DuetWifi delta homing doesn't complete



  • Hi,
    I've built a large kossel based on dc42's design. After wiring everything and running G28 to home I've noticed that it never completes.
    My config.g:

    [[language]]
    ; Configuration file for Duet WiFi (firmware version 1.17 to 1.19)
    ; executed by the firmware on start-up
    ;
    ; generated by RepRapFirmware Configuration Tool on Fri Dec 22 2017 18:14:30 GMT+0200 (EET)
    
    ; General preferences
    M111 S0                                                                ; Debugging off
    G21                                                                    ; Work in millimetres
    G90                                                                    ; Send absolute coordinates...
    M83                                                                    ; ...but relative extruder moves
    M555 P1                                                                ; Set firmware compatibility to look like RepRapFirmare
    
    ;*** The homed height is deliberately set too high in the following - you will adjust it during calibration.
    M665 R200 L180 B150 H720                                               ; 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
    M208 Z0 S1                                                             ; Set minimum Z
    
    ; Endstops
    M574 X2 Y2 Z2 S1                                                       ; Set active high endstops
    M558 P5 R0.4 X0 Y0 Z0 H5 F120 T6000                                    ; Set Z probe type to effector, the axes for which it is used and the dive height + speeds
    G31 P100 X0 Y0 Z-0.1                                                   ; Set Z probe trigger value, offset and trigger height
    M557 R150 S20                                                          ; Define mesh grid
    
    ; Drives
    M569 P0 S0                                                             ; Drive 0 goes backward
    M569 P1 S0                                                             ; Drive 1 goes backward
    M569 P2 S0                                                             ; Drive 2 goes backward
    M569 P3 S0                                                             ; Drive 3 goes backward
    M350 X16 Y16 Z16 E16 I1                                                ; Configure microstepping with interpolation
    M92 X200 Y200 Z200 E663                                                ; Set steps per mm
    M566 X1200 Y1200 Z1200 E1200                                           ; Set maximum instantaneous speed changes (mm/min)
    M203 X18000 Y18000 Z18000 E1200                                        ; Set maximum speeds (mm/min)
    M201 X1000 Y1000 Z1000 E1000                                           ; 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
    
    ; Heaters
    M305 P0 T100000 B3950 R4700 H0 L0                                      ; Set thermistor + ADC parameters for heater 0
    M143 H0 S130                                                           ; Set temperature limit for heater 0 to 130C
    M305 P1 T100000 B4388 R4700 H0 L0                                      ; Set thermistor + ADC parameters for heater 1
    M143 H1 S280                                                           ; Set temperature limit for heater 1 to 280C
    
    ; 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
    
    ; Network
    M550 Pdelta-dc42                                                       ; Set machine name
    M552 S1                                                                ; Enable network
    M586 P0 S1                                                             ; Enable HTTP
    M586 P1 S0                                                             ; Disable FTP
    M586 P2 S0                                                             ; Disable Telnet
    
    ; Fans
    M106 P0 S1 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 H-1                                                 ; Set fan 2 value, PWM signal inversion and frequency. Thermostatic control is turned off
    
    ; Custom settings are not configured
    
    ```homedelta.g:
    

    ; homedelta.g
    ; called to home all towers on a delta printer
    ;
    ; generated by RepRapFirmware Configuration Tool on Fri Dec 22 2017 18:14:30 GMT+0200 (EET)
    G91 ; relative positioning
    G1 S1 X725 Y725 Z725 F1800 ; move all towers to the high end stopping at the endstops (first pass)
    G1 X-5 Y-5 Z-5 F1800 S2 ; go down a few mm
    G1 S1 X10 Y10 Z10 F1000 ; 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

    I've also noticed that M114 reports position as Nan: [c]X: nan Y: nan Z: nan E0: 0.0 E1: 0.0 E2: 0.0 E3: 0.0 E4: 0.0 E5: 0.0 E6: 0.0 E7: 0.0 E8: 0.0 Count 0 0 0 User nan nan 100.0[/c]
    Endstop switches are NC type and they report state change properly both in DWC and when queried via M119
    What else can I check to figure this one out?

  • administrators

    The combination of R and L parameters in your M665 command is not feasible. If it's based on my design then the L parameter is much too small.



  • Thank you. That was it.


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