Multi color printing with Prusa's MMU V2 & Duet?



  • Purge blocks and the like are generated by the slicer or post processing scripts



  • Ah. Thanks.
    Would be great for TPU printing as supports with TPU are useless- just use pla.



  • @gavatron3000 said in Multi color printing with Prusa's MMU V2 & Duet?:

    https://docs.google.com/document/d/13r_6BTYTO-xlD6cQeNwOx4qeCEYYGrxOcHc0mC-tT8Q/edit?usp=drivesdk

    Hmm...

    I didn´t understand as I have to.
    Can somebody tell me where I have to plug in the Pinda probe. For now I putted him to E0 Endstop, but I can´t home the selector (drive U).

    In the description I have to plug him to V but

    Here some details of config.g

    ; Endstops
    M574 X1 Y1 S1 ; Set active high endstops
    M574 U1 V1 W1 S3 ; Set additional axes as sensorless endstops
    M574 Z1 S2 ; Set endstops controlled by probe

    ;Drives
    M569 P4 S0 ; Drive 4 goes backwards V
    M569 P5 S1 ; Drive 5 goes forwards U
    M569 P6 S0 ; Drive 6 goes backwards W
    M584 X0 Y1 Z2 E3 V4 U7 W6 ; Apply custom drive mapping



  • @computiger said in Multi color printing with Prusa's MMU V2 & Duet?:

    @gavatron3000 said in Multi color printing with Prusa's MMU V2 & Duet?:

    https://docs.google.com/document/d/13r_6BTYTO-xlD6cQeNwOx4qeCEYYGrxOcHc0mC-tT8Q/edit?usp=drivesdk

    Hmm...

    I didn´t understand as I have to.
    Can somebody tell me where I have to plug in the Pinda probe. For now I putted him to E0 Endstop, but I can´t home the selector (drive U).

    In the description I have to plug him to V but

    Here some details of config.g

    ; Endstops
    M574 X1 Y1 S1 ; Set active high endstops
    M574 U1 V1 W1 S3 ; Set additional axes as sensorless endstops
    M574 Z1 S2 ; Set endstops controlled by probe

    ;Drives
    M569 P4 S0 ; Drive 4 goes backwards V
    M569 P5 S1 ; Drive 5 goes forwards U
    M569 P6 S0 ; Drive 6 goes backwards W
    M584 X0 Y1 Z2 E3 V4 U7 W6 ; Apply custom drive mapping

    the pinda is used as the V axis endstop in certain situations during loading so it must be plugged into that axis endstop input. U axis uses sensorless homing



  • @gavatron3000 said in Multi color printing with Prusa's MMU V2 & Duet?:

    I don't use the cutter, for me I didn't think it's necessary as the ramming before retraction forms the tip anyways. Abs just works but pla is more difficult. Make sure you use the correct I.D PTFE tube in the Hotend as well. 1.8mm to 1.85mm. capricorn tubing isnt narrow enough either, ive tried.

    I almost forgot! I'm adding some modded STL and scad files soon so the filament change will function perfectly as the filament ejection will snag on T4 without a small mod to the selector and main body of the mmu2

    Hey there,
    first of all, awesome work!
    Second, where are the stl's you mentioned here? Are they important?
    Thanks in advance!



  • the stl's arent a requirement, but they only help in the situation when T4 is out of filament and the 50cm or so of left over filament is ejected out the front of the machine if you know what i mean. with the standard selector it will foul in this situation. i havent finished this yet as a filament runout on T4 is very low percentage of my issues but i will do this eventually



  • @gavatron3000 thanks a lot for all the prep work! Working on my unit right now but my steppers get way too hot 😞
    Are you using original parts from prusa? Are there any changes to your macros?



  • I think I got everything finally setup correctly. I am a bit confused on setting up prusa slic3r to tell it to use the macros.



  • Tell the slicer that you have multiple extruders. The slicer imbeds tool change commands. The firmware moves the filaments around in the MMU when it sees a "tool change".

    I think. I have actual multi-tool printers and that's the way it works for them. Slicer asks for a different tool, and all the moves to make that happen are in the free/pre/post macros in Duet.



  • I have slicer setup as 5 extruders and the mixing option is checked. When I go to marcros and click them individually they run like they are supposed to.


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