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RepRapFirmware Polar 3D support

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  • undefined
    dc42 administrators
    last edited by 12 Oct 2017, 14:19

    It's possible, but it may be a little while before I have time to do it. Please supply some details:

    • Is the X=0 Y=0 point at the centre of the turntable, or somewhere else?

    • Does the print head move linearly along the diameter of the turntable, or does it pivot about the Z axis and move in an arc across the turntable?

    • What is the expected behaviour if you print a line running through the centre of the turntable?

    • How do you home it?

    • Please provide photos of the printer.

    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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    • undefined
      frafa
      last edited by 10 Dec 2017, 15:33 12 Oct 2017, 15:33

      Cool 🙂
      we have time on this project, nothing urgent

      the member of the association is prosthetist
      it works on a polar printer to print circular shapes quickly

      its current prototype:
      round tray without end-stop
      x is linear
      x = 0 end of travel at the center of the plate

      I contact him to tell him to come on the forum
      photos to come

      because it is I who rule Marlin is it is far too old …
      I contact him to tell him to come on the forum

      Scara with DuetWifi => Scarlette3D
      https://youtu.be/mBF5cO8vGhI

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      • undefined
        pir2z
        last edited by 13 Oct 2017, 18:00

        Hello David
        I'm Pierre, Montpellier Fablab member. I contact you following the previous talk with François.
        I ordered today a duetwifi on your website.
        As François said I develop a 3d printer based on the project R-360 and I'm now on hardware programmation.
        My 3d printer is, I think, very simple.
        Z = Z
        turntable is based on :
        x= R cos Theta
        y = R sin Theta

        I have only 2 endstops z0 and r0. When z=0 and r=0 : Theta =0
        Rmax = 150 mm
        Zmax = 1000mm (not a joke… I will send you later a picture of the printer)

        The print head is on R and slides horinzontaly.
        The bed is heaten during the printing and turnes in the same time. In my mind it turns mainly in clockwise.

        The target is to print prosthetic sockets and covers
        You will see typical results on this website : https://www.createoandp.com/
        My project is not new, you can get a look on this link http://prostheticdesign.com/index.php?route=product/category&path=75
        I wish to do something similar but vertical and more "3D printer look like"

        If you think you can help me on this project it will be very kind of you.

        Thank for your help

        Best regards

        Pierre Zanetti

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        • undefined
          dc42 administrators
          last edited by 13 Oct 2017, 19:36

          Hi Pierre,

          Thanks for the information.

          As I understand it, you don't have a homing switch for the turntable, you just use the position it is in at power up as the reference. This would prevent the use of power down and resume functionality; but depending on other details of the printer, that might not be possible anyway, because you may be unable to home Z with a print on the bed.

          With your current electronics, do you use the X motor output to control the radius motor and the Y motor output to control the turntable motor, or the other way round?

          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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          • undefined
            pir2z
            last edited by 14 Oct 2017, 10:41

            Hi David
            Thanks for your quick answer. I see you have well understood my project.
            About steeper
            Xsteeper = R
            Ysteeper = Turntable (Theta)

            I would like to send pictures but I have some difficulties to join something with this forum.
            Please send me an email to zanetti_pierre@hotmail.fr and I will forward some schemas and pictures.

            Best regards

            Pierre Zanetti

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            • undefined
              frafa
              last edited by 14 Oct 2017, 11:06

              if need be we will add a hall effect end-stop on Turntable (Theta) …

              Scara with DuetWifi => Scarlette3D
              https://youtu.be/mBF5cO8vGhI

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              • undefined
                dc42 administrators
                last edited by 14 Oct 2017, 11:51

                Thanks. Initial support for Polar printers will be in the next 1.20beta. See https://duet3d.com/wiki/Configuring_RepRapFirmware_for_a_Polar_printer for the initial documentation.

                To include images in posts, store them on a file sharing site and put the link between img tags in your post. If you use Dropbox to host your images, replace ?dl=0 at the end of the link by ?raw=1.

                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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                • undefined
                  pir2z
                  last edited by 17 Oct 2017, 10:53

                  Hi David
                  Thank for your support. I'm waiting for the duet and asap I will plug in on my 3d printer I will do some tests.

                  For pictures I will do that this evening if I all is ok.

                  Best regards

                  Pierre

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                  • undefined
                    pir2z
                    last edited by 15 Aug 2018, 15:04

                    Dear David,
                    Long time I didn't give you any news.
                    The duet is not set on my Polar 3D printer.
                    I connected all and I did first test, the manual control works more or less ok but nothing go to print.
                    I would like to know what's wrong with my programation.
                    What do you need to see where is the trouble ?

                    Thank for all

                    Best regards

                    Pierre Zanetti

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                    • undefined
                      dc42 administrators
                      last edited by 15 Aug 2018, 16:48

                      Are you able to home the printer?

                      What happens when you try to print something?

                      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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                      • undefined
                        pir2z
                        last edited by 15 Aug 2018, 20:43

                        Hi thank to take time for me.
                        Last version seemed worked but during the priting the 3D printer during long minutes untill to start again.
                        We tryed with François to understand what wrong without success. Now I installed my printer at home and I intented an upload with last information on forum, actually the printer made the homing and nothing else. I don't understand what's wrong with it.

                        Thank for your help

                        Best regards

                        Pierre Zanetti

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                        • undefined
                          dc42 administrators
                          last edited by 16 Aug 2018, 10:52

                          I'll need more detail than that.

                          I suggest you start by testing the motors individual by sending G91 to select relative mode followed by G1 S2 X... and G1 S2 Y... commands. Use these moves to check that the steps/mm and steps/degree are correct.

                          When you are satisfied with that, send G90 to switch back to absolute coordinates, and test homing.

                          If homing is working, test straight line G1 XY moves at low speeds. Check that the moves look as though they are straight relative to a fixed point on the bed.

                          If that looks OK, try a very simple test print such as a cube, printed at low speed so that you can better see what is happening if something goes wrong.

                          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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