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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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    • 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.

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

        Just a random update, to those following along.. I checked the voltage from the PWN in (which comes in at 24V still) against the heatbed, the heatbed also says 24V... I checked against an always on fan pin and got a tiny spark... I will just stop checking voltage for a little while.

        The console still shows 5V.. I have tried unplugging everything from the board (why? Why not) and the console still shows 5V. I am going slightly insane here.

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        • Magnusjenundefined
          Magnusjen
          last edited by

          So I noticed something fun... It actually reads as 0.5 V in the web interface, which makes even less sense to me. I haven't touched any of the jumpers, they are the way I got them.

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          • Magnusjenundefined
            Magnusjen
            last edited by

            Status on the Issue
            I am using a DUET 2 WIFI 1.03 with newest firmware (non-beta) - on an Ender 3 pro, the power supply is the Ender 3 Pros. The fans are the Ender 3 stock fans which are all 24V. I used hooked these up to the board, but did several wrong wirings ( I think), I even tried to hook up a 5V fan without changing the jumper nothing happend. After this the motors were still working. I turned the board off and tried to rewire the fans that did not work, the next day I turn the board on and I get the error and DWC showing 0.5 V.

            The issue:
            When I try to move the motors it says "Attempt to move motors when VIN is not in range"

            DWC shows 0.5 V in VIN
            I have tested all fuses they show zero ohm
            I have measured power in and it shows 24 V
            I have measured from power to heatbed and it shows 24V
            I have measured from power to hotend and it shows 24V
            Wifi Blue light check
            3.3V green light check
            5V red light check
            VIN blue light check
            Z,Y, X stop red lights check
            I have checked that VIN is tight (it is tight..)
            All jumpers are in "stock" positions

            So... Thats about where we are at... Help me DUET forum, you are my only hope... I just wanna know if it is dead and I have to try again 😞

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

              Just got home from work (will just do continues updates here in the hope that someone will see and have an idea/using it as a log in case someone wants to chim in).

              I have done a "visual" inspection of the board, everything seems to be in order nothing that looks burned or shorted.

              The DWC still reports 0.5 V, but I can activate both hotend and heatbed.. But not my motors. So power is clearly going somewhere but not to the motors.

              I will look into if the fans can work - Ah... there we might have it.. I think I have fried the board at the fans.. I cannot get my fan to work on any position, neither always on or any of the others... Is there a way to confirm this?

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              • Phaedruxundefined
                Phaedrux Moderator @Magnusjen
                last edited by

                @magnusjen said in Attempt to move motors when VIN is not in range DWC shows 0.5V:

                DUET 2 WIFI 1.03

                The 1.03 boards have a fan fuse near the fan connectors. Check if it is blown.
                https://duet3d.dozuki.com/Wiki/Duet_Wiring_Diagrams

                Z-Bot CoreXY Build | Thingiverse Profile

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

                  @phaedrux I have tested the fuses and the resistance is zero as it should be if it is working.

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                  • genghisnico13undefined
                    genghisnico13
                    last edited by

                    Perhaps you could measure the voltage in the following points, one (or both) are used to measure Vin and you should see close to Vin/11.
                    The pictures may not match your board exactly.

                    1_1552591335864_duet wifi r81_v1.jpg

                    0_1552591335863_duet wifi R16_v1.jpg
                    I don't know which side is GND.

                    Magnusjenundefined 1 Reply Last reply Reply Quote 0
                    • Magnusjenundefined
                      Magnusjen @genghisnico13
                      last edited by

                      @genghisnico13 So, the top picture one is 24V (23.7 is the reading I get all the time but thats 24V) and the one in the lower picture is 23.5 which is odd, I measured it several times to ensure it was correct.

                      genghisnico13undefined 1 Reply Last reply Reply Quote 0
                      • genghisnico13undefined
                        genghisnico13 @Magnusjen
                        last edited by

                        @magnusjen Interesting I would like to see what @dc42 has to say about it, but if I am not mistaken that doesn't look good at all.

                        Magnusjenundefined 1 Reply Last reply Reply Quote 0
                        • Magnusjenundefined
                          Magnusjen @genghisnico13
                          last edited by

                          @genghisnico13 Yeah... I have lost hope, I am just waiting for someone to confirm it is dead.. I will take it as an expensive lesson in basic wiring.

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

                            it can be resoldered see information here:
                            https://duet3d.dozuki.com/Wiki/Connector_and_spare_part_numbers#Section_Fan_mosfet
                            but wait for DCs input

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

                              @veti Well, sounds like I will just wire my old control board up if that is the case and wait for new electronics parts to arrive and the perfect day to sit super calm and solder it on.

                              But good to know there is a fix, I will just wait for DCs comment.

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

                                The voltage reported by DWC (and also in the M122 report) is the VIN voltage after the 7.5A fuse. That supply also feeds the stepper motors, 5V regulator and extruder heaters. A voltage divider with a ratio of 11:1 feeds the ADC input.

                                If the input to the voltage divider is 24V but the DWC reading is only 0.5V then I can see a few possibilities:

                                1. The upper resistor in the voltage divider is not soldered down or is cracked.
                                2. The ADC input pin is shorted to another signal that is close to ground potential.
                                3. The ADC has failed. But in that case I would expect the thermistor readings not to be correct.

                                My gut feeling is that your Duet can be got working again.

                                Does the extruder heater heat up when commanded to do so, despite the VIN reading of 0.5V in DWC and/or M122 ?

                                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

                                elmoretundefined Magnusjenundefined 2 Replies Last reply Reply Quote 0
                                • elmoretundefined
                                  elmoret @dc42
                                  last edited by

                                  @dc42 He has a 1.03, not 1.04.

                                  OP: can you post a photo of your board from above?

                                  tenjinundefined Magnusjenundefined 2 Replies Last reply Reply Quote 0
                                  • tenjinundefined
                                    tenjin @elmoret
                                    last edited by

                                    @elmoret

                                    is it possible this is the same issue the other guy had?

                                    do you have a 10 pin connector hooked up to an LCD?

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

                                      @tenjin Hi there, no I don't have an LCD and I have nothing going into the 10 pin connector.

                                      1 Reply Last reply Reply Quote 0
                                      • Magnusjenundefined
                                        Magnusjen @dc42
                                        last edited by

                                        @dc42 Thanks for replying, you got the situation right, I will upload a picture of my board aswell as another guy commented.

                                        The extruder heater heats up fine, I checked both at the nozzle "to see it was just an IT lie" and DWC reports the heating. I have taken a screenshot of my DWC.

                                        I would be happy if whatever mistake I have made can be corrected, you guys have made an awesome board.

                                        0_1552628048374_2019-03-15.png

                                        I could not also add the picture of my board, I will do it as a reply to the other guy

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

                                          @elmoret Hi there, here is a picture of the board from above, if you guys need it I can unplug everything.

                                          0_1552628177522_2019-03-15 06.27.29-1.jpg
                                          0_1552628198909_2019-03-15 06.27.20.jpg

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

                                            As this is such an unusual fault, and I can't think how it would have been caused by user error, I am happy to approve a warranty replacement if it's a genuine Duet and it was in warranty when the fault was reported. If it was out of warranty then I suggest that the board is sent to our US-based repairer for analysis and possible repair.

                                            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

                                            Magnusjenundefined 1 Reply Last reply Reply Quote 1
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