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    Smart Effector: How Many Temp Wires?

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    Smart effector for delta printers
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    • 3mmundefined
      3mm
      last edited by

      Hi,

      Re; the 1x8 'INPUT2' male connectror, there are four pins named,
      T1, T2, T3, T4. The wiring layout drawing states the T1 & T2 are 'paired' and T3 & T4 are also paired. However, only T2 and T3 are connected to a 1x2 "TEMP" male connector located on the bottom. While it seems obvious that only 2 temperature sensors need be routed to T2 & T3 pins on INPUT2, I rather ask than learn after making the loom, that I need to wire all of the T# pins.

      How many of those four 'T' need be wired and routed to the DUET board?

      And one last item, I presume that the 3mm plaine 'washers' should be used in conjuction with each of the mag-ball bolts? Are the washers really be required?

      Thanks in advance

      3mm

      There are 10 types of people: Those who understand binary and those who don't.

      Mystaundefined 1 Reply Last reply Reply Quote 0
      • Mystaundefined
        Mysta @3mm
        last edited by Mysta

        So the 4 wires are for PT100 or thermocouple I believe. PT100 can use 4 wire or 2 wires, so depending which one is what you need to connect to the bottom side. If you have a 4 wire you'd have to remove the provided connector I believe and put a 4 pin connector on. As for the 8 pin connector that has the T1-T4. If you have a PT100 and may eventually swap to 4 wire or have 4 wire you can go ahead and wire all 4 to the daughter board and remove jumpers. If you're using a standard old thermistor - as the guide says just connect 2 and 3.(If you just want to use PT100 with 2 wires the whole way also just use 2 and 3)

        So really the question is what type of temperature sensor are you using?

        https://duet3d.dozuki.com/Wiki/Smart_effector_and_carriage_adapters_for_delta_printer

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        • 3mmundefined
          3mm
          last edited by

          @Mysta, et al,

          Thanks for the nice informative reply.

          MY Smart-Effector has a two pin TEMP connector soldered onto a PCB pad pattern where a four pin TEMP connector was designed to be soldered. Only the two inner pads (T2 & T3) of that 2 pin connector are physically present and those connections are routed to the 8 pin INPUT2 connector, which is the interface cable connector to the DUET controller.

          The reason I asked the question is, how does a 2 pin connector attach a four wire PT100? Derived from both your answer and the documentation, it seems that my Smart-Effector was improperly assembled. A 4 pin connector that apparently was intended to attach a 4 wire sensor (T1 ~ T4) was mechanically replaced by a 2 pin connector soldered into the 4 pin connector location.

          So if the temperature sensor that I can use, is constrained to only 2 wires, how many and which of the four INPUT2 T1 ~ T4 connection signals need be routed back to the DUET from the INPUT2 connector? That is the question.

          The PCB artwork depicts a silk-screened assembly 'note', which states that T1/T2 and that T3/T4 are each to be paired, while physically my Smart-Effector only has the T2/T3 pins phyically connected, which are PCB routed to the 8 pin INPUT2 connector.

          Which of the four marked numbered 'T' pins on the INPUT2 connector do I route back to the DUET? Also, because of this situation, need I rewire the DUET side of the cable to accomadate the seemingly funky wiring arrangement caused by the usage of a 2 pin connector instead of the intended 4 pin connector?

          Re-iterating again, if a 4 pin TEMP connector had been soldered onto the PCB, I would see the validity of your nice reply. But there is a 2 pin TEMP connector soldered onto the board, not a 4 pin. The artwork has 4 pin pads but it has a 2 pin connector soldered onto it.

          Maybe I'm making a mountain out of a mole-hill? However, the artwork and the schematics don't match the physical hardware I have..

          Thanks in advance

          3mm

          There are 10 types of people: Those who understand binary and those who don't.

          3mmundefined 1 Reply Last reply Reply Quote 0
          • dc42undefined
            dc42 administrators
            last edited by

            Nobody is supplying 4-wire PT100 sensors for 3D printers yet, that's why we fit a 2-pin connector. However, you can use a 2-wire PT100 and still get most of the advantages of a 4-wire one (i.e. cancel most of the wiring resistance), by running 4 wires back from the Smart Effector to the PT100 daughter board.

            If you are using a thermistor and not a PT100, you need only 2 wires.

            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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            • 3mmundefined
              3mm @3mm
              last edited by

              @Mysta,

              Oops, I missed a portion of your reply, re; the 2pin replacement of the 4pin connector. Why didn't they just mount a 4pin?

              And this new board doesn't allow submitted post editing or deletion so we are all stuck with the above blah blah because I missed read your informative post.

              Thanks

              3mm

              There are 10 types of people: Those who understand binary and those who don't.

              3mmundefined Mystaundefined dc42undefined 3 Replies Last reply Reply Quote 0
              • 3mmundefined
                3mm @3mm
                last edited by

                @dc42

                Thanks for the reply. I was very confused, & add a bit of dyslexia and things can get really wobbly at times. :0

                3mm

                There are 10 types of people: Those who understand binary and those who don't.

                1 Reply Last reply Reply Quote 0
                • Mystaundefined
                  Mysta @3mm
                  last edited by

                  @3mm said in Smart Effector: How Many Temp Wires?:

                  @Mysta,

                  Oops, I missed a portion of your reply, re; the 2pin replacement of the 4pin connector. Why didn't they just mount a 4pin?

                  And this new board doesn't allow submitted post editing or deletion so we are all stuck with the above blah blah because I missed read your informative post.

                  Thanks

                  3mm

                  NP, the edit button is at the vertical ellipsis at the bottom right: 0_1524686680845_1e17e2d1-4f45-4ad2-a436-395bc82cf9d1-image.png

                  1 Reply Last reply Reply Quote 0
                  • dc42undefined
                    dc42 administrators @3mm
                    last edited by

                    @3mm said in Smart Effector: How Many Temp Wires?:

                    @Mysta,

                    Oops, I missed a portion of your reply, re; the 2pin replacement of the 4pin connector. Why didn't they just mount a 4pin?

                    Because E3D supplies their thermistors and PT100 sensors with 2-pin connectors. We didn't think users would appreciate having to remove it and crimp a 4-pin one on instead.

                    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
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