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    Mini Duet 5+ - Part fan runs continuously

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    My Duet controlled machine
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    • T3P3Tonyundefined
      T3P3Tony administrators @PaulHew
      last edited by

      @paulhew ok yes 0.1A '24V for both together is fine. I see its a 0.5 board and we did have some issues with mosfet soldering on those boards so it could be that (although odd it was working before).

      www.duet3d.com

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

        @t3p3tony I do not mind sending it back and paying for it to be fixed.
        Not one for messing people around. I agree it was working, so no dispute there hence why I am offering to pay.

        I have heard of mosfet's during my time on the forum, do not know what one looks like.

        It did get hot in that little chamber so am going to go through the wiring to make sure all is good. It was hot enough to shrink the heat shrink cable labels near the extruder!

        Appreciate the help as usual gents.
        Regards,
        Paul.

        RailCore II - Duet Mini + 1LC, Voron V0.1 - Duet Mini
        Voron 2.4 disassembled..... Waiting for the RailCore Mini....

        T3P3Tonyundefined 1 Reply Last reply Reply Quote 0
        • T3P3Tonyundefined
          T3P3Tony administrators @PaulHew
          last edited by

          @paulhew drop me a line tony@duet3d.com and we can take it from there.

          www.duet3d.com

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

            @t3p3tony Sorry to intrude, but does the Driver 0 TMC2209 look odd to you? Looking at 2 separate photos, the text line above GERMANY looks odd on that one driver.

            droftartsundefined 1 Reply Last reply Reply Quote 0
            • droftartsundefined
              droftarts administrators @NexxCat
              last edited by

              @nexxcat Yes, there does look like there's a hole burnt into it. @PaulHew does Driver 0 work okay? Is that where the extruder motor is connected?

              b3b4a43e-2b2b-4bf0-9068-6f38e6cc6061-image.png

              Ian

              Bed-slinger - Mini5+ WiFi/1LC | RRP Fisher v1 - D2 WiFi | Polargraph - D2 WiFi | TronXY X5S - 6HC/Roto | CNC router - 6HC | Tractus3D T1250 - D2 Eth

              PaulHewundefined 1 Reply Last reply Reply Quote 2
              • PaulHewundefined
                PaulHew @droftarts
                last edited by

                @droftarts x and y are on 0 and 1, z on 3 e, on 4.

                I will have another look later when I am back.

                RailCore II - Duet Mini + 1LC, Voron V0.1 - Duet Mini
                Voron 2.4 disassembled..... Waiting for the RailCore Mini....

                PaulHewundefined 1 Reply Last reply Reply Quote 0
                • PaulHewundefined
                  PaulHew @PaulHew
                  last edited by

                  @paulhew it homed alright this morning.

                  RailCore II - Duet Mini + 1LC, Voron V0.1 - Duet Mini
                  Voron 2.4 disassembled..... Waiting for the RailCore Mini....

                  PaulHewundefined 1 Reply Last reply Reply Quote 0
                  • PaulHewundefined
                    PaulHew @PaulHew
                    last edited by

                    @paulhew 20210518_205601.jpg
                    As close I can get to driver0

                    Homing is fine and believe it or not it still extrudes!

                    RailCore II - Duet Mini + 1LC, Voron V0.1 - Duet Mini
                    Voron 2.4 disassembled..... Waiting for the RailCore Mini....

                    1 Reply Last reply Reply Quote 0
                    • PaulHewundefined
                      PaulHew
                      last edited by PaulHew

                      Update....
                      I took the time last night to remove the Mini 5 from my printer so I can send to Tony. Thanks @T3P3Tony
                      Whilst at it I checked the fan cabling and found a melt spot on one of the cables. There was also a mark on the brass where i realize now it had shorted, me being inquisitive wiped it to see what it was!
                      20210521_085543.jpg

                      As per the LDO part number and spec sheet which is above in this thread, 800ma is way too much for this little motor, even though they say it is rated for 1amp
                      The motor was that hot it burnt my fingers when checking the issue, in turn had heated the brass standoffs which then melted the sheath of the fan cable that was resting on the brass. (The whole lot is in a chamber)
                      Also you can see the heat shrink has been shrunk by the extreme heat. I put them on loose!

                      All the printers I have built and used the 80% rule, i have never had this.

                      However lesson learnt, replace chinese cable with silicone or use a protective braid.

                      For those who think I did not RTFM, I did and always do! 😉 Hence how I got into this mess! 🤣

                      RailCore II - Duet Mini + 1LC, Voron V0.1 - Duet Mini
                      Voron 2.4 disassembled..... Waiting for the RailCore Mini....

                      T3P3Tonyundefined 1 Reply Last reply Reply Quote 2
                      • T3P3Tonyundefined
                        T3P3Tony administrators @PaulHew
                        last edited by

                        @paulhew Thanks for the update. I think its likely that the melting + short fried the Out3 mosfet but will take a look when I get your board. The stepper driver "black spot" though 🤔 we will see!

                        www.duet3d.com

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

                          @t3p3tony Thank you for fixing my board, really do appreciate it.
                          Can start my tuning now and convert 'Voron' macros to work with RRF.

                          Thanks again
                          P.

                          RailCore II - Duet Mini + 1LC, Voron V0.1 - Duet Mini
                          Voron 2.4 disassembled..... Waiting for the RailCore Mini....

                          1 Reply Last reply Reply Quote 0
                          • PaulHewundefined
                            PaulHew
                            last edited by

                            Finishing Touch..... Love the new Duet Labels
                            20210531_130225.jpg

                            RailCore II - Duet Mini + 1LC, Voron V0.1 - Duet Mini
                            Voron 2.4 disassembled..... Waiting for the RailCore Mini....

                            1 Reply Last reply Reply Quote 1
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