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    Binder Jetting Printer

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    • 3dprinter
      3dprinter last edited by

      Hi guys,

      I'm currently having a binder jetting machine running on an Arduino with RAMPS 1.4. Due to slow speed and general complexity this isn't really optimal, so I am looking for ways to upgrade.

      Duet3D was one option to go since it has many integrated good motors drivers, 32bit architecture, etc., but if I understand correctly was mainly designed for FDM printers.

      Thus what I'm asking is the following. Can I use the excess amounts of pins e.g. the extension pins to control w/e I want to or are there limitations that I'd need to know about before investing in a Duet2?

      Best regards

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      • Danal
        Danal last edited by

        Duet 2 or Duet 3 core capability is 3D Printing; however, many, many, people are using them in CNC, and quite a few of the "large exotic" things out there in the world, such as concrete printers that scale to print buildings, those have a Duet at their heart.

        Duet hardware has (slightly varying on V2 or V3) number of extra IO pins. They are controllable by G-Code. On/Off/PWM, servo-style PWM, and more. Lots of flex here.

        So... details are needed... at the same time, it is likely a very good choice.

        Delta / Kossel printer fanatic

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        • 3dprinter
          3dprinter last edited by

          Thank you so much for your answer.

          It's a powder bed machine with a recoatinger and a printhead. Overall it has 5 motors and one and perspectively two heating units.

          The printhead controlboard currently needs 8 Arduino pins.

          Best regards

          dc42 1 Reply Last reply Reply Quote 0
          • Danal
            Danal last edited by Danal

            5 motors is within the based capacity of a Duet V2 or 3 (no expansions needed).

            Duet3 has 9 general purpose (3.3v logic) IO. Duet 3 also has 1 very high current output for a bed heater, 3 medium current for heaters, and 6 low current for fans, all at various voltages. These can be easily repurposed into logic outputs. Duet 3 does not, at this time, have a lot of support for step/direction pins for external drives. There is stated future direction (no dates yet) to have expansion boards that directly provide this.

            Duet 2 does have a lot of pins for step/dir style external drivers, and a fair amount of general IO.

            Unless there is something very specific driving to Duet V2, I'd pick a V3 board for your application, and configure from there.

            Delta / Kossel printer fanatic

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            • NitroFreak
              NitroFreak last edited by

              the more interesting question would be what would the software for the jetting look like?
              What kind of jets are you using? And what resolution?
              Is it a full width jet or a repositioning system like a stratasys objet?

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              • dc42
                dc42 administrators @3dprinter last edited by dc42

                @3dprinter said in Binder Jetting Printer:

                Thank you so much for your answer.

                It's a powder bed machine with a recoatinger and a printhead. Overall it has 5 motors and one and perspectively two heating units.

                The printhead controlboard currently needs 8 Arduino pins.

                A Duet WiFi or Duet Ethernet provides 5 drivers, one high current PWM output (intended for bed heater), 2 medium current PWM outputs (intended for extruder heaters) and 3 low current PWM outputs (intended for fans). So it satisfies your basic requirements. The expansion connectors have about 14 more outputs, of which 5 are PWM capable. So more than the 8 that you need. The signal level on these pins is 3.3V.

                Duet 3 also meets your requirements, but is more expensive. Its main benefits are higher current motor drivers, dedicate SPI bus to connect a Raspberry Pi, and expandability via CAN bus.

                HTH David

                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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