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    Duet3D PCB delta printer effector sneak preview

    Scheduled Pinned Locked Moved
    Smart effector for delta printers
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    • Whitewolfundefined
      Whitewolf
      last edited by

      Not sure on pricing but lumbergautomation (Belden) makes a similar plug as well

      Exploring the universe wherever the tech blows

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      • Dougal1957undefined
        Dougal1957
        last edited by

        they are also very bulky for installing on a effector and I suspect have considerable more mass than a pair of Molex headers which are probably just as quick to disconnect!

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        • A Former User?
          A Former User
          last edited by

          Cant you just use a suitable IDC connector for both signal and power

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          • elmoretundefined
            elmoret
            last edited by

            IDC isn't suitable for hotends, as they can draw 3.3 amps, even 5 amps in the case of some 60 watt cartridges.

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            • A Former User?
              A Former User
              last edited by

              @elmoret:

              IDC isn't suitable for hotends, as they can draw 3.3 amps, even 5 amps in the case of some 60 watt cartridges.

              I was thinking along the lines of doubling up spreading the load across the connectors, 24v on a 60 watt heater cartridge comes out at 2.5 amps so if you use for example
              16 way flat ribbon cable 28 AWG (7x36) Stranded 300V that should work.

              Just in the same way some are powering nema 17's with CAT5/6

              But hey I'm a Mech Eng not Electrical….

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              • dc42undefined
                dc42 administrators
                last edited by

                Yes it's possible to use ribbon cable to carry power if you use enough conductors. My Ormerod 1 uses ribbon cable to power the 10A bed heater. I think it's a 40 way cable using 19 ways in each direction to carry the heater current and 2 for the thermistor. To connect a hot end this way, then in order to allow for using a 12V 50W heater plus fans etc. you would need about 28 conductors, making it quite a wide ribbon cable and difficult to wrap around a Bowden tube on a delta printer. A!so, you would want to have the Duet designed with a matching ribbon cable connector on it.

                For future intelligent hot end designs and Duets, I'm looking at using one RJ11 connector to carry the signals and a 2-pin power connector of some sort to carry 12V or 24V power. But for now the smart effector is designed to work with the current generation of Duet electronics (and perhaps other electronics too) so that is a not a possibility. On my own delta I plan to change the wiring to use two 8-core cables: one for the signals, and the other for the heater (using 2 pairs of conductors in parallel) and fans.

                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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                • A Former User?
                  A Former User
                  last edited by

                  @dc42:

                  Yes it's possible to use ribbon cable to carry power if you use enough conductors. My Ormerod 1 uses ribbon cable to power the 10A bed heater. I think it's a 40 way cable using 19 ways in each direction to carry the heater current and 2 for the thermistor. To connect a hot end this way, then in order to allow for using a 12V 50W heater plus fans etc. you would need about 28 conductors, making it quite a wide ribbon cable and difficult to wrap around a Bowden tube on a delta printer. A!so, you would want to have the Duet designed with a matching ribbon cable connector on it.

                  For future intelligent hot end designs and Duets, I'm looking at using one RJ11 connector to carry the signals and a 2-pin power connector of some sort to carry 12V or 24V power. But for now the smart effector is designed to work with the current generation of Duet electronics (and perhaps other electronics too) so that is a not a possibility. On my own delta I plan to change the wiring to use two 8-core cables: one for the signals, and the other for the heater (using 2 pairs of conductors in parallel) and fans.

                  If you are going to dual 8 core (16 total) you could use the 4 twisted pair RJ45 plugs mated to PCB mounted 8 way RJ45 sockets and silicone 8 core wire should be flexible enough.

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                  • elmoretundefined
                    elmoret
                    last edited by

                    @CaLviNx:

                    I was thinking along the lines of doubling up spreading the load across the connectors, 24v on a 60 watt heater cartridge comes out at 2.5 amps so if you use for example
                    16 way flat ribbon cable 28 AWG (7x36) Stranded 300V that should work.

                    Just in the same way some are powering nema 17's with CAT5/6

                    But hey I'm a Mech Eng not Electrical….

                    Doubling up pins is bad practice. There's no way to guarantee the load is shared evenly - if the resistance of one is a bit different, the load seeks the lower resistance path.

                    Ask Rigidbot how it worked out to spread a load across multiple pins. Here's an example:

                    https://plus.google.com/101640661041406923828/posts/SL7EXPS1Rro

                    Molex MicroFit connectors are rated for 5 amps and would be a more suitable choice.

                    Nema17 over Cat5/6 is reasonable, as they make RJ45 connectors rated at 1.5 amps which is typical for a stepper motor. The biggest issue using network cable on a stepper motor is the repeated flexing.

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                    • kraegarundefined
                      kraegar
                      last edited by

                      You can get stranded core RJ45 that's still rated for 1.5 amps.

                      Co-Creator of the RailcoreII CoreXY printer
                      https://www.thingiverse.com/thing:2407174

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                      • elmoretundefined
                        elmoret
                        last edited by

                        Yes, but not everyone knows that. Better stated: The biggest issue with network cable on stepper motors is folks using solid core cable which can't handle the flexing.

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                        • A Former User?
                          A Former User
                          last edited by

                          @elmoret:

                          Doubling up pins is bad practice.

                          Bad practice… hahahaha

                          Try being in the field and the company man is screaming to get the job done !!! If you think Deepwater Horizon was far fetched on that front think again... anyway

                          "if" I was doubling up on pins I would be doing it for myself and not worry about a pissing contest of who did what where or when and live with the consequences of that choice.

                          So to get back on topic I see a need (for me anyway) for the following to go the effector.

                          X2 wires for the Heater cartridge. (of a suitable gauge to handle the required load)
                          X2 wires for the Hot end temp signal
                          X1 "live" to feed the hot end fan, cooling fan and any lighting (again of a suitable gauge to handle the required load)
                          X3 "signal earths" for controlling the fans & lighting

                          And any additional wires to cover the contact sensor requirements

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                          • A Former User?
                            A Former User
                            last edited by

                            @elmoret:

                            Yes, but not everyone knows that. Better stated: The biggest issue with network cable on stepper motors is folks using solid core cable which can't handle the flexing.

                            Hence my comment to David about using flexible silicone wire, which in hindsight was a stupid comment as he more than likely understands that better than most.

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                            • A Former User?
                              A Former User
                              last edited by

                              Hi guys

                              Any update on this kit being released. Yet

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                              • dc42undefined
                                dc42 administrators
                                last edited by

                                There is a 5-week lead time on the modified E3D heatsinks, and the order has only just been placed. We are waiting for feedback from beta testers before we finalise the rest of the design, but unless that results in major changes then we can manufacture production electronics more quickly than that. So I hope we will be shipping kits about 6 weeks from now.

                                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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                                • botundefined
                                  bot
                                  last edited by

                                  Is there any chance to get two or four of those heatsinks either through you or e3d around that time? I'd love to use the screw-top mount over the groove mount.

                                  *not actually a robot

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                                  • A Former User?
                                    A Former User
                                    last edited by

                                    @dc42:

                                    There is a 5-week lead time on the modified E3D heatsinks, and the order has only just been placed. We are waiting for feedback from beta testers before we finalize the rest of the design, but unless that results in major changes then we can manufacture production electronics more quickly than that. So I hope we will be shipping kits about 6 weeks from now.

                                    I would like to buy the effector and plate adapters, dont need anything E3d I already have an adapter system 90% ready to allow me to use my Prometheus hot end in the same manner as your pics show. I just need the effector to allow me to 100% match the hole spacing.

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                                    • T3P3Tonyundefined
                                      T3P3Tony administrators
                                      last edited by

                                      Once we have finalised the design I will publish the dimensions

                                      www.duet3d.com

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                                      • a96bimmerm3gmail.comundefined
                                        a96bimmerm3gmail.com
                                        last edited by

                                        Do you guys have any ETA on this? I'm really excited about it, looks perfect for what I need.

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                                        • dc42undefined
                                          dc42 administrators
                                          last edited by

                                          See my previous post.

                                          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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                                          • a96bimmerm3gmail.comundefined
                                            a96bimmerm3gmail.com
                                            last edited by

                                            Six weeks, sorry. I was a little overzealous!

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