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    Flashforge Creator Pro Heat bed wiring

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    • emaxundefined
      emax
      last edited by emax

      almost finished wiring of my Flashforge Creator Pro 2016. I am struggling with the Heat bed temp Sensor. I thought it was a thermistor, but there are 4pin connectors. On the bed, it says +3,3, GND and SIG (see picture) Where are the cables going in the duet? Can you give me a hint? Thanks a lot.
      alt text

      Bigger picture heat bed

      Another view

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      • garyd9undefined
        garyd9
        last edited by

        See:

        https://groups.google.com/d/msg/flashforge/4lYQXPe_fA8/ga__vm05AwAJ
        (flashforge google group) It'd be worth your while to read the entire thread at the link, as it chronicles me converting my FFCP to use a duet.

        Text at the link is:

        Uh oh... For the HBP thermistor, it's 4 wires. I'm not sure how to handle that when most things only expect 2 wires for a thermistor. I know some specialized temp probes use 4 wires (PT100, for example), but this isn't supposed to be that fancy. Any suggestions? (Of course, I'll be googling as well...)

        I believe two of them are ground or one is a "no connection". The
        wiring is often an MPC-4 CD ROM audio connector. They are either 4
        or 3 wires. For 3DP, the 3-wire variant is used. But you can use
        the 4 wire variant as well: the 4th wire is just not connected to
        anything.

        See this https://www.flickr.com/photos/d-newman/14557870172/in/album-72157645313526624/

        "I'm not saying that you are wrong - I'm just trying to fit it into my real world simulated experience."

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        • emaxundefined
          emax
          last edited by

          Thanks a lot, good thread. However, I am not that advanced yet in electronics, so I would like to check, if I can wire it like shown below? Or do I have to buy the OSH Park board?

          0_1539677466616_heatbedd.png

          dc42undefined 1 Reply Last reply Reply Quote 0
          • garyd9undefined
            garyd9
            last edited by garyd9

            The very next post in the thread I linked contained the following:

            On the HBP thermistor: I found something that indicated that only pins 1 and 2 on the board are significant (numbering the pins left to right with the PCB printing face up.) It's the thermistor, so no polarity issues.

            HBP: Heated Build Plate
            PCB: Printed Circuit Board

            Here's the tricky part, and the reason I can't (and won't) answer you directly: There are dozens of variants of the flashforge creator pro. Even "true" flashforge printers have changed parts over time - often without making much sense. There are labels on the PCB image you posted, but due to the angle I can't quite read one of them (starts with an "s") and can't figure out which pins are labeled what.

            Most likely, the pin on the far side with the label that starts with an "S" is your SIG (signal) and the middle two pins are GND (ground.) If that's the case, you should be able to use the wires for the S and the adjacent ground.

            If you have a multimeter, you can use it to verify which pins are the thermistor. (google for "how to use a multimeter to measure a thermistor")

            "I'm not saying that you are wrong - I'm just trying to fit it into my real world simulated experience."

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            • dc42undefined
              dc42 administrators @emax
              last edited by

              @emax said in Flashforge Creator Pro Heat bed wiring:

              Thanks a lot, good thread. However, I am not that advanced yet in electronics, so I would like to check, if I can wire it like shown below? Or do I have to buy the OSH Park board?

              0_1539677466616_heatbedd.png

              It may not matter, however I would swap the two red wires in your diagram, so that Signal goes to Thermistor0 and Gnd goes to VSSA.

              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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              • Inlinebrotherundefined Inlinebrother referenced this topic
              • Inlinebrotherundefined
                Inlinebrother
                last edited by

                Hi, did you succeed in your task to wire the bed thermistor?
                Is it truly just a simple thermistor? that would be great

                misterjtcundefined 1 Reply Last reply Reply Quote 0
                • misterjtcundefined
                  misterjtc @Inlinebrother
                  last edited by

                  @Inlinebrother

                  2e53ac24-4409-4c46-a40b-2eb7d0e5b785-image.png

                  I have the same image in my notes for my FFCP.

                  Here also is my config which should further confirm this:

                  ; Heaters
                  M308 S0 P"temp0" Y"thermistor" T100000 B4066       ; configure sensor 0 as thermistor on pin temp0
                  M950 H0 C"out0" T0                                 ; create bed heater output on out0 and map it to sensor 0
                  M307 H0 R0.512 K0.276:0.000 D1.59 E1.35 S0.85 B1   ; enable bang-bang mode for the bed heater and set PWM limit
                  M140 H0                                            ; map heated bed to heater 0
                  M143 H0 S120                                       ; set temperature limit for heater 0 to 120C
                  

                  Hope this helps you.

                  Inlinebrotherundefined 1 Reply Last reply Reply Quote 1
                  • Inlinebrotherundefined
                    Inlinebrother @misterjtc
                    last edited by

                    @misterjtc thank you, I couldn't wait for the answer so I checked that out myself and it worked)
                    And thanks for the config, I think I'll need that after I buy the cable to power the bed)
                    (because for some reason FYSETC Big Dipper clone of Duet 3 mini 5+ has separate bed power input)

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