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    DuetWifi delta homing doesn't complete

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    • cdoeundefined
      cdoe
      last edited by

      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?
      1 Reply Last reply Reply Quote 0
      • dc42undefined
        dc42 administrators
        last edited by

        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.

        Duet WiFi hardware designer and firmware engineer
        Please do not ask me for Duet support via PM or email, use the forum
        http://www.escher3d.com, https://miscsolutions.wordpress.com

        1 Reply Last reply Reply Quote 0
        • cdoeundefined
          cdoe
          last edited by

          Thank you. That was it.

          1 Reply Last reply Reply Quote 0
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