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can one printer print two different models???

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  • undefined
    georgepaul
    last edited by 1 Sept 2019, 13:47

    I was wondering if I could use the IDEX set up to print two different models simultaneously on two corners of the bed.

    This would mean defining another extruder motor with a different step per mm and other extruder parameters. Both extruders move simultaneously but at different rates and different steps(one may move 5mm while other moves 50mm).
    And also making sure both the extruders are done with their first layer and only then do a layer change.

    undefined undefined 3 Replies Last reply 1 Sept 2019, 15:01 Reply Quote 0
    • undefined
      T3P3Tony administrators @georgepaul
      last edited by 1 Sept 2019, 15:01

      @georgepaul issue with IDEX is the models would need to be the same in Y. to do that you need IDEXY - fun mechanical challenge.

      www.duet3d.com

      undefined undefined undefined 3 Replies Last reply 2 Sept 2019, 16:00 Reply Quote 0
      • undefined
        JoergS5 @georgepaul
        last edited by 1 Sept 2019, 15:03

        @georgepaul I would say it can't, because the Y axis is shared. To print two models then means printing at different times, which is the same as printing them one after the other (you need no idex then).
        There was a discussion somewhere to print having a printer with two independent x-y-extruder by a construction in different levels. The only problem is, they cannot cross their lines because of the height of the heater.

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        • undefined
          JoergS5 @georgepaul
          last edited by JoergS5 9 Jan 2019, 15:29 1 Sept 2019, 15:09

          @georgepaul I found the discussion: https://reprap.org/forum/read.php?397,714601
          (not exactly the discussion which i meant, maybe I'll find it)

          A nice overview: https://www.fabbaloo.com/blog/2018/3/16/the-several-methods-of-dual-extrusion

          I found an article from 2014 (!) with an interesting printer: https://3dprint.com/13310/theta-3d-printer/

          undefined 1 Reply Last reply 3 Sept 2019, 05:23 Reply Quote 0
          • undefined
            denke @T3P3Tony
            last edited by 2 Sept 2019, 16:00

            @t3p3tony

            The ideXY approach also has it's limitations if the print time is not equal in both models for any given layer:
            One head would have to idle until the other finishes resulting in oozing therefore unkonwn amount of filament remaining in the head at the end of the idling (start of new layer) resulting in bobs and / or gaps.
            Or another approach is to re-prime the head after each layer which is just a waste of filament

            undefined 1 Reply Last reply 3 Sept 2019, 05:26 Reply Quote 0
            • undefined
              georgepaul @JoergS5
              last edited by 3 Sept 2019, 05:23

              Thank you @joergs5.. will look into it and keep you posted👍

              1 Reply Last reply Reply Quote 0
              • undefined
                georgepaul @T3P3Tony
                last edited by 3 Sept 2019, 05:25

                @t3p3tony sure is going to be fun☺ 👌

                1 Reply Last reply Reply Quote 0
                • undefined
                  georgepaul @denke
                  last edited by 3 Sept 2019, 05:26

                  @denke wow.. i Dint think of the Oozing.. something more to worry about now😁

                  1 Reply Last reply Reply Quote 0
                  • undefined
                    georgepaul
                    last edited by 3 Sept 2019, 05:28

                    But is it possible to run two or more extruders... more like mixing extruders but independent, without the ratio thingy???

                    undefined 1 Reply Last reply 3 Sept 2019, 10:42 Reply Quote 0
                    • undefined
                      T3P3Tony administrators @georgepaul
                      last edited by 3 Sept 2019, 10:42

                      @georgepaul yes you can send gcode like:

                      G1 X1 Y2 U1 V2 E100:75

                      this implies you have 4 axis XY and UV so different gantres, with two extruders and are driving E0 with 100 steps and E1 with 75 steps

                      www.duet3d.com

                      undefined 1 Reply Last reply 4 Sept 2019, 07:38 Reply Quote 0
                      • undefined
                        georgepaul @T3P3Tony
                        last edited by 4 Sept 2019, 07:38

                        Wow @t3p3tony... this was really useful. I made the following changes in the config and it worked... Duet surprises me every day... It has solved my problem for now👍 👌

                        M92 X640.00 Y640.00 Z3200.00 E200:200:200:200:200 ; Set steps per mm

                        ; Tools
                        M563 P0 D0:1:2:3:4 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

                        1 Reply Last reply Reply Quote 1
                        • undefined
                          georgepaul
                          last edited by 4 Sept 2019, 07:41

                          The Gcode that I tried is;
                          G1 E10:100 :200:300:400
                          and the motors (E0, E1, E2, E3, E4)danced along.
                          I tried 5 extruder motors just out of curiosity☺

                          1 Reply Last reply Reply Quote 1
                          • undefined
                            CJ.BRAVO @T3P3Tony
                            last edited by CJ.BRAVO 6 Jun 2020, 08:40 6 Jun 2020, 08:20

                            @T3P3Tony

                            IDXY - how would one write the print file for that?

                            undefined 1 Reply Last reply 6 Jun 2020, 22:08 Reply Quote 0
                            • undefined
                              Gerrard @CJ.BRAVO
                              last edited by 6 Jun 2020, 22:08

                              @CJ-BRAVO I'm not an expert here, I'm not sure any such slicer exists, but I could imagine a work around with using python or similar to merge two separately sliced gcode files...

                              1 Reply Last reply Reply Quote 0
                              • undefined
                                CJ.BRAVO
                                last edited by 7 Jun 2020, 09:08

                                yeah but lets say you spliced the gcode, you would still have 2 separate tools with a tool change? no?

                                any gcode magic to work 2 tools at the same time?

                                1 Reply Last reply Reply Quote 0
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