Fast Extruder

  • Installed Duet WiFi firmware version 2.0. After much trial and error, I have got everything working except printing. The problem one that has been reporter before; i.e., extruder to fast but extrusion amount OK (100 mm equals 100 mm extruded). Using Ideamaker which uses M82, so changed Config.g M83 to M82. Extrusion seemed faster the when config.g M83. Also changed both config.g and code file to M83. Again seemed even faster. Copy of config.g file:
    ; Configuration file for Duet WiFi (firmware version 1.21)
    ; executed by the firmware on start-up
    ; generated by RepRapFirmware Configuration Tool on Thu Sep 27 2018 15:43:23 GMT-0700 (PDT)

    ; General preferences
    G90 ; Send absolute coordinates...
    M82 ; ...but relative extruder moves
    M667 S1 ; switch to CoreXY mode
    ; Network
    M550 PX5S ; Set machine name
    M552 S1 ; Enable network
    ;*** Access point is configured manually via M587
    M586 P0 S1 ; Enable HTTP
    M586 P1 S0 ; Disable FTP
    M586 P2 S0 ; Disable Telnet

    ; Drives
    M569 P0 S1 ; Drive 0 goes forwards
    M569 P1 S1 ; Drive 1 goes forwards
    M569 P2 S0 ; Drive 2 goes forwards S0 Drive 2 goes backwards
    M569 P3 S1 ; Drive 3 goes forwards
    M350 X32 Y32 Z32 E32 I0 ; Configure microstepping without interpolation
    M92 X160 Y160 Z800 E837 ; Set steps per mm
    M566 X900 Y900 Z12 E120 ; Set maximum instantaneous speed changes (mm/min)
    M203 X19800 Y19800 Z4800 E1200 ; Set maximum speeds (mm/min)
    M201 X3000 Y3000 Z300 E500 ; Set accelerations (mm/s^2)
    M906 X1000 Y1000 Z1000 E1200 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 X330 Y330 Z400 S0 ; Set axis maxima

    ; Endstops
    M574 X1 Y1 Z0 S0 ; Set active high endstops X and Y Low limit, Z none and X and Y are normally open

    ; Z-Probe
    M574 Z1 S2
    M558 P5 I1 R0.4 F300 X0 Y0 Z1 ; Set endstops controlled by probe
    ;M558 P2 H5 F120 T6000
    G31 X0 Y0 Z-0.1 P600 ; Set Z probe type to modulated and the dive height + speeds
    ;G31 P500 X165 Y165 Z2.5 ; Set Z probe trigger value, offset and trigger height
    M557 X30:300 Y330:0 S65 ; Define mesh grid

    ; Heaters
    M305 P0 T100000 B4138 C0 R4700 ; Set thermistor + ADC parameters for heater 0
    M143 H0 S120 ; Set temperature limit for heater 0 to 120C
    M305 P1 T100000 B4138 C7.060000e-8 R4700 ; Set thermistor + ADC parameters for heater 1
    M143 H1 S280 ; Set temperature limit for heater 1 to 280C

    ; 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 H1 T45 ; Set fan 2 value, PWM signal inversion and frequency. Thermostatic control is turned on

    ; 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

    ; Automatic power saving
    M911 S10 R11 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000" ; Set voltage thresholds and actions to run on power loss

    ; Custom settings are not configured

    Any Ideas?
    Thanks, Bill

  • Moderator

    When you calibrate your e steps, are you measuring 100mm of filament before the extruder? Or are you measuring 100mm after it's left the nozzle?

  • It seems to have straighten itself out. I hate it when it does that for no known reason, but I glad it did it. Use it all day with no problems. Keeping fingers cross.

  • Thank you.
    Before. Calculating the length of 0.4 mm of extrusion from 1.75 mm diameter and 100 mm in length ((1.75/2)^2/(.4/2)^2x100) or roughly 1914 mm or about 2 yds, but measuring would be. I just assumed if no leaks 100 mm displacement before the extruder would be 100 mm after and 100 mm at the nozzle.
    Somehow it straighten it self out(I hate mysteries).
    Again thank you and I am starting to enjoy the Duet WiFi.

  • Moderator

    Here's an easier way to calibrate the e steps.

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