Duet3D Logo Duet3D
    • Tags
    • Documentation
    • Order
    • Register
    • Login

    short circuit on out 2, or maybe bad heater.

    Scheduled Pinned Locked Moved
    General Discussion
    4
    17
    614
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • Selivundefined
      Seliv
      last edited by

      Hi ; )
      there was a strange thing today on the duet 3 related to going on out 2 on the motherboard. I have idex with extruder heater X on out 1 and U on out 2.
      when i was doing the G29 the printer suddenly shut down.

      when the wires are plugged in, the motherboard will not turn on, but only the LED flashes every few seconds.

      when i disconnected out 2 everything starts working. I switched it off in place of out 3 (here I have the bed heating by ssr), everything also works, the same change of ssr on the spot to out 2.

      if the heater makes a short circuit, should it not work on each input? I don't know what to think about it, or replace the entire heater that works in a different input, or is it something wrong with the motherboard.

      A Former User? 1 Reply Last reply Reply Quote 0
      • Phaedruxundefined
        Phaedrux Moderator
        last edited by

        Which LEDs are lit on the board? The diag light blinking is normal.

        How do you have things wired exactly? Photo?

        Z-Bot CoreXY Build | Thingiverse Profile

        1 Reply Last reply Reply Quote 0
        • A Former User?
          A Former User @Seliv
          last edited by

          @Seliv said in short circuit on out 2, or maybe bad heater.:

          if the heater makes a short circuit, should it not work on each input?

          If it overloads the mosfet onethe output the mosfet could fail and be always on; and then the power supply overload protection would kick in immediately when the heater that is shorted is connected resulting in power LEDs flashing on and off.

          1 Reply Last reply Reply Quote 0
          • Selivundefined
            Seliv
            last edited by

            plyta.jpg

            Blinking the blue diode on bottom of the motherboard, and green from power supply. From diagram I can see its led_v_fused. when Im changing it to Out 3 is working O.o I dont know, maybe change the heater to new, but dont have 50W at this moment in home šŸ˜›

            A Former User? 1 Reply Last reply Reply Quote 0
            • A Former User?
              A Former User @Seliv
              last edited by

              @Seliv said in short circuit on out 2, or maybe bad heater.:

              Blinking the blue diode

              That is the Vin led, so if disconnecting the heater resolves the blinking both the mosfet on the output and the heater have failed unfortunately.

              1 Reply Last reply Reply Quote 0
              • Selivundefined
                Seliv
                last edited by

                so it's best not to use this input now, switch the bed with ssr to Out 0, and leave Out 2 empty? Its a new board, maybe 2 months 😜

                1 Reply Last reply Reply Quote 0
                • Selivundefined
                  Seliv
                  last edited by

                  in fact, when I plugged in the first heater, it heats up immediately and cannot be stopped. So 100% mosfet ahh

                  1 Reply Last reply Reply Quote 0
                  • A Former User?
                    A Former User
                    last edited by

                    you could remove the sd card or disconnect the ribbon cable to a raspberry pi to rule out config issues but sounds like something has given up the magic smoke.

                    1 Reply Last reply Reply Quote 0
                    • Selivundefined
                      Seliv
                      last edited by

                      @bearer said in short circuit on out 2, or maybe bad heater.:

                      you could remove the sd card or disconnect the ribbon cable to a raspberry pi to rule out config issues but sounds like something has given up the magic smoke.

                      Im using it without pi, ohh god so what can I do now? ;/ all the time red light is on, as if he wanted to heat all the time.

                      1 Reply Last reply Reply Quote 0
                      • Phaedruxundefined
                        Phaedrux Moderator
                        last edited by

                        so you've removed the SD card from the Duet and the heater still powers on as soon as power is applied?

                        Z-Bot CoreXY Build | Thingiverse Profile

                        1 Reply Last reply Reply Quote 0
                        • Selivundefined
                          Seliv
                          last edited by

                          I unplugged all the cables and left only the power to verify. Outs 2 and 3 are burning all the time: / I'm guessing there must have been a short circuit and they went down. Is there any chance of rescue? e.g. get what I need to solder so that I can pass it to an electrician and take care of it?

                          photo 4.jpg

                          if it wasn't for the fact that it is an IDEX motherboard, I didn't really have any problem, but it is for a double X drive and I am already having a problem. šŸ˜•

                          1 Reply Last reply Reply Quote 0
                          • Tim N.undefined
                            Tim N.
                            last edited by Tim N.

                            I also think that the MOSFETs are broken. If your solder skills are not to bad and you have an N-Channel MOSFET with specs like 40V 20A lying around, then even a non SMD type will fit onto the pads (without the large surface of the MOS). You dont even need an additional heatsink if your R_ds_on is not to large. I would recommend less than 50mΩ.

                            I had an issue with a short circuit in a heater (or between two), causing similar problems. I fixed a board like described - and works again perfect!
                            Downloading the Schematics (if you have KiCAD) will help if you are unsure about which Mosfet belongs to which output. But here it seems obvious.
                            Good luck!

                            Duet 2 Wifi on Ender 3 (2019) // Duet 2 Wifi on Tronxy X5SA-500 Pro // (shared Printer: Duet 2 Wifi on Flash forge creator Pro)

                            1 Reply Last reply Reply Quote 0
                            • Selivundefined
                              Seliv
                              last edited by

                              Im trying to find a good mosfet in Poland, but I cant. I only see a large one just like it: https://allegro.pl/oferta/atp216-tl-h-n-channel-power-mosfet-50v-35a-23m-5910866100

                              its a good one?

                              1 Reply Last reply Reply Quote 0
                              • Phaedruxundefined
                                Phaedrux Moderator
                                last edited by

                                Do you see any damage to chips on the board? Can you get a good quality photo?

                                Z-Bot CoreXY Build | Thingiverse Profile

                                1 Reply Last reply Reply Quote 0
                                • Selivundefined
                                  Seliv
                                  last edited by

                                  yea sure. I didnt see any damage, all mosfets on motherboard and other connectors are good for me.

                                  photo 8-min.jpg photo 9.jpg photo 10.jpg

                                  1 Reply Last reply Reply Quote 0
                                  • A Former User?
                                    A Former User
                                    last edited by A Former User

                                    Don't need kicad, only pdf and interactive html BOM for the duet 3 on the duet3d github so far

                                    Selivundefined 1 Reply Last reply Reply Quote 0
                                    • Selivundefined
                                      Seliv @A Former User
                                      last edited by

                                      @bearer so what I can see from this documents, its AOD4184A for mosfet for out1-3. I need to change it, and it will work, probably... 😜

                                      1 Reply Last reply Reply Quote 0
                                      • First post
                                        Last post
                                      Unless otherwise noted, all forum content is licensed under CC-BY-SA