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Using Duet 3Mainboard with external stepper drivers

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  • undefined
    T3P3Tony administrators @FBG
    last edited by 13 Aug 2019, 21:22

    @fbg you can add a lot of expansion boards. If we decide to put 3 external driver connections on each then potentially up to 8 of those expansion boards = 24 drivers!

    www.duet3d.com

    undefined 1 Reply Last reply 18 Aug 2019, 11:01 Reply Quote 0
    • undefined
      FBG @T3P3Tony
      last edited by 18 Aug 2019, 11:01

      @t3p3tony No words.... incredible

      1 Reply Last reply Reply Quote 0
      • undefined
        mpentenr @dc42
        last edited by 18 Oct 2019, 14:29

        @dc42 Are there any news on this topic ?

        undefined 1 Reply Last reply 18 Oct 2019, 14:36 Reply Quote 0
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          dc42 administrators @mpentenr
          last edited by dc42 18 Oct 2019, 14:36

          @mpentenr said in Using Duet 3Mainboard with external stepper drivers:

          @dc42 Are there any news on this topic ?

          Not yet. Now that we have the prototype Tool Board, there are two ways we could support external drivers without needing a new main board:

          1. Do a version of the EXP3HC board with outputs for 3 or just possibly 4 external stepper drivers instead of on-board drivers. This would probably be best for those who are actually using external drivers, not step-servo motors. But we don't expect many people to need external drivers with Duet 3.

          2. Do a version of the Tool Board that has a single set of step/dir/enable outputs, to drive a single external driver or step-servo drive. I think this might be better for those using step-servo motors with built-in controllers.

          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

          undefined 1 Reply Last reply 18 Oct 2019, 15:30 Reply Quote 0
          • undefined
            mpentenr @dc42
            last edited by 18 Oct 2019, 15:30

            @dc42 said in Using Duet 3Mainboard with external stepper drivers:

            @mpentenr said in Using Duet 3Mainboard with external stepper drivers:

            @dc42 Are there any news on this topic ?

            Not yet. Now that we have the prototype Tool Board, there are two ways we could support external drivers without needing a new main board:

            1. Do a version of the EXP3HC board with outputs for 3 or just possibly 4 external stepper drivers instead of on-board drivers. This would probably be best for those who are actually using external drivers, not step-servo motors. But we don't expect many people to need external drivers with Duet 3.

            That would be my favorite, because of my 2pt100(bed) and 3K-Type Thermocouple (Pellet Extruder) which I cant connect to the tool board or is it possible to use thermo connectors on one board and step/dir/ena on another board for one "axis/extruder"? I also would need 2 of these boards, because of the 3 (X/Y/Z)axis with external drivers and up to 3 external drivers for the (pellet)extruders.

            1. Do a version of the Tool Board that has a single set of step/dir/enable outputs, to drive a single external driver or step-servo drive. I think this might be better for those using step-servo motors with built-in controllers.

            Please take into account, that the Vin for example for my pellet extruder is 48V, when designing the driverless Tool Board with step/dir/ena output.

            Thanks
            Marc Pentenrieder

            1 Reply Last reply Reply Quote 0
            • undefined
              dc42 administrators
              last edited by 18 Oct 2019, 16:02

              @mpentenr, what motors and drivers do you plan to use on that machine? Although we don't support as much as 48V at present, we are considering making variations of main and/or expansion boards that support up to about 54V. The TMC5160 drivers can take 60V, it's just the voltage regulators we use that limit us to around 35V.

              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

              undefined 1 Reply Last reply 18 Oct 2019, 16:21 Reply Quote 0
              • undefined
                mpentenr @dc42
                last edited by 18 Oct 2019, 16:21

                @dc42 Hi, on the 3 axis I am using 1KW 380V Servo Motors and on the pellet extruder, I am using the following:
                Motor Driver: https://us.nanotec.com/products/1768-c5-e-2-09-motor-controllerdrive-for-canopen-or-usb/

                Stepper motor: https://us.nanotec.com/products/574-st8918m6708-a/

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                • undefined
                  dc42 administrators
                  last edited by dc42 18 Oct 2019, 16:33

                  Thanks. Are you using the encoder input on the stepper driver for the pellet extruder? What is the maximum rotation speed needed by the pellet extruder motor? Have you established that you really do need 48V to drive it?

                  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

                  undefined 1 Reply Last reply 18 Oct 2019, 16:36 Reply Quote 0
                  • undefined
                    mpentenr @dc42
                    last edited by mpentenr 18 Oct 2019, 16:36

                    @dc42 said in Using Duet 3Mainboard with external stepper drivers:

                    Thanks. Are you using the encoder input on the stepper driver for the pellet extruder? What is the maximum rotation speed needed by the pellet extruder motor?

                    No, I am not using the encoder input (at the moment, perhaps I need to).
                    The max rotational speed will be around 500 rpm, because of an 10:1 gearbox on the stepper, so up to 50 rpm at the pelletextruderspindle

                    undefined 1 Reply Last reply 18 Oct 2019, 16:39 Reply Quote 0
                    • undefined
                      mpentenr @mpentenr
                      last edited by mpentenr 18 Oct 2019, 16:39

                      @mpentenr said in Using Duet 3Mainboard with external stepper drivers:

                      @dc42 said in Using Duet 3Mainboard with external stepper drivers:

                      Thanks. Are you using the encoder input on the stepper driver for the pellet extruder? What is the maximum rotation speed needed by the pellet extruder motor?

                      No, I am not using the encoder input (at the moment, perhaps I need to).
                      The max rotational speed will be arounf 500 rpm, because of an 10:1 gearbox on the stepper, so up to 50 rpm at the pelletextruderspindle

                      At the moment the pellet extruder is highly experimental, so I don't know the exact values. Time and experiments will show 😉

                      1 Reply Last reply Reply Quote 0
                      • undefined
                        mpentenr
                        last edited by 10 Feb 2020, 16:49

                        @mpentenr said in Using Duet 3Mainboard with external stepper drivers:

                        @dc42 Are there any news on this topic ?

                        Hi dc42, are there any news on driverless duet3 or addon boards for driving motors with external drivers ?!

                        undefined 1 Reply Last reply 10 Feb 2020, 17:24 Reply Quote 0
                        • undefined
                          dc42 administrators @mpentenr
                          last edited by 10 Feb 2020, 17:24

                          @mpentenr said in Using Duet 3Mainboard with external stepper drivers:

                          @mpentenr said in Using Duet 3Mainboard with external stepper drivers:

                          @dc42 Are there any news on this topic ?
                          

                          Hi dc42, are there any news on driverless duet3 or addon boards for driving motors with external drivers ?!

                          We have a few tool board prototypes modified to drive a single external driver at 5V signals levels. We will turn this into a production item. We still need to lay it out on a PCB, but that shouldn't take long, because the design is based on our Tool Board.

                          We haven't yet made a decision on whether to make a driverless version of the main board.

                          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

                          1 Reply Last reply Reply Quote 0
                          • undefined
                            Kyle_55
                            last edited by 14 Feb 2020, 23:00

                            DC42,
                            I would be interested in a driver-less version as well. Don't get me wrong, those 5160's are nice but I already have $200 invested in my hobby CNC's external drivers and when / if I make the switch from the UC100 to the Duet , I will also be getting a Duet wifi for my 3d printer. The thought of spending $400 + on the upgrade while shelving $400 in parts with no use is a real bummer. And I get that an $800 hit is nothing for most, but for a guy just trying to learn a new hobby....

                            Kyle

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                            • undefined
                              wi10008
                              last edited by wi10008 24 Feb 2020, 16:20

                              Hi @dc42,

                              I'm interested in triggering camera exposures that synchronise with the X/Y axis motors. My camera has a 5V logic trigger input. Would the driverless Tool Board work to drive the camera as if it were an extuder?

                              I'd like to use the steps/mm setting as "exposures"/mm.

                              1 Reply Last reply Reply Quote 0
                              • Danalundefined
                                Danal
                                last edited by 24 Feb 2020, 17:01

                                Yes.

                                But you can do this today. There are plenty of IO ports with outputs. These are 3.3V, but 3.3 V out to 5 V in logic almost always works.

                                You then trigger the camera with M42

                                Delta / Kossel printer fanatic

                                undefined 1 Reply Last reply 24 Feb 2020, 21:32 Reply Quote 0
                                • undefined
                                  dc42 administrators @Danal
                                  last edited by 24 Feb 2020, 21:32

                                  @Danal said in Using Duet 3Mainboard with external stepper drivers:

                                  Yes.

                                  But you can do this today. There are plenty of IO ports with outputs. These are 3.3V, but 3.3 V out to 5 V in logic almost always works.

                                  You then trigger the camera with M42

                                  On the v1.0 Duet 3 main boards there is also the output marked Laser/VFD, which is 5V.

                                  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

                                  1 Reply Last reply Reply Quote 0
                                  • undefined
                                    FBG
                                    last edited by 10 Apr 2020, 15:49

                                    Any news about this?
                                    For the moment there are not possibility of connect a external stepper/servo driver?

                                    It is the only thing that blocks me from buying Duet3, and I must continue buying Duet2 with expansion board.

                                    And the Duet3 have important things that i want start to approach immediately.

                                    Best Regards

                                    1 Reply Last reply Reply Quote 0
                                    • alil2096undefined
                                      alil2096
                                      last edited by 25 Apr 2020, 10:00

                                      Good orning, any news for this expansion board?

                                      Because I use the duet 2 wifi for 2 external motor..

                                      if even the duet 3 had the possibility to connect I would buy it immediately!

                                      Thanks,

                                      Andrea

                                      www.lillia.net

                                      Facebook page

                                      1 Reply Last reply Reply Quote 0
                                      • nhofundefined
                                        nhof
                                        last edited by 28 Apr 2020, 19:47

                                        @dc42 I am also interested in external drivers for Duet 3.

                                        Any update on plans / schedule?

                                        undefined 1 Reply Last reply 29 Apr 2020, 21:28 Reply Quote 0
                                        • undefined
                                          dc42 administrators @nhof
                                          last edited by 29 Apr 2020, 21:28

                                          @nhof said in Using Duet 3Mainboard with external stepper drivers:

                                          @dc42 I am also interested in external drivers for Duet 3.

                                          Any update on plans / schedule?

                                          The prototype external stepper driver boards were ordered some time ago. They are taking a little longer than usual because both the assembly companies we use had to shut down temporarily in order to rearrange their production lines to facilitate social distancing, and even now are probably operating at reduced capacity. We should be getting them soon.

                                          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

                                          1 Reply Last reply Reply Quote 1
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