• Tags
  • Documentation
  • Order
  • Register
  • Login
Duet3D Logo Duet3D
  • Tags
  • Documentation
  • Order
  • Register
  • Login

Chamber heater wiring problem

Scheduled Pinned Locked Moved
Duet Hardware and wiring
2
13
1.5k
Loading More Posts
  • Oldest to Newest
  • Newest to Oldest
  • Most Votes
Reply
  • Reply as topic
Log in to reply
This topic has been deleted. Only users with topic management privileges can see it.
  • undefined
    dc42 administrators
    last edited by 15 May 2017, 21:00

    Do you get the error report on the chamber thermistor as soon as you start the Duet, or only when you try to heat the chamber?

    If it's right from the start, what reading do you get if you plug the bed thermistor into the E1 thermistor connector?

    You need to use M307 to force bang-bang mode, not M301 (that was for older firmware).

    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
    • undefined
      digiex_chris
      last edited by 15 May 2017, 23:58

      Ah, thanks, I'll switch to M307.

      It's in the error state immediately as i power it on. No change if I swap to the other extruder thermistor connector. I did execute X3 on the end of M305, which got me a temp display pegged at 88c, it doesn't really move.

      M305 P2 T100000 B3974 R4700 H30 L0 X3

      But X3 must not be right.

      1 Reply Last reply Reply Quote 0
      • undefined
        dc42 administrators
        last edited by 16 May 2017, 06:01

        Did you try plugging the bed thermistor into the E1 connector as I suggested? This would tell us whether it it the thermistor that is at fault.

        In the error state, what is the temperature reading?

        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
        • undefined
          digiex_chris
          last edited by 17 May 2017, 01:55

          I did, infact I tried a spare thermistor, then I tried with a new thermistor plugged into the spare channel so that it had a thermistor in each channel. Then I swapped them around. No such luck.

          @dc42:

          Did you try plugging the bed thermistor into the E1 connector as I suggested? This would tell us whether it it the thermistor that is at fault.

          In the error state, what is the temperature reading?

          1 Reply Last reply Reply Quote 0
          • undefined
            dc42 administrators
            last edited by 17 May 2017, 06:32

            And the temperature reading?

            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
            • undefined
              digiex_chris
              last edited by 18 May 2017, 02:10

              @dc42:

              And the temperature reading?

              I don't get a reading, it just says "error", unless I use the X3 parameter, in which case I get 88

              1 Reply Last reply Reply Quote 0
              • undefined
                digiex_chris
                last edited by 18 May 2017, 02:14

                @dc42:

                And the temperature reading?

                Oops, M105 reports T:20.3 B:21.8 C:-273.1

                1 Reply Last reply Reply Quote 0
                • undefined
                  dc42 administrators
                  last edited by 18 May 2017, 05:56

                  It's been a while since I tested the chamber heater support, so I'll re-test it.

                  You could a!so try plugging the thermistor into the E0 thermistor connector and using X1 in your M305 P2 command.

                  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
                  • undefined
                    digiex_chris
                    last edited by 18 May 2017, 23:00

                    That also gave me an error state with a large negative temperature. I'm wondering if the combination of the first hotend temperature control using a PT100 is a factor?

                    1 Reply Last reply Reply Quote 0
                    • undefined
                      dc42 administrators
                      last edited by 19 May 2017, 07:46

                      Use of a PT100 for the hot end shouldn't affect the availability of the E0 and E1 thermistor inputs.

                      Perhaps you have a bad crimp connection on the thermistor? As you have a known working bed thermistor, try plugging that into the E0 or E1 thermistor connector, and your other thermistor into the bed thermistor connector, to see what readings you get.

                      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
                      • undefined
                        digiex_chris
                        last edited by 20 May 2017, 01:24

                        Thanks! That was exactly the suggestion I needed to figure it out. Turns out the 5 thermistors I have on hand that came with connectors pre-crimped, something is wrong with them. None of them give a temperature reading, but plugging in the bed thermistor gives a sane chamber reading. Obviously that means something is wrong or unknown about my spare thermistors. An ohm meter also doesn't give a reading with them. Must have got a bad batch.

                        1 Reply Last reply Reply Quote 0
                        • undefined
                          digiex_chris
                          last edited by 20 May 2017, 01:34

                          yup, all 5 crimped onto the insulation instead of bare wire, by the supplier.

                          1 Reply Last reply Reply Quote 0
                          11 out of 13
                          • First post
                            11/13
                            Last post
                          Unless otherwise noted, all forum content is licensed under CC-BY-SA