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Duet 3 Mainboard 6HC - initial production run.

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  • undefined
    T3P3Tony administrators @LeonMF
    last edited by 16 Aug 2019, 20:34

    @leonmf in addition to the good points about Raspberry pi versions already made, regarding the screen: The idea is that there are a multitude of HDMI and direct interface touch screen available for Raspberry Pi so you have much more choice. at the simplest level you can have DWC running on the touch screen in a maximised browser but i am sure there will be a range of UI options developed to suite different screen and requirements. The advantage of doing this on the SBC is its much easier to make UI changes than on the PanelDue.

    www.duet3d.com

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      LeonMF
      last edited by 16 Aug 2019, 21:21

      Thanks everyone!

      @T3P3Tony I had this argument with the M3D team when they argued that the PanelDue was a waste of time. 🙂

      The PanelDue is certainly limited in what it does and how it operates but that's part of the benefit. Fundamentally, it just works and the M3D argument of buying a cheap tablet and using it as a UI completely missed the point that you just need the ability to poke a jog or home button without the drama of maybe the tablet went to sleep or the UI wasn't built for touch.

      But... if you're saying that there will likely be a touch friendly UI that works with the SBC and the SBC being operational is required for the unit then I likely have little to complain about!

      Current: Railcore II ZLT w/Duet 3 and Hemera hot end.
      Retired: Robo3D R1,BI V2.5 Delta updated to BerryBot magnets, bespoke carriages and Duet Ethernet, M3D Promega;

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        LeonMF
        last edited by 16 Aug 2019, 21:27

        Posted in a separate comment for clarity.

        Some time ago, I used to run my home automation system on Raspberry Pi. Then, after that, I ran my home audio on Raspberry Pis. They did work pretty well but were more prone to corruption than I'd like.

        The beauty of an embedded board like the Duet 2 is that powering it down and back up meant that it was still going to come back up fine.

        My experience with Raspberry Pis were that they are a full OS and don't particularly love being shut down without going through a clean shutdown. Something that a device with an off-switch isn't all that great for. Perhaps my early experiences with Raspberry Pis reflect a fear about dirty shutdown corruption that isn't a reality any more. Do I have any reason to be concerned on this or are my fears several years out of date?

        Current: Railcore II ZLT w/Duet 3 and Hemera hot end.
        Retired: Robo3D R1,BI V2.5 Delta updated to BerryBot magnets, bespoke carriages and Duet Ethernet, M3D Promega;

        undefined undefined undefined 3 Replies Last reply 16 Aug 2019, 21:54 Reply Quote 2
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          minim
          last edited by 16 Aug 2019, 21:34

          It will be fun to see the improvement but I don't fancy the idea of a SBC at all. I kinda need it for the stepper drivers on nema 23s.. Time will tell if SBC was the correct decision I guess 🙂

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            A Former User
            last edited by 16 Aug 2019, 21:35

            I was actually thinking about that the other day, most of the issues can be mitigated by having the system run with the majority of the operating system as read-only under normal operations. I don't know what is planned, but it quite doable to make the Duet 3 image fairly resilient with respect to unexcpected shutdowns.

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              Phaedrux Moderator @LeonMF
              last edited by 16 Aug 2019, 21:54

              @leonmf said in Duet 3 Mainboard 6HC - initial production run.:

              My experience with Raspberry Pis were that they are a full OS and don't particularly love being shut down without going through a clean shutdown.

              I may be lucky, but I have never shut down a pi cleanly. Always just pulled the power on the poor little things. Never had any ill effects.

              Z-Bot CoreXY Build | Thingiverse Profile

              undefined 1 Reply Last reply 17 Aug 2019, 05:55 Reply Quote 1
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                DocTrucker @Phaedrux
                last edited by DocTrucker 17 Aug 2019, 05:55

                @phaedrux think this is more like to be a problem if the DWC solution on the computer does some heavy background processing like simulation.

                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!

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                  JoergS5 @LeonMF
                  last edited by JoergS5 17 Aug 2019, 07:00

                  @leonmf so maybe it's better to setup the operating system as read-only, similar to http://hallard.me/raspberry-pi-read-only/
                  and held the non volatile data in a separate storage.

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                    T3P3Tony administrators
                    last edited by 17 Aug 2019, 07:51

                    Good points. One way to go is to have the power configured so the Raspi does not shut down, or at least is in charge of the shutdown. So power off just sets the printer into a low power sleep mode where the 24V is off and only a little 5V is used to keep the Pi idling... When you turn a modern TV or whatever that is what happens...

                    www.duet3d.com

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                      dc42 administrators @Knaudler
                      last edited by 20 Aug 2019, 12:23

                      @knaudler said in Duet 3 Mainboard 6HC - initial production run.:

                      screws for Power ?
                      something like this would be nice:
                      https://www.wago.com/de/leiterplattenanschluss/klemmenleiste-fuer-leiterplatten/p/2716-102

                      I've taken a look at the Wago range of push-in connectors. Many of them are either too large or very expensive. The most suitable 6-way one I found was this one https://uk.farnell.com/wago/2092-1376/terminal-block-wire-to-brd-6pos/dp/2352417. Like most push-in terminals blocks, it's only suitable for use with solid core wire or stranded wire that has been terminated with ferrules already. So if you need to use stranded core wire, it doesn't avoid the need for crimping, and it's hard to justify the additional cost.

                      For the home user, an advantage of the barrier strips we currently use is that crimping tools for automotive-style fork receptacles are very cheap. But I can see that some OEMs might prefer push-in terminals to speed up wiring.

                      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
                        last edited by 20 Aug 2019, 13:18

                        Back in the day, we ended up with a compromise and used pluggable terminals where phoenix contacts had both screw and push-in female connectors, the boards used the same male header (but that was only up to about 10A iirc)

                        Also found that you could use stranded wire without ferrules, but then you loose the tool-less advantage as you need to press the release spring to insert the stranded wire. And something like Radox 125 is wound so tight it can be inserted without ferrules in a pinch, but for production you'll want ferrules anyways.

                        But yes, quite significant savings on wiring time with push-in terminals when wiring is prepared by machines automatically cutting, stripping, labeling and crimping ferrules. However unless you have the machines I doubt its worth the investment for a single 6-pin terminal.

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                          JoergS5 @LeonMF
                          last edited by 20 Aug 2019, 14:05

                          @leonmf I bought a Pi 3+, but will buy a Pi 4 also, because he has a lot more I2C and SPI interfaces (about 5 each, 3 + has only one useable SPI, which will be used to communicate to Duet), so if one wants to use Pi4 for additional tasks like using cameras (e.g. Arducam with SPI/I2C interface), additional I2C and SPI are useful.

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                            KP0005
                            last edited by 21 Aug 2019, 16:43

                            Regarding the SPI connection, would it in theory be possible to connect a Maestro to the SBC in a similar way?

                            undefined 1 Reply Last reply 21 Aug 2019, 16:58 Reply Quote 0
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                              dc42 administrators @KP0005
                              last edited by 21 Aug 2019, 16:58

                              @matej101 said in Duet 3 Mainboard 6HC - initial production run.:

                              Regarding the SPI connection, would it in theory be possible to connect a Maestro to the SBC in a similar way?

                              In theory yes, with a lot of firmware changes. Ideally the W5500 Ethernet chip would be removed to free up the fast SPI connection. I guess the daughter board SPI could be used instead, at a lower speed and by dropping support for external SD card sockets and temperature daughter boards.

                              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 21 Aug 2019, 19:32 Reply Quote 0
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                                KP0005 @dc42
                                last edited by 21 Aug 2019, 19:32

                                @dc42 thank you for the quick reply! I'm not really experienced with programming so redoing part of the firmware seems to be a bit of a stretch for my use case. Guess I'll just hack something together instead.

                                ? 1 Reply Last reply 21 Aug 2019, 19:42 Reply Quote 0
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                                  A Former User @KP0005
                                  last edited by A Former User 21 Aug 2019, 19:42

                                  @matej101 said in Duet 3 Mainboard 6HC - initial production run.:

                                  @dc42 thank you for the quick reply! I'm not really experienced with programming so redoing part of the firmware seems to be a bit of a stretch for my use case. Guess I'll just hack something together instead.

                                  No hacking needed just buy a Duet 3..............

                                  undefined 1 Reply Last reply 21 Aug 2019, 20:03 Reply Quote 0
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                                    KP0005 @A Former User
                                    last edited by 21 Aug 2019, 20:03

                                    @calvinx but money...

                                    undefined 1 Reply Last reply 26 Aug 2019, 19:24 Reply Quote 0
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                                      mundsen
                                      last edited by 26 Aug 2019, 19:11

                                      Order one today, plan to use it in my Corexy project 🥰

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                                        dc42 administrators @KP0005
                                        last edited by 26 Aug 2019, 19:24

                                        @matej101 said in Duet 3 Mainboard 6HC - initial production run.:

                                        @calvinx but money...

                                        It's occurred to me that a Duet Ethernet without the Ethernet daughter board should be relatively straightforward to connect to a RPi. Maybe I'll add support for this in the future.

                                        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 undefined undefined 3 Replies Last reply 26 Aug 2019, 20:42 Reply Quote 2
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                                          gtj0 @dc42
                                          last edited by 26 Aug 2019, 20:42

                                          @dc42 said in Duet 3 Mainboard 6HC - initial production run.:

                                          It's occurred to me that a Duet Ethernet without the Ethernet daughter board should be relatively straightforward to connect to a RPi. Maybe I'll add support for this in the future.

                                          That could be VERY handy!

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