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    PT100 with a Duet-3-6HC & Tool-Board-LC1 ?

    Duet Hardware and wiring
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    • JayJay
      JayJay last edited by JayJay

      As per the title

      The Board is a Duet-3-6HC with a Toolboard-LC1 (v1.0) mounted on the head.
      I have a 2 Wire PT100 which I want to install.

      The sparse documentation that there is, is as clear as mud. So what’s the actual procedure for connecting a PT100 with the toolboard-LC1?

      The documentation lists to use a Max31865 daughter board with the Duet-3 and there is an intimation that the MAX31865 should be plugged in to the expansion board but that seems to point to the 3HC expansion board, and nothing shows up for connecting a PT100 to a toolboard-LC1 (or anything specifically saying you CANT)

      I think there is x3 scenarios

      1. The toolboard-LC1 can take a PT100 without the daughter board? If so how is that supposed to be wired and where can I find the wiring diagram?

      2. Or you can wire the daughter board into the toolboard-LC1, and again if so how is that supposed to be wired and where can I find the wiring diagram?

      3. Or with a toolboard-LC1 you are required to install the daughterboard on the main board and run 2 wires to the tool-head.

      I have thought of a 4th possibility which would be my preferred choice if the toolboard-LC1 can accept a daughterboard. I also have a FYSETC PT100 Amplifier Board which show the input side as 5V, SIG, GND and output to the PT100.

      Would it be possible to connect the FYSETC amplifier board to the toolboard-LC1 to the IO2 socket? that socket seems the most likely candidate having +5V, io2.in, GND pins on it.

      If that is possible my next question is how should the M308 command be configured to allow this to operate correctly?

      I am thinking

      M308 S1 P P"121.IO2" Y" rtd-max31865"
      

      Anyone from the Official Duet Support team care to comment.

      Stephen6309 dc42 2 Replies Last reply Reply Quote 0
      • jay_s_uk
        jay_s_uk last edited by

        I don't think PT100's are supported for the toolboard.

        Two thermistor or PT1000 inputs (Temp0 and Temp1). One (input Temp0) uses a 16-bit ADC for high resolution reading of PT1000 sensors.
        

        Owns various duet boards and is the main wiki maintainer for the Teamgloomy LPC/STM32 port of RRF

        1 Reply Last reply Reply Quote 0
        • Stephen6309
          Stephen6309 @JayJay last edited by

          @JayJay You have to use the PT100 daughter board on the 6HC. The 1LC desn't have any connections for a PT100 daughter board.

          JayJay 1 Reply Last reply Reply Quote 0
          • JayJay
            JayJay @Stephen6309 last edited by

            @Stephen6309 said in PT100 with a Duet-3-6HC & Tool-Board-LC1 ?:

            @JayJay You have to use the PT100 daughter board on the 6HC. The 1LC desn't have any connections for a PT100 daughter board.

            I know the LC1 doesnt have a 2 row 5 pin connector, which is why i asked if it would be possible to throughput the FYSETC amplifer on IO2 back to the main board.

            Stephen6309 Veti 2 Replies Last reply Reply Quote 0
            • Stephen6309
              Stephen6309 @JayJay last edited by

              @JayJay Check the firmware source code to see if a PT100 daughter board is supported on the 1LC. If it is, you might be able to determine how to connect it.

              JayJay 1 Reply Last reply Reply Quote 0
              • JayJay
                JayJay @Stephen6309 last edited by

                @Stephen6309 said in PT100 with a Duet-3-6HC & Tool-Board-LC1 ?:

                @JayJay Check the firmware source code to see if a PT100 daughter board is supported on the 1LC. If it is, you might be able to determine how to connect it.

                That is an option but a real waste of time, when all it takes is for someone from the duet support team to advise if i can throughput the signal from the the FYSETC amplifier back through the toolbaord to the mainboard or not.

                1 Reply Last reply Reply Quote 0
                • Veti
                  Veti @JayJay last edited by

                  @JayJay said in PT100 with a Duet-3-6HC & Tool-Board-LC1 ?:

                  s why i asked if it would be possible to throughput the FYSETC amplifer on IO2 back to the main board.

                  pt100 sensor need an spi bus which io2 can not provide.

                  i would suggest getting a pt1000 sensor

                  JayJay 1 Reply Last reply Reply Quote 1
                  • JayJay
                    JayJay @Veti last edited by JayJay

                    @Veti said in PT100 with a Duet-3-6HC & Tool-Board-LC1 ?:

                    i would suggest getting a pt1000 sensor

                    Thats not happening, if the supposed best control board cant accept an analog input from a P100 amplifier thats a pretty poor show.

                    I would rather rip out the Duet-3 , install the 32bit GTR PRO V1.0 and run Klipper/Octoprint with the dwc2-for-klipper-socket, a board I know is going to accept an analog signal.

                    jay_s_uk Nuramori 2 Replies Last reply Reply Quote 0
                    • jay_s_uk
                      jay_s_uk @JayJay last edited by

                      @JayJay that may be the way to go then as it won't be getting PT100 support. not enough room for all the components

                      Owns various duet boards and is the main wiki maintainer for the Teamgloomy LPC/STM32 port of RRF

                      JayJay 1 Reply Last reply Reply Quote 0
                      • JayJay
                        JayJay @jay_s_uk last edited by JayJay

                        @jay_s_uk said in PT100 with a Duet-3-6HC & Tool-Board-LC1 ?:

                        @JayJay that may be the way to go then as it won't be getting PT100 support. not enough room for all the components

                        Everyone seems to be missing my point, and the reason I asked for someone from offical support to comment

                        which is (if other options are not possible): can i throughput a single wire analog signal to the mainboard via the toolboard or not.

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

                          no, you can't.
                          plus, look at the limitations... https://duet3d.dozuki.com/Wiki/Duet_3_firmware_configuration_limitations#Section_Permanent_limitations

                          Owns various duet boards and is the main wiki maintainer for the Teamgloomy LPC/STM32 port of RRF

                          JayJay 1 Reply Last reply Reply Quote 0
                          • JayJay
                            JayJay @jay_s_uk last edited by

                            @jay_s_uk said in PT100 with a Duet-3-6HC & Tool-Board-LC1 ?:

                            no, you can't.
                            plus, look at the limitations... https://duet3d.dozuki.com/Wiki/Duet_3_firmware_configuration_limitations#Section_Permanent_limitations

                            Anyone want to buy a Duet-3 ?

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

                              you should get some fairly good response on ebay. not many get sold second hand so theres a good market

                              Owns various duet boards and is the main wiki maintainer for the Teamgloomy LPC/STM32 port of RRF

                              JayJay 1 Reply Last reply Reply Quote 0
                              • JayJay
                                JayJay @jay_s_uk last edited by

                                @jay_s_uk said in PT100 with a Duet-3-6HC & Tool-Board-LC1 ?:

                                you should get some fairly good response on ebay. not many get sold second hand so theres a good market

                                ebay.. ewwww no thank you, thats just asking to get bent over forwards when someone makes spurious claims about nothing to ebay

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

                                  well i'm sure you have a good bin located in your workspace

                                  Owns various duet boards and is the main wiki maintainer for the Teamgloomy LPC/STM32 port of RRF

                                  JayJay 1 Reply Last reply Reply Quote 0
                                  • JayJay
                                    JayJay @jay_s_uk last edited by JayJay

                                    @jay_s_uk said in PT100 with a Duet-3-6HC & Tool-Board-LC1 ?:

                                    well i'm sure you have a good bin located in your workspace

                                    aint that the truth , a somewhat sad state of affairs when that is all the supposed best is use for.

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

                                      i on the other hand have no issues with my duet 3 or with any of my other boards running RRF

                                      Owns various duet boards and is the main wiki maintainer for the Teamgloomy LPC/STM32 port of RRF

                                      JayJay 1 Reply Last reply Reply Quote 0
                                      • JayJay
                                        JayJay @jay_s_uk last edited by

                                        @jay_s_uk said in PT100 with a Duet-3-6HC & Tool-Board-LC1 ?:

                                        i on the other hand have no issues with my duet 3 or with any of my other boards running RRF

                                        lucky you, but I suppose its too much to expect for it to do something so simple, and will be looked upon much like the "special use case" deckingman endures.

                                        deckingman 1 Reply Last reply Reply Quote -1
                                        • Veti
                                          Veti last edited by

                                          what do you have against pt1000 sensors?

                                          JayJay 1 Reply Last reply Reply Quote 1
                                          • JayJay
                                            JayJay @Veti last edited by

                                            @Veti said in PT100 with a Duet-3-6HC & Tool-Board-LC1 ?:

                                            what do you have against pt1000 sensors?

                                            Nothing, but I already have PT100 sensors, PT100 amplifiers and even a genuine Duet PT100 Daughter board, so why should i buy (and wait months) for more components when even a simple ramps based boards can accept a single wire analog signal.

                                            And when i also have a few GTR V1.0 boards, if im going to have to rewire anyway why should I stick with the Duet if it cant do simple things.

                                            jay_s_uk 1 Reply Last reply Reply Quote 0
                                            • jay_s_uk
                                              jay_s_uk @JayJay last edited by

                                              @JayJay none of us are stopping you from changing.
                                              just please don't install the version of RRF for the GTR as I'd rather not have to help you with support

                                              Owns various duet boards and is the main wiki maintainer for the Teamgloomy LPC/STM32 port of RRF

                                              JayJay 1 Reply Last reply Reply Quote 2
                                              • JayJay
                                                JayJay @jay_s_uk last edited by JayJay

                                                @jay_s_uk said in PT100 with a Duet-3-6HC & Tool-Board-LC1 ?:

                                                @JayJay none of us are stopping you from changing.
                                                just please don't install the version of RRF for the GTR as I'd rather not have to help you with support

                                                Which part of Klipper/Octoprint is RRF ? i dont think it does have a RRF component in it, the best thing that was going for the Duet was the DWC and the fact that Klipper can now run DWC means people are no longer tied to the hardware to run the DWC.

                                                DWC for klipper

                                                jay_s_uk Veti 2 Replies Last reply Reply Quote 0
                                                • jay_s_uk
                                                  jay_s_uk @JayJay last edited by jay_s_uk

                                                  @JayJay thats good. if you don't know about the STM port of RRF, I won't tell you

                                                  Owns various duet boards and is the main wiki maintainer for the Teamgloomy LPC/STM32 port of RRF

                                                  1 Reply Last reply Reply Quote 0
                                                  • Veti
                                                    Veti @JayJay last edited by

                                                    @JayJay
                                                    there is https://github.com/meteyou/mainsail

                                                    1 Reply Last reply Reply Quote 0
                                                    • deckingman
                                                      deckingman @JayJay last edited by

                                                      @JayJay said in PT100 with a Duet-3-6HC & Tool-Board-LC1 ?:

                                                      @jay_s_uk said in PT100 with a Duet-3-6HC & Tool-Board-LC1 ?:

                                                      i on the other hand have no issues with my duet 3 or with any of my other boards running RRF

                                                      lucky you, but I suppose its too much to expect for it to do something so simple, and will be looked upon much like the "special use case" deckingman endures.

                                                      I saw my name mentioned. For what it's worth, I used to run PT100s on my gen 2 Duet Ethernet but ditched them long ago (well before I "upgraded" to gen 3) and reverted back to simple thermistors. They were just more trouble than they were worth IMO. The main problem being susceptibility to noise which I never fully cured (tried 4 wire mode, screened cable and all that stuff). PT100s may be inherently more accurate but if the signal is noisy, that simply negates any benefits.

                                                      I've made it fairly clear that I'm not the biggest fan of Duet Gen3 but personally, I wouldn't use the lack of support for PT100s as a reason to ditch it.

                                                      Ian
                                                      https://somei3deas.wordpress.com/
                                                      https://www.youtube.com/c/deckingman/

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