All Metal Cobra Extruder



  • Just finished installing new extruder and all i get is a loud squeal and no movement. Need help not sure what is up with it.
    The information is as follows:
    Step motor rated current/Phase: 0.67 Amp. Rated voltage/Phases: 6.2 VDC
    1:13 Motor: Nema 11 Planetary Gearbox step Motor

    I have set amps to 536mA and have played with the steps.

    Config set up:
    ; Movement Section

    M569 P0 S0 ; X axis direction
    M569 P1 S0 ; Y axis direction
    M569 P2 S0 ; Z axis direction
    M569 P3 S0 ; Extruder Drive 0
    M569 P4 S0 ; Extruder Drive 1
    M574 X1 Y1 Z0 S0 ; set endstop configuration (X and Y endstop only, at low end, active high)
    M906 X1000 Y1000 Z800 E536 ; Set motor currents (mA)
    M201 X800 Y800 Z15 E500 ; Accelerations (mm/s^2)
    M203 X15000 Y15000 Z500 E3600 ; Maximum speeds (mm/min)
    M566 X600 Y600 Z30 E20 ; Minimum speeds mm/minute
    M208 X304 Y304 Z280 ; set axis maxima (adjust to suit your machine)
    M208 X0 Y0 Z0 S1 ; set axis minimum (adjust to make X=0 the edge of the bed)
    M92 X80.29 Y80.12 Z400 ; Set axis steps/mm
    ;M92 E420:420
    M92 E400 ; Set extruder steps per mm (single nozzle)
    ;M92 E420:420 ; Set extruder steps/mm (dual nozzle)
    M350 X16 Y16 E16 I1 ; Set 16x microstepping with interpolation



  • Your M350 line looks wrong to me your Z is missing also if the extruder motor is really 0.67 amps then you are driving it with 536 mA (think this gets rounded down to 500) I would try E400 but it would help if you posted the Motor type number which should be on it's body.

    Doug



  • Thanks Doug,
    Found the problem, it was my wiring. I changed my Extruder motor cable and it solved that issue. I was trying to use a cat 5 cable to run the extruder, hot end and temp. The nema 11 did not like the cable. I will add the Z to my M350. Motor is 28PA13G/28BYG45-067-4A


  • administrators

    Cat 5 cable should have been ok. I suspect you did not have the phases paired.



  • Hi Ron,

    I'm also using Cobra metal extruder.

    Try these settings:
    M906 X1000 Y1000 Z800 E1000 ; Set motor currents (mA)
    M201 X800 Y800 Z15 E300 ; Accelerations (mm/s^2)
    M203 X15000 Y15000 Z500 E2400 ; Maximum speeds (mm/min)
    M566 X600 Y600 Z30 E120 ; Minimum speeds mm/minute



  • @Guyaros:

    Hi Ron,

    I'm also using Cobra metal extruder.

    Try these settings:
    M906 X1000 Y1000 Z800 E1000 ; Set motor currents (mA)
    M201 X800 Y800 Z15 E300 ; Accelerations (mm/s^2)
    M203 X15000 Y15000 Z500 E2400 ; Maximum speeds (mm/min)
    M566 X600 Y600 Z30 E120 ; Minimum speeds mm/minute

    Thanks for the setting, my problem was wiring, most steppers I use it is a simple wire to wire ,however this stepper required a specific order. Once I figured it out it worked fine.
    For us newbies it is nice to be able to find help


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