Simultaneous 4 Extruder Printing: Set "Extruder Drive: All" in gcode?



  • In DWC under Extruder Control > Extruder Drive, what gcode is sent when I press "All"? If I do that, all my extruders run:

    But if I try printing something, although all the heaters come on and all the extruder fans work, only the E0 extruder motor runs.

    It seems to me that whatever DWC sends when I click "Extruder Drive: All" is the line I need to add to my starting script. But what is it? Selecting the tool doesn't do it (T1 in this case).

    Related comment: I can't coax the gcode console to display any commands it sends itself. I I could just see what that button does I think the problem will be solved.

    This is how that toolhead is configured:

    [[language]]
    ; ###Define Tool 1 (Quad-Extruder)###
    M563 P1 D0:1:2:3 H1:2:3:4 F0:3:5:7; Define tool 1 (P1) to use drives 2, 7, 8, and 9, and heaters 1,2 ,3, and 4.
    G10 P1 S0 R0 X0 Y0    ; set tool 1 temperatures and offsets
    
    ; ###Configure extruder fans for thermostatic control###
    M106 P1 S255 I0 F500 H1 T45		;Fan 1 (P1) is for extruder 0... PWM signal inversionoff (I0), frequency 500Hz (F500). Thermostatic control on and referenced to H1 (E0's heater) and set to come on at 45*C (T45).
    M106 P4 S255 I0 F500 H2 T45		;Fan 4 (P4) is for extruder 1
    M106 P6 S255 I0 F500 H3 T45		;Fan 6 (P6) is for extruder 2
    M106 P8 S255 I0 F500 H4 T45		;Fan 8 (P8) is for extruder 3
    
    

    ~Justine


  • administrators

    Use M567 to set a tool mix ratio of 1:1:1:1.



  • It's alive! Thank you.



  • Nice printer!



  • needs a time lapse video so we can see it print 😄


  • administrators

    That is an amazing looking printer… Can we see more please!



  • Wearing my engineer's hat, that is a very impressive printer. For it to work, the bed has to be perfectly flat, the X and Y axis perfectly tram and all 4 nozzles perfectly aligned in Z. All of those parameters within less than 0.1mm over what looks like quite a large build area. So huge Kudos Justine - very well done indeed. More pics and maybe a video would be great.

    Ian


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