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    Damaged board

    Duet Hardware and wiring
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    • Exzile
      Exzile last edited by

      I just setup a duet 5 and when I powered it on and blew a fuse. I replaced the fuse and checked connections. I repowered it and it seems to have melted the drivers.
      PXL_20211028_142329486.jpg

      T3P3Tony 1 Reply Last reply Reply Quote 0
      • T3P3Tony
        T3P3Tony administrators @Exzile last edited by

        @exzile wow. What motors did you have plugged in?

        www.duet3d.com

        Exzile 1 Reply Last reply Reply Quote 0
        • Exzile
          Exzile @T3P3Tony last edited by

          @t3p3tony the nema16 I believe. I did get a new PSU and maybe I had the polarity backwards? Or both ++? The new PSU has the labels shifted I noticed. I removed all the wires and rewired it after the fuse blew to prevent any damage. But I think it may have been to late
          PXL_20211028_143724161.jpg 16354323729081148230480601255432.jpg 16354323893173119575975572128491.jpg

          Exzile alankilian T3P3Tony weed2all zapta 5 Replies Last reply Reply Quote 0
          • Exzile
            Exzile @Exzile last edited by

            I was figuring the board might be defective but then again it could be the PSU. I'm afraid to hook it into my old board to try.

            1 Reply Last reply Reply Quote 0
            • alankilian
              alankilian @Exzile last edited by

              @exzile said in Damaged board:

              I did get a new PSU and maybe I had the polarity backwards?

              Oh man, that's going to blow you board up.

              This is the thing I worry about most when hooking up a new system and I

              • ALWAYS leave the power supply connections for last and
              • ALWAYS check them with a voltmeter right at the wires I'm about to hook to my new board to verify the polarity and voltage is correct.

              I still sometime hook things up backwards and blow them up.

              SeemeCNC Rostock Max V3 converted to V3.2 with a Duet2 Ethernet Firmware 3.2 and SE300

              1 Reply Last reply Reply Quote 1
              • T3P3Tony
                T3P3Tony administrators @Exzile last edited by T3P3Tony

                @exzile yes that does look like reverse polarity killed it. That form of miswiring is not covered by the warranty.

                www.duet3d.com

                1 Reply Last reply Reply Quote 0
                • weed2all
                  weed2all @Exzile last edited by weed2all

                  @exzile another case of "buy a good known brand psu"...I'm only using meanwell psu...it coast a bit more than chinese stuff but then again you get what you pay I guess, and always check the output ⚡with multimeter to be 100% sure...

                  https://www.thingiverse.com/weed2all/designs

                  deckingman 1 Reply Last reply Reply Quote 0
                  • deckingman
                    deckingman @weed2all last edited by

                    @weed2all said in Damaged board:

                    @exzile.............. another case of "buy a good known brand psu"...I'm only using meanwell psu...it coast a bit more than chinese stuff ........................

                    Whilst I agree with the sentiment, and use Meanwell PSUs myself, unfortunately if you bought a genuine Meanwell PSU, the chances are high that it was in fact made in China. Their production bases are in Taipie (technically that's in Taiwan but the Chinese Communist Party say that is part of China), Huadu district in Ghanzhou, and Suzhou City in China. Although since 2019 they do have another production base in Bangalore, so it might have been made in India rather than China. 🙂

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

                    jens55 weed2all 2 Replies Last reply Reply Quote 0
                    • jens55
                      jens55 @deckingman last edited by

                      @deckingman, China is quite capable of producing quality components so the actual location where something is produced is not that significant. The problem arises when a clone manufacturer decides to use cheaper components or processes to increase the profit margin.

                      weed2all 1 Reply Last reply Reply Quote 0
                      • weed2all
                        weed2all @jens55 last edited by

                        @jens55 you're right that chinese stuff can be good...but the problem with the clones is exactly what you said...it uses cheap components to achieve lower prices...as I said is preferably to get a good known brand psu in this case for a few $ more and never have issues than to cut corners and buy cheap no brand no name psu...

                        https://www.thingiverse.com/weed2all/designs

                        jens55 1 Reply Last reply Reply Quote 0
                        • weed2all
                          weed2all @deckingman last edited by

                          @deckingman it doesn't even matter much where it is made either in China or India or Vietnam because is made under a name/brand and use good quality components and the QC is also way better...

                          https://www.thingiverse.com/weed2all/designs

                          deckingman 1 Reply Last reply Reply Quote 0
                          • jens55
                            jens55 @weed2all last edited by

                            @weed2all .... yup, I also only use Meanwell power supplies. I also only buy these from reputable sources (not Amazon or Ebay) because there are way more clones out there than a person would think .... and they are extremely difficult to differentiate from the real thing.

                            zapta 1 Reply Last reply Reply Quote 0
                            • zapta
                              zapta @Exzile last edited by

                              @exzile said in Damaged board:

                              The new PSU has the labels shifted I noticed.

                              Yes, that looks odd, as if you connected to two COMs. Can be dangerous it causes you to shift the mains inputs. I wouldn't expect this from a meanwell.

                              1 Reply Last reply Reply Quote 0
                              • deckingman
                                deckingman @weed2all last edited by

                                @weed2all We are in agreement. In fact the opening sentence of my post said exactly that. I was just pointing out that as something like 30% of all manufactured goods originate from China, it would be difficult to find anything which does not originate or at least contain some components which originate from China.

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

                                weed2all 1 Reply Last reply Reply Quote 0
                                • weed2all
                                  weed2all @deckingman last edited by weed2all

                                  @deckingman ohh right...though that you stated it is not good if made in china...it was 1am here when I read your post😇😇

                                  https://www.thingiverse.com/weed2all/designs

                                  dc42 1 Reply Last reply Reply Quote 0
                                  • dc42
                                    dc42 administrators @weed2all last edited by

                                    Getting back to the main topic, whether or not a Duet will survive reverse polarity input depends on the power supply. The stepper driver output mosfet body diodes are forward biased, so they will conduct the current and clamp the voltage to about 2V because there are two in series. A good power supply will go into hiccup mode when it sees this near short-circuit, which means it will supply short bursts of its maximum current or a little greater, with longer intervals of no current. I have known Duets survive this, with no blown drivers and the fuse remaining intact. A less good power supply may just supply its maximum current continuously.

                                    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

                                    weed2all 1 Reply Last reply Reply Quote 1
                                    • weed2all
                                      weed2all @dc42 last edited by weed2all

                                      @dc42 well in this case didn't survive as a use of cheap clone psu!

                                      https://www.thingiverse.com/weed2all/designs

                                      1 Reply Last reply Reply Quote 0
                                      • zapta
                                        zapta @jens55 last edited by zapta

                                        I avoid Chinese power supplies not because it can damage my duet but because it can damage me, my family, and our home.

                                        If Meanwell (Taiwan) or other reputable manufacturers choose to manufacture in China, but own the process, spec, and certification it's fine with me.

                                        Edit: for high quality Meanwell PSUs, I recommend the UHP series. They are compact, highly efficient, stay cool, and are fanless.

                                        1 Reply Last reply Reply Quote 2
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