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    Independent steps per mm on E axis

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    • Spodeopieterundefined
      Spodeopieter
      last edited by

      I want to drive one extruder axis from the integrated E0 and E1 drivers , but with different steps per mm for the two drivers, because I have different motors driving the same axis , inline extruders on the same piece of filament.

      configuration with M92 and M584 does not seem to be able to do this.

      How can I make this work, do you have any ideas/suggestions ?

      Can I bind one axis to another axis so they move the same amount of units ?

      deckingmanundefined 1 Reply Last reply Reply Quote 0
      • briskspiritundefined
        briskspirit
        last edited by

        M92 E97:97 ; Set steps per mm for extruders E0 and E1

        1 Reply Last reply Reply Quote 1
        • deckingmanundefined
          deckingman @Spodeopieter
          last edited by

          @spodeopieter As @briskspirit said.

          A real life example would be my own config which uses 5 extruders mapped to drive 5 to 9. Each extruder has been calibrated and has a slightly different value for the steps per mm. So I have:

          M584 X0:3 Y1:4 Z2 U10 V11 E5:6:7:8:9

          followed by

          M92 X80 Y80 U80 V80 Z3200 E409:403:407:405:403

          Ian
          https://somei3deas.wordpress.com/
          https://www.youtube.com/@deckingman

          briskspiritundefined 1 Reply Last reply Reply Quote 1
          • briskspiritundefined
            briskspirit @deckingman
            last edited by

            @deckingman Ian, may I ask you to help me check my config please? https://forum.duet3d.com/topic/7048/help-to-check-config-please

            1 Reply Last reply Reply Quote 1
            • Spodeopieterundefined
              Spodeopieter
              last edited by

              Yes , but then each would be a independent extruder axis , I need them to function as one , I have the two extruders inline , they both push the same piece of filament (I need to have very high extrusion force) .

              I need Drives 3 and 4 to function together as an E-axis , but with different steps per mm , because I have two different extruders.

              I can probably do it with a g code parser , but this would not be ideal.

              briskspiritundefined 1 Reply Last reply Reply Quote 0
              • briskspiritundefined
                briskspirit @Spodeopieter
                last edited by

                @spodeopieter Make them as the one tool.

                deckingmanundefined 1 Reply Last reply Reply Quote 1
                • deckingmanundefined
                  deckingman @briskspirit
                  last edited by

                  @briskspirit said in Independent steps per mm on E axis:

                  @spodeopieter Make them as the one tool.

                  Exactly so.

                  Taking my real life example again, I use a mixing hot end which has 5 extruders feeding in to one nozzle. So I have for example
                  M563 P0 D0:1:2:3:4 H1

                  In your case it would simply be M563 P0 D0:1

                  Ian
                  https://somei3deas.wordpress.com/
                  https://www.youtube.com/@deckingman

                  dc42undefined 1 Reply Last reply Reply Quote 1
                  • dc42undefined
                    dc42 administrators @deckingman
                    last edited by

                    @deckingman said in Independent steps per mm on E axis:

                    @briskspirit said in Independent steps per mm on E axis:

                    @spodeopieter Make them as the one tool.

                    Exactly so.

                    Taking my real life example again, I use a mixing hot end which has 5 extruders feeding in to one nozzle. So I have for example
                    M563 P0 D0:1:2:3:4 H1

                    In your case it would simply be M563 P0 D0:1

                    And then M567 E1:1 to set them to extrude equal amounts.

                    Duet WiFi hardware designer and firmware engineer
                    Please do not ask me for Duet support via PM or email, use the forum
                    http://www.escher3d.com, https://miscsolutions.wordpress.com

                    deckingmanundefined 1 Reply Last reply Reply Quote 1
                    • deckingmanundefined
                      deckingman @dc42
                      last edited by

                      @dc42 said in Independent steps per mm on E axis:

                      @deckingman said in Independent steps per mm on E axis:

                      @briskspirit said in Independent steps per mm on E axis:

                      @spodeopieter Make them as the one tool.

                      Exactly so.

                      Taking my real life example again, I use a mixing hot end which has 5 extruders feeding in to one nozzle. So I have for example
                      M563 P0 D0:1:2:3:4 H1

                      In your case it would simply be M563 P0 D0:1

                      And then M567 E1:1 to set them to extrude equal amounts.

                      Ah yes, forgot to mention the mixing ratio - thanks for putting that right David.

                      Ian
                      https://somei3deas.wordpress.com/
                      https://www.youtube.com/@deckingman

                      1 Reply Last reply Reply Quote 1
                      • Spodeopieterundefined
                        Spodeopieter
                        last edited by

                        @briskspirit @dc42 @deckingman Thanks for helping me out !

                        1 Reply Last reply Reply Quote 0
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