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    Duet2 Wifi fan runs constantly

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    • cdthomas9undefined
      cdthomas9
      last edited by

      2e5f7958-4dda-478f-bef8-f77d3af983eb-image.png

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      • Vetiundefined
        Veti
        last edited by

        yes that wont work as the buck converter will not be able to work with the pwm pulsing

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        • cdthomas9undefined
          cdthomas9
          last edited by

          Ah, gotcha. Thanks, I'll rewire it then.

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          • cdthomas9undefined
            cdthomas9
            last edited by

            OK, so after rewiring things so that the buck converter is feeding into VFAN, fan1 still runs constantly. I even commented out all of the fan lines in my config.g. Right now I am trying fan0 and fan2, but neither seem to be working. The always on pins and fan1 both get 12v constantly, and fan1 and fan2 don't get anything, even when trying to turn on manually or if I heat up the hot ends.

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            • Phaedruxundefined
              Phaedrux Moderator
              last edited by

              Post a photo of the current wiring and your current config.g

              Z-Bot CoreXY Build | Thingiverse Profile

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              • cdthomas9undefined
                cdthomas9
                last edited by

                ; General preferences
                M111 S0																	; Debugging off
                G21																		; Work in millimetres
                G90																		; Send absolute coordinates...
                M83																		; ...but relative extruder moves
                M555 P2																	; Set firmware compatibility to look like Marlin
                M208 X-7 Y0 Z0 S1														; Set axis minima 
                M208 X252 Y153 Z155 S0													; Set axis maxima (reduced by offset above)
                
                ; Enable Panel Due Connector
                M575 P1 S1 B57600														; Enables connector and sets baud rate
                
                ; Endstops
                M574 X1 S1 P"!xstop"													; X min active high endstop switch
                M574 Y1 S1 P"!ystop"													; Y min active high endstop switch
                
                ;Manual Bed Leveling
                M558 P9 C"^zprobe.in" H5 F500 T4000 X0 Y0 Z1							; Set Z probe type/mode 9. H=Dive Height. F=Speed the bed moves
                G31 P25 X-36 Y0 Z2.885													; Z probe trigger value, offset in relation to nozzle. And trigger height adjustment
                M557 X40:190 Y20:145 S20												; Define mesh grid
                ;M671 x144:94:191 Y10:160:160 P0.5 										; Manual screw adjustment locations 
                
                ; Drives
                M569 P0 S1																; Drive 0 goes backwards
                M569 P1 S1																; Drive 1 goes backwards
                M569 P2 S0																; Drive 2 goes forwards
                M569 P3 S0																; Drive 3 goes forwards
                M569 P4 S1																; Drive 4 goes backwards
                M350 X16 Y16 Z16 E16 I1													; Configure microstepping with interpolation
                M92 X88.573186 Y88.573186 Z400 E96.27520187033366						; Set steps per mm
                M566 X900 Y900 Z300 E1200												; Set maximum instantaneous speed changes (mm/min)
                M203 X1080000 Y1080000 Z600 E96000										; Set maximum speeds (mm/min)
                M201 X1000 Y1000 Z100 E2000												; Set accelerations (mm/s^2)
                M906 X800 Y800 Z400 E800 I30											; Set motor currents (mA) and motor idle factor in per cent
                M84 S30 																; Set idle timeout
                M584 X0 Y1 Z2 E3:4														; Set drive assignments
                
                ; Heaters
                M140 H0
                M143 S260																; Set maximum heater temperature to 260C
                M308 S0 P"bed_temp" Y"thermistor" T100000 B3974 C0 R4700				; Set thermistor + ADC parameters for heater 0
                M308 S1 P"e0_temp" Y"thermistor" T100000 B4725 C7.060000e-8 R4700		; Set thermistor + ADC parameters for heater 1
                M308 S2 P"e1_temp" Y"thermistor" T100000 B4725 C7.060000e-8 R4700		; Set thermistor + ADC parameters for heater 2
                M950 H0 C"bed_heat" T0													; heater 0 uses the bed_heat pin, sensor 0
                M950 H1 C"e0_heat" T1													; heater 1 uses the e0_heat pin and sensor 1
                M950 H2 C"e1_heat" T2													; heater 2 uses the e1_heat pin and sensor 2
                M307 H0 A103.7 C787.7 D1.0 S1.00 B0
                ;M307 H0 A38.5 C41.1 D1.4 V24.4 B0										; Set PID values for Heatedbed - derived from autotune
                M307 H1 A250.2 C139.5 D5.4 V24.4 B0										; Set PID values for Extruder 1 - derived from autotune
                M307 H2 A387.6 C209.9 D5.9 V24.4 B0										; Set PID values for Extruder 2 - derived from autotune
                M307 H3 A-1 C-1 D-1														; Disable the 4th Heater to free up PWM channel on the Duex board.
                
                ; Tools
                M563 P0 D0 H1															; Define tool 0
                G10 P0 X0 Y0 Z0															; Set tool 0 axis offsets
                G10 P0 R0 S0															; Set initial tool 0 active and standby temperatures to 0C
                M563 P1 D1 H2															; Define tool 1
                G10 P1 X34 Y0 Z0														; Set tool 1 axis offsets
                G10 P1 R0 S0															; Set initial tool 1 active and standby temperatures to 0C
                M207 S1.2 F1200															; Set 1.2mm retract distance for G10 command
                
                ; Network
                M550 P"Rep2X-EnStein"													; Set machine name
                M552 S1																	; Enable network
                M586 P0 S1																; Enable HTTP
                M586 P1 S1																; Enable FTP
                M586 P2 S0																; Disable Telnet
                
                ; Fans
                M950 F0 C"fan0" Q500													; Set fan 0 value, PWM signal inversion and frequency.
                M950 F1 C"fan2" Q500													; Set fan 1 value, PWM signal inversion and frequency.
                M106 P0 T40:50 H1														; Set fan 0. Thermostatic control is turned on
                M106 P1 T40:50 H2														; Set fan 1. Thermostatic control is turned on
                M950 S0 C"exp.heater3"													; Define BLTouch probe
                
                
                M564 H0 ; Allow Movement while axes are NOT homed
                

                PXL_20210129_233705226.jpg !

                PXL_20210129_233659621.jpg

                PXL_20210129_233647740.jpg

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                • cdthomas9undefined
                  cdthomas9
                  last edited by

                  PXL_20210129_233659621.jpg

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                  • Phaedruxundefined
                    Phaedrux Moderator
                    last edited by

                    I fear that you may have fried a mosfet or something with the previous wiring setup so that Fan1 is failed in the on position.

                    Connect a fan to the Fan1 port
                    Send M950 F1 C"fan1" followed by M106 P1 S1 and M106 P1 S0

                    is it able to control the fan?

                    Z-Bot CoreXY Build | Thingiverse Profile

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                    • cdthomas9undefined
                      cdthomas9
                      last edited by cdthomas9

                      No joy on that, I also tried this for fan2 as well, no control for any fan PWM channel it seems. I haven't had this board long at all either.

                      fcwiltundefined 1 Reply Last reply Reply Quote 0
                      • fcwiltundefined
                        fcwilt @cdthomas9
                        last edited by

                        @cdthomas9 said in Duet2 Wifi fan runs constantly:

                        No joy on that, I also tried this for fan2 as well, no control for any fan PWM channel it seems. I haven't had this board long at all either.

                        Well if you had both convertors connected and applied power you may have fried both fan mosfets.

                        Frederick

                        Printers: a E3D MS/TC setup and a RatRig Hybrid. Using Duet 3 hardware running 3.4.6

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                        • cdthomas9undefined
                          cdthomas9
                          last edited by

                          Why would that happen? Do they draw too much current? Just operating a fan?

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                          • cdthomas9undefined
                            cdthomas9
                            last edited by

                            And if that's what happened how can I fix it?

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                            • fcwiltundefined
                              fcwilt @cdthomas9
                              last edited by fcwilt

                              @cdthomas9 said in Duet2 Wifi fan runs constantly:

                              Why would that happen? Do they draw too much current? Just operating a fan?

                              I don't know that specifics of your convertor so I cannot be sure.

                              I once connected a small incandescent bulb to a fan output. It's rated current was well within the capabilities of the fan output.

                              What I didn't account for was the large inrush current that is a characteristic of a cold incandescent bulbs. That inrush was enough to instantly destroy the MOSFET driving the fan output.

                              Perhaps your convertor also has a large inrush current.

                              Frederick

                              Printers: a E3D MS/TC setup and a RatRig Hybrid. Using Duet 3 hardware running 3.4.6

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                              • cdthomas9undefined
                                cdthomas9
                                last edited by

                                Ah, yeah that makes sense. I wasn't thinking about that, that's probably exactly what happened, thanks.

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                                • Phaedruxundefined
                                  Phaedrux Moderator @cdthomas9
                                  last edited by

                                  @cdthomas9 said in Duet2 Wifi fan runs constantly:

                                  Why would that happen? Do they draw too much current? Just operating a fan?

                                  I'm not savvy enough to answer that either. But at least it failed ON and instead of OFF. Could be used as the hotend heatsink fan at least.

                                  The mosfets can be replaced if you have the tools and skills.

                                  https://duet3d.dozuki.com/Wiki/Connector_and_spare_part_numbers#Section_Fan_mosfet

                                  Z-Bot CoreXY Build | Thingiverse Profile

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                                  • cdthomas9undefined
                                    cdthomas9
                                    last edited by

                                    Thanks, I'm going to order a new board, and the parts to try to fix this one. I have the tools needed but I've never done any SMD work so this will be a learning experience 😬

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                                    • Phaedruxundefined
                                      Phaedrux Moderator
                                      last edited by

                                      Good luck! If you do a search in the forum you can probably find some good threads for tips.

                                      Z-Bot CoreXY Build | Thingiverse Profile

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                                      • Vetiundefined
                                        Veti
                                        last edited by Veti

                                        @cdthomas9 said in Duet2 Wifi fan runs constantly:

                                        Thanks, I'm going to order a new board,

                                        if you are ordering a new board. consider the mini 5 or duet 3

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                                        • cdthomas9undefined
                                          cdthomas9
                                          last edited by

                                          I had already ordered a replacement Duet2. The 3 seems overkill for this little printer, and I hadn't even considered the Mini 5, I actually had never read anything about that board at all. I would go for it but no one sells it.

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