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    Issues powering up with DUEX5 connected to Duet2 crashing

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    • Dougal1957undefined
      Dougal1957
      last edited by

      Posted for a friend who is having trouble joining the forum (Details passed separately)

      I have tried a bunch of times to register but it keeps saying the captcha is unverified. So I can’t even get on to ask a question. Heh. But this is my issue. When I power up, and both boards are connected to 24v as power in (BUT THE EXPANSION CABLE IS NOT CONNECTED) everything boots up fine and I can surf to the web interface. I’ve done a M115 with just usb connected AND the expansion cable connected and it reports all hardware correctly. I’m running 2.04RC1. When I connect the expansion cable and 24v is also connected, it stalls and the diag light blinks. A few times on the panel due screen it’s popped a motor shorted to ground error and a temp shutdown on a motor. Because of that I also unplugged all motors and repeated with everything connected. Still no go. If I remove just the 24v power, but it’s running on the 5v psu, it will power up and allow me to see the web interface. I’ve done the short and thick ground cable between boards.

      alt text
      This is with 5/12v psu running, cable attached, but no 24v

      alt text
      I’ve checked for grounding issues and power are spot on at 23.99~24v

      Thanks for any help

      Dougal1957undefined 1 Reply Last reply Reply Quote 0
      • Dougal1957undefined
        Dougal1957 @Dougal1957
        last edited by

        @dougal1957 A bit more info from Nuramori

        0_1567784865882_10a15dc2-c0f1-4218-8c28-0695d00df269-image.png

        Dougal1957undefined 1 Reply Last reply Reply Quote 0
        • Dougal1957undefined
          Dougal1957 @Dougal1957
          last edited by

          @dougal1957
          alt text

          alt text

          1 Reply Last reply Reply Quote 0
          • fcwiltundefined
            fcwilt
            last edited by

            Hi,

            Those power connections look rather thin - what gauge wire are you using?

            Frederick

            Printers: a small Utilmaker style, a small CoreXY and a E3D MS/TC setup. Various hotends. Using Duet 3 hardware running 3.4.6

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            • Dougal1957undefined
              Dougal1957
              last edited by

              there is no load on them at this stage

              deckingmanundefined fcwiltundefined 2 Replies Last reply Reply Quote 0
              • deckingmanundefined
                deckingman @Dougal1957
                last edited by

                @dougal1957 said in Issues powering up with DUEX5 connected to Duet2 crashing:

                there is no load on them at this stage

                Even so.....Have you seen this Doug? https://duet3d.dozuki.com/Wiki/Duex2_and_Duex5_Features

                Particularly, if you scroll down a bit you'll find quote........

                "Important! You must have a reliable low-resistance connection between the negative (ground) terminals of the two VIN terminal blocks. Failure to do so may result in high currents flowing in the ground connectors of the ribbon cable and may cause damage to the Duet 2 or Duex. Preferably, make this connection using either solid core wire, or stranded core wire with ferrules of the correct size crimped on securely. Re-tighten the terminal block screws regularly for the first few days of use, to make sure there is no creep in the wires causing the screws to become loose. "

                Might be worth checking. There is some stuff in that link abopt the ribbon cable too (in case you haven't already seen it).

                Cheers

                Ian
                https://somei3deas.wordpress.com/
                https://www.youtube.com/@deckingman

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                • fcwiltundefined
                  fcwilt @Dougal1957
                  last edited by

                  @dougal1957 said in Issues powering up with DUEX5 connected to Duet2 crashing:

                  there is no load on them at this stage

                  Not sure what you mean.

                  If the boards are powered up there is current flowing through those wires.

                  The way I have wired all of my Duet2/Duex5 setups is by connecting both the + and - power terminals with solid 14 gauge wire. Then I tap into the middle of each with stranded 14 gauge wire and run those to the power supply.

                  I have never had anything like the issues mentioned.

                  Frederick

                  Printers: a small Utilmaker style, a small CoreXY and a E3D MS/TC setup. Various hotends. Using Duet 3 hardware running 3.4.6

                  1 Reply Last reply Reply Quote 0
                  • Dougal1957undefined
                    Dougal1957
                    last edited by Dougal1957

                    if you look the main feeds are actually 16 AWG but the link between the 2 boards is quite a bit thicker 12AWG Apparently by No load I mean no motors or anything connected this is weird and is not mine so posted on behalf of a friend who every time he tries to register the Captcha throughs an error and won't complete.

                    1 Reply Last reply Reply Quote 0
                    • Dougal1957undefined
                      Dougal1957
                      last edited by

                      Apparently the issue sort of goes away if he disconnects the 40 way ribbon and further test seem to show that with it all connected up on the power and 40 way stuff the board will boot up and stay up with USB Connected but when the 24V is applied the boards reboot at approximately 15s cycle which is also very weird.

                      Cables from the PSU are 16AWG and the Ground link between the boards is 12AWG

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                      • fcwiltundefined
                        fcwilt
                        last edited by

                        Has he tried a different power supply?

                        Frederick

                        Printers: a small Utilmaker style, a small CoreXY and a E3D MS/TC setup. Various hotends. Using Duet 3 hardware running 3.4.6

                        1 Reply Last reply Reply Quote 0
                        • dc42undefined
                          dc42 administrators
                          last edited by

                          Are any endstop switches or other devices connected to the endstop inputs on the DueX5? If yes, disconnect them and try again. If no, then I suspect that the DueX5 is faulty so please ask your supplier for a replacement under warranty.

                          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

                          Dougal1957undefined 1 Reply Last reply Reply Quote 0
                          • Dougal1957undefined
                            Dougal1957 @dc42
                            last edited by

                            @dc42 Thank you David I will pass it on this is the user I emailed you and tony about the Captcha is failing to allow him to register.

                            Doug

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                            • Nuramoriundefined
                              Nuramori
                              last edited by Nuramori

                              Hello all. I was able to get registered, and I thank Doug for assisting in being my proxy until I was able to get situated.

                              I’ll address some of the points raised and the results of the last suggestion.

                              All power wiring is 16awg; the ground connection between the duet and duex (as seen labeled on the wire in the first picture) is 12awg. I performed the last recommended test (unplugging the E6 endstop connection I had) and rebooted. The result was everything worked perfectly. The connection is a NO switch connection. It’s part of an emergency stop switch that’s NC/NC + NO. The two NC is hardwired to cut power to the 24v psu and the NO is intended to be connected to E6 so when the button is activated power is cut and the duet can respond to the condition (the duet is powered by a separate 12v/5v psu). I then moved the connection all other stops on the duex, and the issue would repeat on each of those, always working fine once it was removed. When I attached it to the E1 endsrop on the Duet, it would work as intended and not exhibit the problems seen when attached to a duex endstop.

                              I did note that there was a post 1.19 change to configuring endstop use, but when commented out the issues remained, so it wasn’t the config file that contributed to the issue.

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                              • dc42undefined
                                dc42 administrators
                                last edited by

                                What's happening is that your NO endstops are picking up a lot of noise. This is a hazard with NO endstops, and is one of the reasons why NC endstops are preferred. So I suggest you change your endstops to use the NC connections. Alternatively, connecting a resistor of between 1K and 3K between the STP and +3.3V pins of the endstop connector may work; or a capacitor of about 10nF in parallel with the endstop switch.

                                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

                                Nuramoriundefined 1 Reply Last reply Reply Quote 0
                                • Nuramoriundefined
                                  Nuramori @dc42
                                  last edited by

                                  @dc42 thanks for the info! I’ll see if I can find another emergency stop switch that has more than two NC and/or the other two suggestions. Appreciate the help.

                                  1 Reply Last reply Reply Quote 0
                                  • Nuramoriundefined
                                    Nuramori
                                    last edited by

                                    ok, I split the difference and put a 2.49k pullup resistor between 3.3v and the stop. all is well now!

                                    Thanks to everyone.

                                    1 Reply Last reply Reply Quote 1
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