Z-probe not moving down to touch the bed



  • Hi guys,

    I am new here and looking forward to contribute.

    I have an FLSun QQ-S Pro and installed a DUET 2 ethernet this week. Currently I have 2 issues. Homing & Probing
    Homing;
    When I press "home all axis" and the printer has to move a larger distance. It stops homing after the first endstop is triggered. After I press it a second time it homes on all Endstops. Suggestions?
    Probing;
    I have the Z-probe connected and everything works almost as expected. Except for the triggering move. The probe moves across the bed without moving downward to actually click the trigger. Suggestions?

    My config.g
    *; Configuration file for Duet WiFi (firmware version 2.03)
    ; executed by the firmware on start-up
    ;
    ; generated by RepRapFirmware Configuration Tool v2.1.8 on Fri May 29 2020 13:42:29 GMT+0200 (Midden-Europese zomertijd)

    ; General preferences
    G90 ; send absolute coordinates...
    M83 ; ...but relative extruder moves
    M550 P"QQ-S PRO" ; set printer name
    M665 R140.8 L280 B130 H450 ; Set delta radius, diagonal rod length, printable radius and homed height
    M666 X0 Y0 Z0 ; put your endstop adjustments here, or let auto calibration find them

    ; 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 S0 ; physical drive 0 goes backwards
    M569 P1 S0 ; physical drive 1 goes backwards
    M569 P2 S0 ; physical drive 2 goes backwards
    M569 P3 S1 ; physical drive 3 goes forwards
    M584 X0 Y1 Z2 E3 ; set drive mapping
    M350 X16 Y16 Z16 E16 I1 ; configure microstepping with interpolation
    M92 X80.00 Y80.00 Z80.00 E663.00 ; set steps per mm
    M566 X1200.00 Y1200.00 Z1200.00 E1200.00 ; set maximum instantaneous speed changes (mm/min)
    M203 X18000.00 Y18000.00 Z18000.00 E1200.00 ; set maximum speeds (mm/min)
    M201 X1000.00 Y1000.00 Z1000.00 E1000.00 ; set accelerations (mm/s^2)
    M906 X1000 Y1000 Z1000 E800 I30 ; set motor currents (mA) and motor idle factor in per cent
    M84 S30 ; Set idle timeout

    ; Axis Limits
    M208 Z0 S1 ; set minimum Z

    ; Endstops
    M574 X2 Y2 Z2 S1 ; set active high endstops

    ; Z-Probe
    M558 P4 H0 F120 T3000 I1 ; set Z probe type to switch and the dive height + speeds
    G31 P500 X0 Y0 Z16.200 ; set Z probe trigger value, offset and trigger height
    M557 R120 S20 ; define mesh grid

    ; Heaters
    M307 H0 B0 S1.00 ; disable bang-bang mode for the bed heater and set PWM limit
    M305 P0 T100000 B4138 R4700 ; set thermistor + ADC parameters for heater 0
    M143 H0 S120 ; set temperature limit for heater 0 to 120C
    M305 P1 T100000 B4138 R4700 ; set thermistor + ADC parameters for heater 1
    M143 H1 S280 ; set temperature limit for heater 1 to 280C

    ; Fans
    M106 P0 S0 I0 F500 H1 T45 ; set fan 0 value, PWM signal inversion and frequency. 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
    T0 ; select first tool*

    My Bed.g
    *; bed.g
    ; called to perform automatic delta calibration via G32
    ;
    ; generated by RepRapFirmware Configuration Tool v2.1.8 on Fri May 29 2020 13:42:29 GMT+0200 (Midden-Europese zomertijd)
    M561 ; clear any bed transform
    G28 ; home all towers
    ; Probe the bed at 3 peripheral and 3 halfway points, and perform 6-factor auto compensation
    ; Before running this, you should have set up your Z-probe trigger height to suit your build, in the G31 command in config.g.
    G30 P0 X0 Y84.9 H-5 Z-99999
    G30 P1 X73.53 Y-42.45 H0 Z-99999
    G30 P2 X-73.53 Y-42.45 H-10 Z-99999
    G30 P3 X0 Y42.4 H0 Z-99999
    G30 P4 X36.72 Y-21.2 H-10 Z-99999
    G30 P5 X-36.72 Y-21.2 H0 Z-99999
    G30 P6 X0 Y0 H0 Z-99999 S6
    ; Use S-1 for measurements only, without calculations. Use S4 for endstop heights and Z-height only. Use S6 for full 6 factors
    ; If your Z probe has significantly different trigger heights depending on XY position, adjust the H parameters in the G30 commands accordingly. The value of each H parameter should be (trigger height at that XY position) - (trigger height at centre of bed)
    *


  • Moderator

    Please post your homedelta.g file.

    What firmware version are you using?

    What type of probe is it?

    What do you have in your slicer start gcode?



  • @Phaedrux Thanks for your reply!

    ; homedelta.g
    ; called to home all towers on a delta printer
    ;
    ; generated by RepRapFirmware Configuration Tool v2.1.8 on Fri May 29 2020 13:42:29 GMT+0200 (Midden-Europese zomertijd)
    G91 ; relative positioning
    G1 H1 X450 Y450 Z450 F1800 ; move all towers to the high end stopping at the endstops (first pass)
    G1 H2 X-5 Y-5 Z-5 F1800 ; go down a few mm
    G1 H1 X10 Y10 Z10 F360 ; move all towers up once more (second pass)
    G1 Z-5 F6000 ; move down a few mm so that the nozzle can be centred
    G90 ; absolute positioning
    G1 X0 Y0 F6000 ; move X+Y to the centre

    What firmware version are you using?
    firmware version 2.03
    What type of probe is it?
    It is a digital switch that comes standard with the printer. So i don't level before every print as the bed on my printer is fixed.
    What do you have in your slicer start gcode?
    Not there yet, I just put in the board and trying to get it to work. I haven't printed anyhting yet.



  • @Brouwi
    does it flash as triggered in DWC dashboard then move ? as you may need to invert the switch
    Also your dive height is 0 set it to 25
    M558 P4 H0 F120 T3000 I1


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