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    Attempt to move motors when VIN is not in range DWC shows 0.5V

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    Duet Hardware and wiring
    vin not in range
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    • Vetiundefined
      Veti
      last edited by

      check the fuses if it is blown

      Magnusjenundefined 1 Reply Last reply Reply Quote 0
      • Magnusjenundefined
        Magnusjen @Veti
        last edited by

        @veti I just checked the fuses with my multimeter, they all read 24 V

        1 Reply Last reply Reply Quote 0
        • Vetiundefined
          Veti
          last edited by

          you measure a fuse by measuring the resistance across it while its out of the socket.

          Magnusjenundefined 2 Replies Last reply Reply Quote 0
          • Magnusjenundefined
            Magnusjen @Veti
            last edited by Magnusjen

            @veti Huh? But then there is no current to the fuse?

            Edit: doh... ignore this

            Danalundefined 1 Reply Last reply Reply Quote 0
            • Magnusjenundefined
              Magnusjen @Veti
              last edited by

              @veti Sorry mate, my bad... I took them out and checked them one by one and they are all fine.

              Danalundefined 1 Reply Last reply Reply Quote 0
              • Danalundefined
                Danal @Magnusjen
                last edited by

                @magnusjen said in Attempt to move motors when VIN is not in range:

                @veti Huh? But then there is no current to the fuse?

                Correct. Measure resistance, not voltage or current. Should be zero for a good fuse.

                In fact, measuring 24V across a fuse that is IN CIRCUIT is a strong hint that the fuse is "blown". Meaning open. Meaning no current able to pass through. If you think about a good fuse IN CIRCUIT, it should read very, very, very close to zero V 'across' the fuse, because a good fuse is not 'blocking' anything, i.e. not blown. So the 'voltage drop' across the fuse is (almost) nothing.

                Delta / Kossel printer fanatic

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                • Danalundefined
                  Danal @Magnusjen
                  last edited by Danal

                  @magnusjen said in Attempt to move motors when VIN is not in range:

                  @veti Sorry mate, my bad... I took them out and checked them one by one and they are all fine.

                  "Good" as in "Zero Ohms"? (When out of circuit)

                  Delta / Kossel printer fanatic

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                  • Magnusjenundefined
                    Magnusjen @Danal
                    last edited by

                    @danal Was to slow, I took them out and looked at resistance across and they all hit zero

                    Danalundefined 1 Reply Last reply Reply Quote 0
                    • Danalundefined
                      Danal @Magnusjen
                      last edited by

                      @magnusjen said in Attempt to move motors when VIN is not in range:

                      @danal Was to slow, I took them out and looked at resistance across and they all hit zero

                      Perfect... then they are OK.

                      Hmmm.... DWC still shows just 5V?

                      Delta / Kossel printer fanatic

                      Magnusjenundefined 1 Reply Last reply Reply Quote 0
                      • Magnusjenundefined
                        Magnusjen @Danal
                        last edited by

                        @danal Yes still shows 5V, I even pulled out the fans just for ease of work with the board.

                        Danalundefined 1 Reply Last reply Reply Quote 0
                        • Danalundefined
                          Danal @Magnusjen
                          last edited by

                          @magnusjen said in Attempt to move motors when VIN is not in range:

                          @danal Yes still shows 5V, I even pulled out the fans just for ease of work with the board.

                          With USB UNPLUGGED, and 24V reading across the pins on the green connector that is circled, which lights are on?

                          0_1552492303271_dfc8a2f0-2797-4e7b-8232-174853ffa40d-image.png

                          Delta / Kossel printer fanatic

                          Magnusjenundefined 1 Reply Last reply Reply Quote 0
                          • Magnusjenundefined
                            Magnusjen @Danal
                            last edited by

                            @danal
                            Power in is in the correct spot Check
                            Power reading across reads as 24V check
                            USB not plugged in Check
                            Wifi Blue light check
                            3.3V green light check
                            5V red light check
                            VIN blue light check
                            Z,Y, X stop red lights check

                            1 Reply Last reply Reply Quote 0
                            • Danalundefined
                              Danal
                              last edited by

                              Interesting....

                              Just as a final check of inputs and fuses, take a VOLTAGE reading across the two red circles (heater E0 VIN and ground on the big green VIN itself), with USB unplugged and 24V in on.

                              Should read 24V. Probably will. Still, with that confirmation, we can move on.

                              0_1552492985411_Check VIN.PNG

                              Delta / Kossel printer fanatic

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                              • Magnusjenundefined
                                Magnusjen @Danal
                                last edited by

                                @danal Reads 24V indeed mate 😕

                                I really appreciates the help! It happend quite sudden, I had the motors working and homed and when I had been working on wiring the fans (with the board turned off) it started with that error.

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                                • Danalundefined
                                  Danal
                                  last edited by Danal

                                  EDIT: My memory failed me. I've removed the illustration so as not to lead anyone astray.

                                  The three pin connector nearest the big green VIN power in screw terminals should be blank.

                                  Delta / Kossel printer fanatic

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                                  • Magnusjenundefined
                                    Magnusjen @Danal
                                    last edited by

                                    @danal jumper??? There never was a jumper there on my board.

                                    Danalundefined 1 Reply Last reply Reply Quote 0
                                    • Danalundefined
                                      Danal @Magnusjen
                                      last edited by

                                      @magnusjen said in Attempt to move motors when VIN is not in range:

                                      @danal jumper??? There never was a jumper there on my board.

                                      Yeah, just realized, I was thinking of a different jumper. They are correct the way you describe, empty.

                                      Delta / Kossel printer fanatic

                                      Magnusjenundefined 1 Reply Last reply Reply Quote 0
                                      • Magnusjenundefined
                                        Magnusjen @Danal
                                        last edited by

                                        @danal Good timing, I was just about to put one on hehe

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                                        • Danalundefined
                                          Danal
                                          last edited by

                                          Summary:

                                          • 3.3V is good, or you couldn't talk to the board (WiFi, CPU, etc, would be dead).

                                          We've verified with lights and voltage readings that :

                                          • VIN is good
                                          • Fuses are good
                                          • VIN is getting to various points around the board.

                                          Which means I'm stumped as to why DWC is saying "insufficient voltage". If I think of anything, I will post, and meanwhile the Duet/Escher guys will be online in a few hours.

                                          Delta / Kossel printer fanatic

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                                          • Magnusjenundefined
                                            Magnusjen @Danal
                                            last edited by

                                            @danal Thanks for the help so far bud! I will go and run some errands while I wait for them to be online.. I am stumped myself, but I am happy this forum exists! I really want the board to work it seems so great.

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