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    Fan Problem - Blown Board?

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    • Phaedruxundefined
      Phaedrux Moderator
      last edited by

      Post your full config please.

      Are you saying you blew the fan fuse? It's possible that the MOSFETs for the fans were also damaged. You'd need a good close up look at them, they are by the fan ports.

      See the image here: https://duet3d.dozuki.com/Wiki/Connector_and_spare_part_numbers#Section_Fan_mosfet

      Z-Bot CoreXY Build | Thingiverse Profile

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      • Garyundefined
        Gary
        last edited by Gary

        Just remembered that the fan speed sliders never worked, which is why I thought something was wrong. Hotend fan still working. I think there was something wrong before I blew the fuse as above.

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        • Garyundefined
          Gary
          last edited by Gary

          I'm still commissioning the machine, so most of the config is from my other machine. Main problem is that the WebGUI fan speed sliders have no effect (also M106 no effect). Hotend fan kicks in at 45C. Fan seems slow, but it's hard to tell. (firmware 2.05.1)

          ; Configuration file for Duet WiFi (firmware version 1.21)
          ; executed by the firmware on start-up
          ;
          ; generated by RepRapFirmware Configuration Tool v2 on Tue Feb 26 2019 21:31:01 GMT+0000 (Greenwich Mean Time)
          ;made by Gary 22/07/2020

          ; General preferences
          G21 ; Work in millimetres
          G90 ; Send absolute coordinates...
          M83 ; ...but relative extruder moves
          M552 S1 ; connect to WiFi

          ; Delta Settings
          M665 L440.49 R227 H456.747 B185.0 ; Set delta radius, diagonal rod length, printable radius and homed height
          M666 X0 Y0 Z0 A0.00 B0.00 ; Put your endstop adjustments here, or let auto calibration find them

          ; Network
          M550 P"P1" ; Set machine name
          M551 P""
          M552 P192.168.0.16 ; Set password
          ;M552 P0.0.0.0 S1 ; Enable network and acquire dynamic address via DHCP
          M586 P0 S1 ; Enable HTTP
          M586 P1 S0 ; Disable FTP
          M586 P2 S0 ; Disable Telnet

          ; Drives
          M569 P0 S0 ; Drive 0 goes forwards
          M569 P1 S0 ; Drive 1 goes forwards
          M569 P2 S0 ; Drive 2 goes forwards
          M569 P3 S0 ; Drive 3 goes forwards (BMG extruder clone - MT-1703HSM168RE 0.9deg step 180917 1.68A)
          M350 X16 Y16 Z16 E16 I1 ; Configure microstepping with interpolation (20teeth pulley) "E3D MT-1704HSM168RE 0.9deg step 190102, 400 steps/rev 1.68A"
          M92 X160.00 Y160.00 Z160.00 E837 ; Set steps per mm
          M566 X1000 Y1000 Z1000 E1000 ; Set maximum instantaneous speed changes (mm/min)
          M203 X12000.00 Y12000.00 Z12000.00 E10000 ; Set maximum speeds (mm/min)
          M201 X3000.00 Y3000.00 Z3000.00 E3000.00 ; Set accelerations (mm/s^2)
          M906 X1000.00 Y1000.00 Z1000.00 E1100.00 I30 ; Set motor currents (mA) and motor idle factor in per cent
          ;M906 X1344.00 Y1344.00 Z1344.00 E1344.00 I30 ; Set motor currents (mA) and motor idle factor in per cent (reduced to 80% of max Amps)
          ;M84 S30 ; Set idle timeout
          M84 S600

          ; Retraction
          M207 S4.0 F5000 R-0.025 T2500 Z0.5 ; Firmware retraction

          ; Axis Limits
          M208 Z0 S1 ; Set minimum Z

          ; Endstops
          M574 X2 Y2 Z2 S1 ; Set active high endstops

          ; Z-Probe (standard AC Predator microswitch probe, clips just under nozzle)
          M558 P4 H25 F120 T6000 ; Set Z probe type to switch(P4) and the dive height + speeds
          G31 P500 X0 Y0 z17.225 ;Z22.446 ;17.249 ;.656 ; Set Z probe trigger value, offset and trigger height
          M557 R115 S20
          ;G29 S1 ; Load the heightmap

          ; Heaters
          M307 H0 A137.8 C533.3 D1.5 V24.3 B0 ; Disable bang-bang mode for the bed heater and set PWM limit
          M305 P0 T100000 B4300 C0 R4700 ; Set thermistor + ADC parameters for heater 0
          M143 H0 S120 ; Set temperature limit for heater 0 to 120C
          M305 P1 T100000 B4300 C0 R4700 ; Set thermistor + ADC parameters for heater 1
          M143 H1 S240 ; Set temperature limit for heater 1 to 240C

          ; Fans
          M106 P0 S0 I0 F500 H-1 ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned off
          M106 P1 S1 I0 F500 H1 T45 ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned on

          ; Tools for p0
          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

          ; Automatic saving after power loss is not enabled

          ; Custom settings are not configured
          M572 D0 S0.1 ; Pressure Advance
          ;M591 D0 P2 C4 S1 ; Activate filament sensor
          M404 N1.75 ; Set for print monitor
          M592 D0 A0.07772 B-0.00029 ; Nonlinear extrusion. Set parameters for extruder drive 0

          ; Miscellaneous
          T0 ;select tool 0 gary added
          M501 ; Load saved parameters from non-volatile memory

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

            @Gary said in Fan Problem - Blown Board?:

            M563 P0 D0 H1 ; Define tool 0

            Your tool doesn't have a fan assigned to it. Add F0

            Are you saying that M106 P0 S1 doesn't turn on the fan connected to fan0 port?

            If your hotend fan seems slower that makes me wonder if you have the fan voltage select jumper pin set to 5v instead of Vin or something.

            Z-Bot CoreXY Build | Thingiverse Profile

            Garyundefined 1 Reply Last reply Reply Quote 0
            • Garyundefined
              Gary @Phaedrux
              last edited by Gary

              @Phaedrux M563 P0 D0 H1 Same as my other machine which works and dozuki says you can omit for tool0. Added F0 and rebooted - no change. M106 P0 S1 does not turn the fan on. Vin jumper selected as in working machine. I cannot figure it out. Thanks for trying to help. Strange that heatsink fan starts when over 45C, but WebGUI hs no effect on it either below or above 45C.

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              • Phaedruxundefined
                Phaedrux Moderator
                last edited by

                Does the MOSFET look blown?

                Z-Bot CoreXY Build | Thingiverse Profile

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                • Garyundefined
                  Gary @Phaedrux
                  last edited by

                  @Phaedrux MOSFETs look okay. Do you know if the WebGUI fan speed slider issues the M106 command?

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                  • Phaedruxundefined
                    Phaedrux Moderator
                    last edited by

                    Yes the slider is the same as sensing m106.

                    Z-Bot CoreXY Build | Thingiverse Profile

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                    • Garyundefined
                      Gary @Phaedrux
                      last edited by Gary

                      @Phaedrux I've taken molex off fan header connections and attached direct to 24v. All fans/wiring okay. My mistake about speed - it's just a quiet - ish fan.

                      That's maybe something if m106 and the sliders have no effect?

                      send M106 P1 H-1 and heatsink fan comes on. No change to WebGUI controls
                      M106 P1 S0 fan stops (WebGUI speed sliders - no effect)
                      M106 P1 S1 fan on (WebGUI speed sliders - no effect)
                      M106 P0 S1 no change to part cooling fan - still off

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                      • Garyundefined
                        Gary @Phaedrux
                        last edited by Gary

                        @Phaedrux Tried the following:
                        fan0 Molex into fan2 header
                        config.g changes
                        ;Fans
                        ; M106 P0 S0 I0 F500 H-1 ; Disable FAN0: Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned off
                        M106 P2 S0 I0 F500 H-1 ; Set fan 2 value, PWM signal inversion and frequency. Thermostatic control is turned off

                        ;Tools for p0
                        ; M563 P0 D0 H1 F0
                        M563 P0 D0 H1 F2

                        It seems to work!

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                        • Phaedruxundefined
                          Phaedrux Moderator
                          last edited by

                          It sounds like the Fan0 mosfet got damaged when the fuse was blown.

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                          • Garyundefined
                            Gary @Phaedrux
                            last edited by

                            @Phaedrux Yeah. Nothing physically obvious. What also confused me was the 2 Fans on the WebGUI. I didn't notice that one was Tool Fan and the other Fan 0, which are the same. I thought one was the heatsink fan, which thinking about it now wouldn't make sense as it's not speed controllable. Thanks for your help.

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                            • Phaedruxundefined
                              Phaedrux Moderator
                              last edited by

                              You can post a close up high res well lit clear photo of the fan port area so we can see if there is any damage.

                              Z-Bot CoreXY Build | Thingiverse Profile

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                              • Garyundefined
                                Gary @Phaedrux
                                last edited by Gary

                                @Phaedrux Hope it's clear enough.
                                ![0_1597559615949_20200816_072939.jpg](Uploading 100%)
                                Getting:
                                Error

                                Input file contains unsupported image format

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                                • Phaedruxundefined
                                  Phaedrux Moderator
                                  last edited by

                                  Can you try putting the photo on dropbox or google drive or something like that?

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                                  • Garyundefined
                                    Gary @Phaedrux
                                    last edited by

                                    @Phaedrux 20200816_072939.png

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                                    • Phaedruxundefined
                                      Phaedrux Moderator
                                      last edited by

                                      Nothing really visible, but it may still have failed.

                                      Z-Bot CoreXY Build | Thingiverse Profile

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                                      • A Former User?
                                        A Former User
                                        last edited by

                                        if you have a multimeter putting "multimeter mosfet" into google will show you how to test the mosfet properly its a little involved so doesn't make sense to repeat what google can tell you

                                        Garyundefined 1 Reply Last reply Reply Quote 0
                                        • Garyundefined
                                          Gary @A Former User
                                          last edited by Gary

                                          @bearer Thanks I will check as I have now visually blown P3. Also P1 stopped working. So all 3 now not working! Is there anywhere in the UK that I can send the board to get it fixed?

                                          (I bought pre-wired connectors, but I didn't see that although the connectors were compatible at the hot end the polarity was reversed to the fan. I wouldn't have thought that switching the fan polarity would have blown anything - the fans would just spin the wrong way).

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

                                            @Gary said in Fan Problem - Blown Board?:

                                            @bearer Thanks I will check as I have now visually blown P3. Also P1 stopped working. So all 3 now not working! Is there anywhere in the UK that I can send the board to get it fixed?

                                            Send me a PM, I can replace the mosfets.

                                            (I bought pre-wired connectors, but I didn't see that although compatible at the hot end the polarity was reversed to the fan. I wouldn't have thought that switching the fan polarity would have blown anything - the fans would just spin the wrong way).

                                            Unfortunately, brushless DC fans don't work like that. A few types just don't work when connected the wrong way round, but most of them present a short-circuit.

                                            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

                                            Garyundefined 1 Reply Last reply Reply Quote 1
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