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    Flying extruder with 4th axis

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    • anderundefined
      ander
      last edited by

      Hi there
      Thanks for the help, i saw i had some errors so i changed them and the new axis seems to work fine even with lateral compensations, But i still have to fix one last thing so the printer can start printing, and this is the Z probe situation. I feel a bit confused with this thing in the firmware 3.0.
      Being a delta printer has 3 axis ( X,Y,Z) and then it has an effector with a mecanical switch on it similar to the atom delta 3d printer.
      The new axis(U) endstop is conected to E0 endstop pin, and the effector´s Z probe is conected to E1 endstop pin.
      Here i put my config file and bed file.config(2).g bed.g

      After finishing the entire configuration i will post the finished config file so others can use it
      thanks

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      • dc42undefined
        dc42 administrators
        last edited by

        As you are running RRF3 I suggest you change your M558 command to this:

        M558 P5 C"e1stop" H5 F1200 T6000 ; set Z probe type to effector and the dive height + speeds

        Use either P5 (filtered) or P8 (unfiltered). The command as shown is for a normally-close switch. If your switch is normally open (not recommended) then use C"!e1stop" instead.

        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

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        • anderundefined
          ander
          last edited by

          Hi there
          thanks for all the help, the printer looks that works fine, now time to create some macro´s etc.
          For those who want to replicate this setup i will leave here my config file so you can copy.
          It is currently running on a duet wifi and firmware 3.0
          config (2).g

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          • anderundefined
            ander
            last edited by ander

            Hello everyone
            The 4th axis delta is running but i noticed an issue and i don´t know how to solve it.
            To put everyone in context, we are running a delta printer on a duet wifi using firmware 3.0. the printer has an aditional axis for the flying extruder (see picture).
            The issue is that the non printing moving speed is very low, i can increase the speed in simplify 3d up to 400mm/s (currently set at 200mm/s), and you notice no difference.
            Even homing speed is very slow, and i noticed that if i push the endstop of the aditional tower by hand when homing, the rest of the motors speed up inmediately, so i looks like it is related to the aditional axis.
            i will put the config file and homing file so you can please give me a hand.
            Thanks1583396013208-whatsapp-image-2020-03-05-at-08.51.18.jpeg config (3).ghomedelta.g

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            • dc42undefined
              dc42 administrators
              last edited by

              I don't see your config.g file.

              I suggest you change your homedelta.g file as follows:

              ; homedelta.g
              ; called to home all towers on a delta printer
              ;
              ; generated by RepRapFirmware Configuration Tool v2.1.8 on Thu Feb 27 2020 08:16:33 GMT+0100 (hora estándar de Europa central)
              G91   ; relative positioning
              M584 P4                     
              G1 H1 X833 Y833 Z833 U833 F5000 ; move all towers to the high end stopping at the endstops (first pass)
              G1 H2 X-5 Y-5 Z-5 U-5 F4800    ; go down a few mm
              G1 H1 X10 Y10 Z10 U10 F360     ; move all towers up once more (second pass)
              M584 P3
              G1 Z-5 F600               ; move down a few mm so that the nozzle can be centred
              G90                        ; absolute positioning
              G1 X0 Y0 F6000             ; move X+Y to the centre
              

              Added M584 P3 line, and removed the U parameter from the following G1 command.

              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

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              • anderundefined
                ander
                last edited by

                I don´t know why but the config file was on the right of the picture i sent.
                i just removed the U parameters in the home section, and the u axis doesn´t go back home anymore
                config (3).g

                dc42undefined 1 Reply Last reply Reply Quote 0
                • dc42undefined
                  dc42 administrators @ander
                  last edited by

                  @ander said in Flying extruder with 4th axis:

                  i just removed the U parameters in the home section, and the u axis doesn´t go back home anymore

                  That isn't what I suggested. Read my reply again.

                  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

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                  • anderundefined
                    ander
                    last edited by

                    Sorry i missunderstood. i made the change you suggested and still makes non printing moves very slow

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                    • dc42undefined
                      dc42 administrators
                      last edited by

                      We do not advise running at x256 microstepping. Change to x16 with interpolation, adjust the M92 steps/mm accordingly, and try again.

                      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

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                      • anderundefined
                        ander
                        last edited by

                        It worked very well!
                        Thanks for the excelent service!!

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