E3D v6 Extruder issues



  • Trying to calibrate my extruder. its linked to a 1.8 deg motor and when using a standard board worked fine, but have just upgarded to a DuetWifi and trying to get all working for first print. have set up for a 1/16 interpolated microsteps and using the same steps per mm as used on the old board 860 stpes per mm but the extruder is totally inconsistent when trying to extrude, sometimes runs, othertimes just grinds filament, would really need some help here from others with same set up.


  • administrators

    860 steps/mm is very high if you are using a 1.8deg motor and x16 microstepping. What type of extruder is it?



  • yes, my fault its a E3D Titan, should have been 430. I had put it to 860 as had moved to 32 x on my previous board. Sorry!



  • Still having issues though, the filament speed through the extruder seems inconsistent, when I put a marker on the filement and watch it, it doesn't seem a smooth and speed but fluctuates. I'm only trying 100mm at a 5mm/s feed rate through the console.

    ; Drives
    M569 P0 S1 ; Drive 0 goes forwards
    M569 P1 S1 ; Drive 1 goes forwards
    M569 P2 S1 ; Drive 2 goes forwards
    M569 P3 S1 ; Drive 3 goes forwards
    M350 X16 Y16 Z16 I1 ; Configure microstepping without interpolation
    M350 E16 I1 ; Configure microstepping without interpolation
    M92 X100 Y100 Z400 E430 ; Set steps per mm
    M566 X900 Y900 Z24 E300 ; Set maximum instantaneous speed changes (mm/min)
    M203 X12000 Y12000 Z300 E1200 ; Set maximum speeds (mm/min)
    M201 X5000 Y5000 Z100 E1000 ; Set accelerations (mm/s^2)
    M906 X1500 Y1500 Z1200 E1500 I30 ; Set motor currents (mA) and motor idle factor in per cent
    M84 S30 ; Set idle timeout


  • administrators

    Can you see the extruder gear skipping steps?

    How old is your Titan? Some of the early ones had faulty hobbed shafts, which gave this sort of problem. E3D provided replacement parts to those affected.



  • No, the gear seems to be moving smoothly, and it only about 3 months old. Also it was running absolutely fine on the original board at both 16x and 32x on marlin firmware.

    I'm not with the printer at the moment but will double check this evening. But the best way of describing is:

    Extrude 5mm at 200c 5mm/s federate all ok.
    Extrude 50mm or more and the first part seems to run fine, then the filament seems to hesitate in its rate.

    If you have any other ideas I can test later.


  • administrators

    If the gear is moving smoothly when you extrude the 50mm, then it can only mean that the hobbed shaft is not gripping the filament well enough. It could be that the hobbed shaft has become clogged up with ground filament. Or perhaps the temperature calibration is not quite the same as it was with your previous hardware and firmware, and you are extruding at a slightly lower temperature.



  • I notice you have the Extruder current set in the M906 line at E1500 (mA)this seems high to me?
    What does anyone else think?


 

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