Cant home z to endstop



  • Hi guys, so received my duet yesterday and got it all set up, was fairly straight forward as im not exactly super computer literate.
    My issue is when I set up a profile in the online configurator I select no probe for z probe and normally open endstop switches, at this point I am unable to select z probe as an endstop as its greyed out due to my earlier selection. so far so good....well not quite, when I load the file into the duet and try to home z it wants me to manually move the axis to touch the bed. if I go into the homez.g file it is set up for z probe, same for home all.

    I have tride to copy the gcode from homey.g and change everything to z but still no luck. all I want it to do is home to the endstop.

    this is the homez.g file.

    ; homeall.g
    ; called to home all axes
    ;
    ; generated by RepRapFirmware Configuration Tool on Tue Jul 17 2018 23:03:17 GMT+0100 (GMT Summer Time)
    G91 ; relative positioning
    G1 Z5 F6000 S2 ; lift Z relative to current position
    G1 S1 X-305 Y-305 F1800 ; move quickly to X and Y axis endstops and stop there (first pass)
    G1 X5 Y5 F6000 ; go back a few mm
    G1 S1 X-305 Y-305 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
    ;G1 Z5 F100 S2 ; uncomment this line to lift the nozzle after homing



  • You also need to define Z axis homing in config.g, the same way as you have it for X and Y.
    Something like M574 X1 Y1 Z1 S0 ; Set active low endstops
    See here: https://duet3d.dozuki.com/Wiki/GCode#Section_M574_Set_endstop_configuration



  • I had previously done that but didn't work, below this there is something about mesh bed levelling, should I comment them out?

    ; Z-Probe
    M558 P0 H5 F120 T6000 ; Disable Z probe but set dive height, probe speed and travel speed
    M557 X15:285 Y15:285 S20 ; Define mesh grid



  • this is the bed.g file

    ; bed.g
    ; called to perform automatic bed compensation via G32
    ;
    ; generated by RepRapFirmware Configuration Tool on Tue Jul 17 2018 23:03:17 GMT+0100 (GMT Summer Time)
    M561 ; clear any bed transform
    G28 ; home all axes
    ; Probe the bed at 4 points
    G30 P0 X15 Y15 H0 Z-99999
    G30 P1 X15 Y285 H0 Z-99999
    G30 P2 X285 Y285 H0 Z-99999
    G30 P3 X285 Y15 H0 Z-99999 S

    this is the homeall.g file

    ; homeall.g
    ; called to home all axes
    ;
    ; generated by RepRapFirmware Configuration Tool on Tue Jul 17 2018 23:03:17 GMT+0100 (GMT Summer Time)
    G91 ; relative positioning
    G1 Z5 F6000 S2 ; lift Z relative to current position
    G1 S1 X-305 Y-305 F1800 ; move quickly to X and Y axis endstops and stop there (first pass)
    G1 X5 Y5 F6000 ; go back a few mm
    G1 S1 X-305 Y-305 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
    ;G1 Z5 F100 S2 ; uncomment this line to lift the nozzle after homing

    this is the config.g file

    ; Configuration file for Duet WiFi (firmware version 1.20 or newer)
    ; executed by the firmware on start-up
    ;
    ; generated by RepRapFirmware Configuration Tool on Tue Jul 17 2018 23:03:17 GMT+0100 (GMT Summer Time)

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

    ; Network
    M550 PMy printer ; Set machine name
    M551 pxxxxxxxxxxx ; Set password
    M552 S1 ; Enable network
    ;*** Access point is configured manually via M587
    M586 P0 S1 ; Enable HTTP
    M586 P1 S0 ; Disable FTP
    M586 P2 S0 ; Disable Telnet

    ; Drives
    M569 P0 S0 ; Drive 0 goes backwards
    M569 P1 S0 ; Drive 1 goes backwards
    M569 P2 S1 ; Drive 2 goes forwards
    M569 P3 S0 ; Drive 3 goes backwards
    M350 X16 Y16 Z16 E16 I1 ; Configure microstepping with interpolation
    M92 X80 Y80 Z400 E420 ; 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 X800 Y800 Z250 E250 ; Set accelerations (mm/s^2)
    M906 X800 Y900 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 X300 Y300 Z400 S0 ; Set axis maxima

    ; Endstops
    M574 X1 Y1 S0 ; Set active low endstops

    ; Z-Probe
    M558 P0 H5 F120 T6000 ; Disable Z probe but set dive height, probe speed and travel speed
    M557 X15:285 Y15:285 S20 ; 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

    ; 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



  • You can. If you do not define mesh leveling in home...g files, it will not trigger.
    Use this for homeall.g

    G91 ; relative positioning
    G1 Z5 F6000 S2 ; lift Z relative to current position
    G1 S1 X-305 Y-305 F1800 ; move quickly to X and Y axis endstops and stop there (first pass)
    G1 X5 Y5 F6000 ; go back a few mm
    G1 S1 X-305 Y-305 F360 ; move slowly to X and Y axis endstops once more (second pass)
    G1 S1 Z-305 F300 ; move quickly to Z axis endstop and stop there (first pass)
    G1 Z5 F6000 ; go back a few mm
    G1 S1 Z-305 F100 ; move slowly to Z axis endstop and stop there (first pass)
    G90 ; absolute positioning
    

    I am not too sure about the speeds for Z and the length of movement. Change them if you want. It should work.

    For homez.g use this:

    G91 ; relative positioning
    G1 Z5 F6000 S2 ; lift Z relative to current position
    G1 S1 X-305 F1800 ; move quickly to X and Y axis endstops and stop there (first pass)
    G1 S1 Z-305 F300 ; move quickly to Z axis endstop and stop there (first pass)
    G1 Z5 F6000 ; go back a few mm
    G1 S1 Z-305 F100 ; move slowly to Z axis endstop and stop there (first pass)
    G90 ; absolute positioning
    


  • @obeliks said in Cant home z to endstop:

    G91 ; relative positioning
    G1 Z5 F6000 S2 ; lift Z relative to current position
    G1 S1 X-305 F1800 ; move quickly to X and Y axis endstops and stop there (first pass)
    G1 S1 Z-305 F300 ; move quickly to Z axis endstop and stop there (first pass)
    G1 Z5 F6000 ; go back a few mm
    G1 S1 Z-305 F100 ; move slowly to Z axis endstop and stop there (first pass)
    G90 ; absolute positioning

    I DONT KNOW WHO YOU ARE, I DONT KNOW WHERE YOU ARE...….BUT I WILL FIND YOU.....AND I WILL KISS YOU.

    Seriously thanks, all sorted now just need to tweak speeds ect but im happy.



  • @scottpickstock Haha, please don't.



  • @obeliks said in Cant home z to endstop:

    @scottpickstock Haha, please don't.

    Don't worry, I couldn't home my z axis, I have no hope of homing in on you haha. cheers again.


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