Duet Wifi extrusion nightmares.

  • Hi guys.

    I bought the board about 3 weeks ago and I still can't get a normal print from day 1 whatever I do. Everything is calibrated and tested with a caliper so steps per mm are alright. Here is a pic of my lats print. It started normally but then it made the first layer of infill which went fine and the second infill layer started with the inconsistency and then it started doing the top layer and did this mess. Mechanically everything is the same as with the previous board and I copied the extruder settings from marlin (it printed flawlessly on the previous board).
    The setup is a E3D V6 original with MK8 all metal extruder. These symptoms appear no matter the speed or the settings, it's like the board is handling the extrusion with a mind of it's own, regardless of my settings.

    Here are some pics:

    Here is my Config.g

    ; General preferences
    M111 S0 ; Debugging off
    G21 ; Work in millimetres
    G90 ; Send absolute coordinates…
    M83 ; ...but relative extruder moves
    M555 P2 ; Set firmware compatibility to look like Marlin
    M208 X0 Y0 Z0 S1 ; Set axis minima
    M208 X200 Y200 Z180 S58 ; Set axis maxima

    ; Endstops
    M574 X1 Y1 E0 S0 ; Define active low and unused microswitches
    M558 P4 X0 Y0 Z1 H2 F120 T8000
    G31 P1000 01 Y0 Z1.60 ; Set Z probe trigger value, offset and trigger height
    M557 X0:160 Y25:180 S20 ; Define mesh grid

    ; Drives
    M569 P0 S0 ; Drive 0 goes backwards
    M569 P1 S1 ; Drive 1 goes forwards
    M569 P2 S0 ; Drive 2 goes backwards
    M569 P3 S0 ; Drive 3 goes backwards
    M350 X16 Y16 Z16 E16 I1 ; Configure microstepping with interpolation
    M92 X79.92 Y80.31 E100.96 Z2560 ; Set steps per mm
    M566 X780 Y780 Z18 E300 ; Set maximum instantaneous speed changes (mm/min)
    M203 X24000 Y24000 Z120 E5400 ; Set maximum speeds (mm/min)
    M201 X1400 Y1400 Z100 E80000 ; Set accelerations (mm/s^2)
    M906 X770 Y770 Z770 E900 I30 ; Set motor currents (mA) and motor idle factor in per cent
    M84 S30 ; Set idle timeout

    ; Heaters
    M143 S260 ; Set maximum heater temperature to 260C
    M301 H0 S1.00 P10 I0.1 D200 T0.4 W180 B30 ; Use PID on bed heater (may require further tuning)
    M305 P0 T100000 B4138 C0 R4700 ; Set thermistor + ADC parameters for heater 0
    M305 P1 T100000 B4388 C7.060000e-8 R4700 ; Set thermistor + ADC parameters for heater 1

    ; 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 PGewera ; Set machine name
    M552 P0.0.0.0 S1 ; Enable network and acquire dynamic address via DHCP

    ; 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

    ; Custom settings are not configured

  • What slicer are you using? Is it configured for absolute or relative E steps? If absolute, you have to add the M82 in the startup g-code to switch RRF to absolute extrusion. Just a problem I ran into with Cura (which doesn't seem to support relative extrusion).

  • I got similar results (on a non-Duet printer) when the extruder had to apply excessive force to pull the filament from the spool - did you check that your filament path is not the issue?

  • administrators

    Can you post some higher-resolution pics on a file sharing site?

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