Dual extruder single nozzle config help



  • I dont dare use the configurator for it all and need some advice setting up a second extruder with one nozzle and one heater

    I am still trying badly to print something useful and are now checking all the components to rule those out one after one so I need a second extruder

    Will it look something like this?
    ; 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
    M569 P4 S1 ; Drive 4 goes forwards
    M350 X16 Y16 Z16 E16:16 I1 ; Configure microstepping with interpolation
    M92 X80 Y80 Z3200 E420:420 ; Set steps per mm

    ; Heaters - Do we set a second heater?
    M305 P0 T100000 B4175 C0 R4700 ; Set thermistor + ADC parameters for heater 0
    M143 H0 S120 ; Set temperature limit for heater 0 to 120C
    M305 P1 T100000 B4175 C0 R4700 ; Set thermistor + ADC parameters for heater 1
    M143 H1 S280 ; Set temperature limit for heater 1 to 280C



  • I guess I need some tool and fan lines as well

    How do it look like using same heater and same fan?

    ; 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
    M563 P1 D1 H2 ; Define tool 1
    G10 P1 X0 Y0 Z0 ; Set tool 1 axis offsets
    G10 P1 R0 S0 ; Set initial tool 1 active and standby temperatures to 0C

    ; 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 H2 T45 ; Set fan 2 value, PWM signal inversion and frequency.



  • Will this be right for tools?

    ; Tools
    M563 P0 D0 H1 F1 ; 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
    M563 P1 D1 H1 F1 ; Define tool 1
    G10 P1 X0 Y0 Z0 ; Set tool 1 axis offsets
    G10 P1 R0 S0 ; Set initial tool 1 active and standby temperatures to 0C



  • I think I managed to get it configured. Guess most ppl are doing something besides troubleshooting on a sunday night.. 😉

    I have to test and see if it prints something though


  • administrators

    Is it a switching hot end or a mixing hot end? If it is a switching hot end, then that looks ok to me, although you will also need to set up tool change files to retract filament from the old tool before switching tools, then prime the new tool. If it is a mixing hot end, I suggest you read deckingman's blog entry at https://somei3deas.wordpress.com/2017/01/11/using-the-diamond-hotend-with-duetwifi/.



  • 2 extruders feeding into a single hot end using the same heater and hot end fan yes?

    If so, everything in you first post is fine (providing the motors rotate in the correct direction), and no you don't set up a second hot end heater.

    How many fans have you actually got? By default P0 is the part cooling fan and P1 is the hot end cooling fan. In that case, your tool definitions look right and you could drop the "F" parameter as F1 is the default in any case. If you haven't got another hot end cooling fan, you don't need define it with M106 P2 (you aren't using it in any case).

    Edit - I'm assuming it's a switching hot end as I've never heard of a two input mixing hot end but let me know if it's a mixing hot end and I'll introduce you to the wonderful world of setting up mixing ratios and the like.

    2nd edit - only just read the last 2 posts............



  • @deckingman

    First of all - this is just a test rig now as you might know I have big extrusion issues. So I am setting up a second extruder to try trouble shoot one component at the time as I can NOT find anything more to do with firmware

    So just ONE hotend, NO mixing, blending, switching or anything. Just two extruders going to the same head by a manual hand job.. 😛

    I only have 1 hotend with ONE heatsink fan as is using F1. Fan 0 is later for the layer fan as you say and I think of using F2 for the controller fans


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