in the Console:

M119
Endstops - X: not stopped, Y: not stopped, Z: at min stop, Z probe: at min stop

Still the Z axis is not homing, when press the "Home All" the first to move is the Z axis 5mm up and then the Y and X homing correctly but never Homing the Z axis to the switch endstop.

[jay_s_uk]

@javcab said in Z Axis not homing endstops Ender 3:

Endstops - X: not stopped, Y: not stopped, Z: at min stop, Z probe: at min stop

if its saying at min stop and you don;t have the endstop triggered then its an issue with your wiring (assuming you're using the stock Ender 3 switch)

[A Former User]

@jay_s_uk Hi thanks again for the reply.

I can check again the wiring, I have the original Ender 3 switches.

Before I have the IR Probe Z configured and I removed, after that I have this problem. Let me check and keep you posted.

[A Former User]

@jay_s_uk You are an angel

Yes, the problem was one cable loose, I have pushed right in the mainboard and now Z is homing and all is good

Thank you