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AWD Voron 2.4 - Duet3

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My Duet controlled machine
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  • undefined
    T3P3Tony administrators @michaelr123
    last edited by 12 Jan 2024, 12:05

    @michaelr123 the idea here is to have one motor in each corner of a corexy design?

    www.duet3d.com

    undefined 1 Reply Last reply 12 Jan 2024, 13:48 Reply Quote 0
    • undefined
      michaelr123 @T3P3Tony
      last edited by 12 Jan 2024, 13:48

      @T3P3Tony

      Correct. more power and shorter belt paths help with improving resonance and higher print speeds. It also replaces the printed brackets on the coreXY frame with aluminum parts to improve rigidity.

      undefined 1 Reply Last reply 12 Jan 2024, 14:09 Reply Quote 0
      • undefined
        T3P3Tony administrators @michaelr123
        last edited by 12 Jan 2024, 14:09

        @michaelr123 cool, i wonder what elements of that are most significant, shorter belt paths or the change in power/inertia ratio between 2xnema 14s vs 1xnema17

        www.duet3d.com

        1 Reply Last reply Reply Quote 0
        • undefined
          DocTrucker
          last edited by 12 Jan 2024, 16:11

          The resonance is an interesting one as from a brief look it replaces what would have been idle pulleys with second motors. If so the tendancy for the belt to flap about perpendicular to the intended travel would be largely unchanged. That said the two motors would likely add different vibration along the length of the belt reducing peaks unless they synchronised.

          Running 3 P3Steel with Duet 2. Duet 3 on the shelf looking for a suitable machine. One first generation Duet in a Logo/Turtle style robot!

          undefined 1 Reply Last reply 15 Jan 2024, 21:50 Reply Quote 1
          • undefined
            michaelr123 @DocTrucker
            last edited by 15 Jan 2024, 21:50

            We'll see soon!

            I had the day off and got a lot done on the upgrades. One thing I'm running into is needing a 5v power supply for the 5v fan recommended for breakneck: https://www.digikey.com/en/products/detail/delta-electronics/ASB02505SHA-AY6B/7491489

            What would be the best way to get a 5v output from OUT_2? I see that it can be selected for either V_in or 12v, I was thinking about getting a tiny 12v to 5v buck converter. Anybody have a better idea on how to wire this up? This is what I found: https://www.amazon.com/gp/product/B0B779ZYN1/ref=ox_sc_act_title_1?smid=A3BHBZ2FB4T3LK&psc=1

            I might convert over to AWD today yet, we'll see. I'm importing this fan from the UK, so it'll be a bit before I can get the upgraded toolhead put together and installed anyway.

            undefined 1 Reply Last reply 16 Jan 2024, 06:50 Reply Quote 0
            • undefined
              DocTrucker @michaelr123
              last edited by DocTrucker 16 Jan 2024, 06:50

              @michaelr123 if you decide to use external 5V supplies I found the following DCDC adaptors (3A 5V out) useful. Fairly sure there are options with a screw terminal instead of the USB socket, but easy enough to either remove the socket, or make up a power lead with a type A plug on one end.

              20240111_111333_snk.jpg

              20240111_111550_snk.jpg

              Running 3 P3Steel with Duet 2. Duet 3 on the shelf looking for a suitable machine. One first generation Duet in a Logo/Turtle style robot!

              undefined 1 Reply Last reply 16 Jan 2024, 17:07 Reply Quote 0
              • undefined
                michaelr123 @DocTrucker
                last edited by 16 Jan 2024, 17:07

                @DocTrucker

                I think the part I found is similar but miniaturized and would be soldered in. I guess my real question was to see if there was a better electrical engineering solution to this than just throwing in an a DC-DC converter. I'm also curious if the tachometer pin will work properly if I change the voltage.

                1 Reply Last reply Reply Quote 0
                • undefined
                  michaelr123
                  last edited by michaelr123 21 Jan 2024, 18:56

                  Update pictures:

                  1. AWD installed, 4 motors are all wired up and turning the right way.
                  2. Belts installed, archetype -breakneck tool installed. Toolboard mounted, and ready to go!

                  Can bus has been really easy to setup and I'm loving the simplicity in the wiring out to the tool head. I also made a decision to go for sensorless homing to completely remove the wiring harnesses from the xy axis.

                  Things left to do:

                  1. Tighten and sync AWD motors.
                  2. Finish wiring toolhead.
                  3. Install CPAP fan, wire, program it.
                  4. Print out frame parts for the CPAP fan because. I forgot to print those out.
                  5. Put everything back together and sort out firmware and macros for duet 3!!

                  IMG_2018.jpeg IMG_2017.jpeg

                  1 Reply Last reply Reply Quote 1
                  • undefined
                    DuetUser
                    last edited by 16 May 2024, 15:52

                    I'd like to revive this subject as can you share some experience?

                    We are building a large coreXY with 4 XY motors (nema 17 60mm)
                    I wonder if there are any reasons not to connect two motors to one driver?

                    The drivers are 4.5A so there is some overhead and the setup will be 48 V. We used nema 23 with one driver on Duet 2 ethernet but only on Z axis so they have much less to do and worked for years without problems, but this time they are on XY and there will be a lot of long fast travels.

                    peter

                    undefined 1 Reply Last reply 1 Jun 2024, 16:16 Reply Quote 0
                    • undefined
                      michaelr123 @DuetUser
                      last edited by 1 Jun 2024, 16:16

                      @DuetUser

                      I've done this before for a dual drive Z axis on machines in the past without issue. You could give it a shot and report back how it went? The goals of an AWD system for a Voron is to shorten the belt paths, and to get as much power into the motion system as possible.

                      1 Reply Last reply Reply Quote 0
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