Extruder is not working

  • I have been struggling with this. My extruder stepper, heater and thermister does not respond. I have confirmed everything is in the right port. The Duet 3 is powered by a Meanwell 24volt 320 watt PS. The extruder is a 24volt configuration. Thanks for any help you can provide. Below is my Gcode, all of it:

    ; Configuration file for Duet 3 (firmware version 3)
    ; executed by the firmware on start-up
    ; generated by RepRapFirmware Configuration Tool v2.1.8 on Thu Feb 20 2020 16:55:51 GMT-0800 (Pacific Standard Time)

    ; General preferences
    G90 ; send absolute coordinates...
    M83 ; ...but relative extruder moves
    M550 P"MYTH3D" ; set printer name

    M667 S1 ; select CoreXY mode

    ; Networking
    ;;;M552 P192.168.1.14 S1 ; Use Ethernet with a static IP
    ;;;M553 P255.255.255.0 ; Netmask
    ;;;M554 ; Gateway
    M586 P1 S1 ; Enable FTP
    M586 P2 S1 ; Enable 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 S0 ; physical drive 0.2 goes backwards
    M569 P0.5 S1 ; physical drive 0.5 goes forwards
    M569 P0.3 S0 ; physical drive 0.3 goes backwards
    M569 P0.4 S0 ; physical drive 0.4 goes backwards
    M584 X0.0 Y0.1 Z0.2 E0.5:0.3:0.4 ; set drive mapping
    M350 X16 Y16 Z16 E16:16:16 I1 ; configure microstepping with interpolation
    M92 X80.00 Y80.00 Z4000.00 E420.00:420.00:420.00 ; set steps per mm
    M566 X900.00 Y900.00 Z12.00 E120.00:120.00:120.00 ; set maximum instantaneous speed changes (mm/min)
    M203 X6000.00 Y6000.00 Z180.00 E1200.00:1200.00:1200.00 ; set maximum speeds (mm/min)
    M201 X500.00 Y500.00 Z20.00 E250.00:250.00:250.00 ; set accelerations (mm/s^2)
    M906 X800 Y800 Z800 E800:800:800 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 Z500 S0 ; set axis maxima

    ; Endstops
    M574 X2 S1 P"io1.in" ; configure active-high endstop for high end on X via pin io1.in
    M574 Y1 S1 P"io2.in" ; configure active-high endstop for low end on Y via pin io2.in

    ; Z-Probe
    M558 P0 H5 F120 T6000 ; disable Z probe but set dive height, probe speed and travel speed
    M557 X15:215 Y15:195 S20 ; define mesh grid

    ; Heaters
    M308 S0 P"temp0" Y"thermistor" T100000 B4138 ; configure sensor 0 as thermistor on pin temp0
    M950 H0 C"out1" T0 ; create nozzle heater output on out1 and map it to sensor 0
    M143 H0 S280 ; set temperature limit for heater 0 to 280C
    M307 H0 B0 S1.00 ; disable bang-bang mode for heater and set PWM limit

    ; Fans
    M950 F0 C"out7" Q500 ; create fan 0 on pin out7 and set its frequency
    M106 P0 S0 H T45 ; set fan 0 value. 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
    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

  • @Weevil said in Extruder is not working:

    M950 H0 C"out1" T0 ; create nozzle heater output on out1 and map it to sensor 0
    M563 P0 D0 H1 F0 ; define tool 0

    You've defined Heater 0 and asked the tool to use Heater 1.

    Also, are you selecting tool 0 anywhere? It is OK on a single tool printer to put T0 near the very end of config.g

  • @Danal Thanks, I have made some changes but the extruder heater is still not responding. PanelDue shows the temp for the extruder at -273.1. I try to set it but it just jumps back. The Web interface shows Heater as undefined under Tools. This is the new code:

    ; Heaters
    M308 S0 P"temp0" Y"thermistor" T100000 B4138
    M950 H0 C"out1" T0
    M143 H0 S280
    M307 H0 B0 S1.00

  • -273.1 is the "magic number" that means a temperature sensor is completely unplugged.

    So wherever you have that thermistor plugged in, it is not plugged into: M308 S0 P"temp0" Y"thermistor" T100000 B4138 ; configure sensor 0 as thermistor on pin temp0

    or there is a broken wire, or bad crimp, or etc.

    You said this is Duet 3 hardware, correct?

    Temp0 would be here, and is not polarized:


  • Also, what you showed as a change does not resolve the heater mismatch.

    You must do one of two things (not both):

    M950 must have H1


    M563 must have H0

  • @Danal That did the trick. Thanks!

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