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    Heater 0 and Heater 1 reading 2000°C

    Duet Hardware and wiring
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    • Bakak
      Bakak last edited by

      I have a Delta with two Smart effectors. After changing my effector BOTH, bed and hotend started reading 2000°C. I did not change any wireing or configuration. If it only was the hotend, it culd be a broken wire, but the fact that tne bed ALSO reads 2000°C makes me suspicious... I also tried connecting the hotend thermistor to the second channel, same here.

      Did my duet just break?

      1 Reply Last reply Reply Quote 0
      • CaiJonas
        CaiJonas last edited by

        Funny, I have excactly the same Problem. It is a brand new duet WiFi 2 with external antenna. Everything works perfekt but not the temp reading. It also Shows 2000 on both channels. Here is my config:

        M308 S0 P"bedtemp" Y"thermistor" T100000 B4138 ; configure sensor 0 as thermistor on pin bedtemp
        M950 H0 C"bedheat" T0 ; create bed heater output on bedheat and map it to sensor 0
        M143 H0 S120 ; set temperature limit for heater 0 to 120C
        M307 H0 B1 S1.00 ; enable bang-bang mode for the bed heater and set PWM limit
        M140 H0 ; map heated bed to heater 0
        M308 S1 P"e0temp" Y"thermistor" T100000 B4138 ; configure sensor 1 as thermistor on pin e0temp
        M950 H1 C"e0heat" T1 ; create nozzle heater output on !e0heat and map it to sensor 1
        M143 H1 S280 ; set temperature limit for heater 1 to 280C

        Hopefully Dave could give us more informations.

        Danal 1 Reply Last reply Reply Quote 0
        • Danal
          Danal last edited by

          @Bakak -273 would indicate a broken wire (open). 2000C indicates a short.

          Debugging step: Plug and unplug the sensor wires. It is OK to do this while powered up. (NEVER plug a motor while powered up). Watch for changes on the web console and report back.

          Debugging step: Measure the resistance of each sensor Using a DVM or similar

          Report that all back here.

          Delta / Kossel printer fanatic

          A Former User 1 Reply Last reply Reply Quote 0
          • Danal
            Danal @CaiJonas last edited by Danal

            @CaiJonas said in Heater 0 and Heater 1 reading 2000°C:

            M308 S0 P"bedtemp" Y"thermistor" T100000 B4138 ; configure sensor 0 as thermistor on pin bedtemp

            My "standard off the shelf" thermistors that come with E3D V6 hotends are configured like this:

            M308 S1 P"1.temp0" Y"thermistor" T100000 B3950 A"HE1"

            That beta value in your config, B4138, where did that originate? And where did the thermistor itself, the physical device, where did it originate?

            Delta / Kossel printer fanatic

            1 Reply Last reply Reply Quote 0
            • CaiJonas
              CaiJonas last edited by

              Hi @Danal

              I wrote this config a while ago, can't rember where I got the infos from but it works with other duet wifis. I tried your and the following config without any succes:
              M308 S1 P"e0_temp" Y"thermistor" T100000 B4725 C7.06e-8 ; define E0 temperature sensor
              M950 H1 C"e0_heat" T1 ; heater 1 uses the e0_heat pin and sensor 1
              I tried two different e3d thermistors on e0, e1 and bed connectors for the heatsensor. No succes
              I measured the resistant, thermistors and wiring is fine.

              I think my WiFi board is falty, temp always 2000°C. Never had this proble, before and i build up 6 3D Printer, all with duet boards

              droftarts Danal 2 Replies Last reply Reply Quote 0
              • droftarts
                droftarts administrators @CaiJonas last edited by

                @CaiJonas What firmware? Commands are formatted for RepRapFirmware 3. Send M115 to the Duet, post the response. New Duets do not come with RRF3, usually 2.03.

                @Bakak What firmware? Send M115 to the Duet, post the response. Post your config.g too.

                Ian

                Cartesian bed-slinger with Duet 3 Mini 5+ WiFi : RRP Fisher Delta v1 with Duet 2 Maestro : TronXY X5S with Duet 2 Wifi (in progress)

                CaiJonas 1 Reply Last reply Reply Quote 0
                • Danal
                  Danal @CaiJonas last edited by

                  @CaiJonas said in Heater 0 and Heater 1 reading 2000°C:

                  I think my WiFi board is falty, temp always 2000°C.

                  Unplug that temp sensor completely. Still read 2000?

                  Delta / Kossel printer fanatic

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

                    Danal said in Heater 0 and Heater 1 reading 2000°C:

                    Debugging step: Measure the resistance of each sensor Using a DVM or similar

                    Indeed! If they measure about 100kΩ at 20°C they should be ok and then carefully without shorting any pins measure from ground on say the Vin terminal to both pins of the thermistor input and report back readings.

                    1 Reply Last reply Reply Quote 0
                    • Bakak
                      Bakak last edited by Bakak

                      FIRMWARE_NAME: RepRapFirmware for Duet 2 WiFi/Ethernet FIRMWARE_VERSION: 2.03 ELECTRONICS: Duet WiFi 1.0 or 1.01 FIRMWARE_DATE: 2019-06-13b2
                      
                      ; Configuration file for Duet WiFi (firmware version 2.03)
                      ; executed by the firmware on start-up
                      ;
                      ; generated by RepRapFirmware Configuration Tool v2.0.4 on Sat Oct 12 2019 17:04:55 GMT+0200 (Mitteleuropäische Sommerzeit)
                      
                      ; General preferences
                      G90                                         ; send absolute coordinates...
                      M83                                         ; ...but relative extruder moves
                      M550 P"Predator"                            ; set printer name
                      M665 R220 L440.4 B185 H420.607                  ; Set delta radius, diagonal rod length, printable radius and homed height
                      M666 X0 Y0 Z0                               ; put your endstop adjustments here, or let auto calibration find them
                      
                      ; Network
                      M552 S1                                     ; enable network
                      M586 P0 S1                                  ; enable HTTP
                      M586 P1 S0                                  ; disable FTP
                      M586 P2 S0                                  ; disable Telnet
                      M575 P1 B57600 S1				;Serial Port for Panel Due
                      
                      ; Drives
                      M569 P0 S0                                  ; physical drive 0 goes forwards
                      M569 P1 S0                                  ; physical drive 1 goes forwards
                      M569 P2 S0                                  ; physical drive 2 goes forwards
                      M569 P3 S1                                  ; physical drive 3 goes forwards
                      M584 X0 Y1 Z2 E3                            ; set drive mapping
                      M350 X16 Y16 Z16 I1
                      M350 E16 I1                     ; configure microstepping with interpolation
                      M92 X160.00 Y160.00 Z160.00 E412;  E399	    ; set steps per mm
                      M566 X600.00 Y600.00 Z600.00 E160.00  ; set maximum instantaneous speed changes (mm/min)
                      M203 X18000.00 Y18000.00 Z18000.00 E10000.00 ; set maximum speeds (mm/min)
                      M201 X2000.00 Y2000.00 Z2000.00 E1000.00    ; set accelerations (mm/s^2)
                      M906 X1000 Y1000 Z1000 E800 I50             ; set motor currents (mA) and motor idle factor in per cent
                      M84 S30                                     ; Set idle timeout
                      
                      ; Axis Limits
                      M208 Z0 S1                                  ; set minimum Z
                      
                      ; Endstops
                      M574 X2 Y2 Z2 S1                            ; set active low and disabled endstops
                      
                      ; Z-Probe
                      M558 P5 R0.4 H20 F1200 T6000 A10 S0.02                 ; set Z probe type to effector and the dive height + speeds
                      G31 P100 X0 Y0 Z-0.13                           ; set Z probe trigger value, offset and trigger height
                      M557 R180 S18                               ; define mesh grid
                      
                      
                      ; Heaters
                      M305 P0 T100000 B4138 C0 R4700                 ; set thermistor + ADC parameters for heater 0
                      M143 H0 S120                                ; set temperature limit for heater 0 to 120C
                      M305 P1 B4725 C7.060000e-8 R4700                ; set thermistor + ADC parameters for heater 1
                      M143 H1 S280   
                      ;M305 P2 B4725 C7.060000e-8 R4700                ; set thermistor + ADC parameters for heater 1
                      ;M143 H2 S280                                ; set temperature limit for heater 1 to 280C
                      
                      ; Fans
                      
                      
                      M106 P0 S0 F100  C"Bauteillüfter"                    ; set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned off
                      M106 P1 S0.66 H1 F100 T60 L0.3 X0.75              ; set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned on
                      
                      ; Tools
                      M563 P0 D0 H1 F0                            ; 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
                      
                      ; Custom settings are not defined
                      M98 P0:/sys/retract.g
                      T0
                      M501
                      M572 D0 S0
                      G29 S1
                      
                      

                      I'm measuring 120k for the hotend Thermistor and 114k for the Bed thermistor, which should be fine....

                      I mesaure a Voltage of 3.2V from Thermistor0-pin, Thermistor1-pin and Thermistor2-pin to GND. ---However, the VSSA voltage is slowly crawling from 3.2V to 0V while i measure between VSSA and GND. shouldnt VSSA be GND potential?

                      edit: i just noticed... there is a resettable fuse F1... how do i reset it?

                      dc42 A Former User 2 Replies Last reply Reply Quote 0
                      • dc42
                        dc42 administrators @Bakak last edited by

                        @Bakak said in Heater 0 and Heater 1 reading 2000°C:

                        I mesaure a Voltage of 3.2V from Thermistor0-pin, Thermistor1-pin and Thermistor2-pin to GND. ---However, the VSSA voltage is slowly crawling from 3.2V to 0V while i measure between VSSA and GND. shouldnt VSSA be GND potential?

                        Yes, VSSA should be only a few millivolts above ground unless there is a short circuit between VSSA and a higher voltage. The polyfuse connects VSSA to GND. It is self-resetting.

                        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

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                        • A Former User
                          A Former User @Bakak last edited by

                          @Bakak said in Heater 0 and Heater 1 reading 2000°C:

                          there is a resettable fuse F1... how do i reset it?

                          it should as dc42 said self reset; to test it power off the board and measure resistance F1 it, should probably be in the 0-1 ohm range if working.

                          1 Reply Last reply Reply Quote 0
                          • Bakak
                            Bakak last edited by

                            Overload... i guess it broke -.-

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

                              What type of fuse is this?
                              I'm confident, that i can replace it

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

                                @Bakak said in Heater 0 and Heater 1 reading 2000°C:

                                Overload... i guess it broke -.-

                                may sound silly but double check you have a 0 reading when shorting the leads, and make sure to apply some pressure to pierce any oxide layer on the solder joint.

                                @Bakak said in Heater 0 and Heater 1 reading 2000°C:

                                What type of fuse is this?
                                I'm confident, that i can replace it

                                shematic says:

                                Fuse to protect the SAM from VIN applied to VSSA in error.
                                Multicomp MC36207, Bel Fuse 0ZCJ0020FF2E

                                1 Reply Last reply Reply Quote 0
                                • Bakak
                                  Bakak last edited by

                                  yep. just measured again in high ohm range, 15M.

                                  thanks for your help, this saves me a ton of money 😉

                                  1 Reply Last reply Reply Quote 0
                                  • CaiJonas
                                    CaiJonas @droftarts last edited by

                                    @droftarts I'm using the latest release of ReprapFirmware 3, upgrading was the first thing I did. All other things works just perfekt.

                                    @Danal with unplugged sensor it also shows 2000

                                    @dc42 what could I do to test, what is the problem?

                                    Thanks to all so far

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

                                      Bourns MF-MSMF014 is another suitable part number for the VSSA fuse. You can solder the new fuse on top of the old one, which will be easier than trying to remove the old one.

                                      I've never heard of the VSSA polyfuse failing before.

                                      As a temporary workaround, you could connect VSSA on one of the thermistor connectors to GND on one of the endstop connectors. But then you lose the protection against a thermistor short to VIN, which is what the fuse is there to protect against.

                                      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

                                      1 Reply Last reply Reply Quote 0
                                      • Bakak
                                        Bakak last edited by

                                        haha! finally i'm the first to achieve something 😜

                                        I just ordered some of the fuses. don't want to run the board unprotected

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

                                          You don't need a poly fuse or even a surface mount one, any odd fast acting 100mA or so fuse could be either wired between VSSA and GND or solderd in parallell with the existing one would provide protection.

                                          1 Reply Last reply Reply Quote 0
                                          • CaiJonas
                                            CaiJonas last edited by

                                            @Bakak @dc42 I don't get it, what fuse can I measure and what should the value be?

                                            dc42 1 Reply Last reply Reply Quote 0
                                            • Bakak
                                              Bakak last edited by

                                              (duetwifi-F1.png

                                              this one.

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

                                                @CaiJonas said in Heater 0 and Heater 1 reading 2000°C:

                                                @Bakak @dc42 I don't get it, what fuse can I measure and what should the value be?

                                                What revision is your Duet WiFi?

                                                • If it's 1.0 or 1.01 then see https://duet3d.dozuki.com/Wiki/Connector_and_spare_part_numbers#Section_VSSA_fuse.
                                                • If it's 1.02 or later then the polyfuse is the green component between the processor and the WiFi module.

                                                Please check that you are still getting 2000C readings even with just USB power applied (no VIN power).

                                                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

                                                1 Reply Last reply Reply Quote 0
                                                • CaiJonas
                                                  CaiJonas last edited by

                                                  @dc42 I measured a value of 1.1-1.2 ohm and I still get 2000°C readings with just USB power applied. 😞

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

                                                    If you disconnect the thermistors completely and use your multimeter to measure the voltage between the two pins of one of the thermistor connectors, with USB power applied, what voltage does it read? Does it still read 2000C or does it change to -273C ?

                                                    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

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

                                                      @dc42 I measure excactly 3.3V on all three channels and temp stay on 2000C. Do you have a presumtion what the Problem could be?

                                                      1 Reply Last reply Reply Quote 0
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