Amplifier Board / PT100

Discussion in 'General' started by blubb, Aug 6, 2015.

  1. blubb

    blubb Member

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    hey

    any advices how to install the Amplifier Board to a Printrboard ?
    The Amplifier Board has 3 input pins ( 5V , Signal? , GND ) and the printrboards thermistor socket has only 2 ( 5V, GND ).
    How can I mount the PT100 sensor on my Printrboard ?

    greetings
     
  2. elmoret

    elmoret Administrator

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    You need to connect signal to an analog pin on the EXP header, and configure firmware appropriately. You can also get +5v and GND from there.

    Also the thermistor header doesn't have +5v and ground, it has a signal line (which has a pullup to 5v) and ground.
     
  3. blubb

    blubb Member

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    ah ok thank you.
    And I can't use this original signal line as signal ground as ground an take 5v from the exp header or direct from the ps ?
     
  4. 3Dmaker4U

    3Dmaker4U Member

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    Yes,, you can. Actually this is the way you should connect it :)
     
  5. blubb

    blubb Member

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    thx you I will test it :). I hope the new v6 works better than the one I have :D
     
  6. blubb

    blubb Member

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    hey

    i've tried it and it seems to work (a bit ). But the shown temp is at 50°C that can't be normal. My bed temp is at 29°C .
    I have tried the Marlin sensor settings 20 and 147 with no success. Is there something I can do ?

    It's really frustrating with an e3d v6 hotend. Thought I made an upgrade with this hotend but I got nothing but trouble
     
  7. chadaz623

    chadaz623 Member

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    I'm in the process of installing my amplifier as well. Only difference from OP is I'm running on Ramps 1.4. The T0 pins have a 5v and GND. I am a little unclear on how to wire the 3 wire pin connector. Does the 5v and signal go to T0 and I run ground some where else? Or should I run 5v and GND to T0, if so where do I run signal to?
     
  8. chadaz623

    chadaz623 Member

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  9. elmoret

    elmoret Administrator

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    Yes, that link is correct (which is why its listed on the product page). You do not use the thermistor pins with a PT100 sensor.
     
  10. chadaz623

    chadaz623 Member

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    Actually on the PT100 amplifier board the link is not provided. It is only listed on the Thermocouple page.
     
  11. Morten Nielsen

    Morten Nielsen New Member

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    When I feed 5v to my Arduino Mega, the AUX pins on Ramps only delivers 3,22v - anyone know if that is enough for the PT100 amplifier board?
    I CAN feed 5v directly to the board, but it would be nice to have 1 "hub" (ramps) instead.
     
  12. florian

    florian Member

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    So, I was a little quick about buying the amps plus pt100. Apparently they dont work with smoothie, which I happen zo own (according to the devs). Does anyone here know which boards are confirmed compatible?
     
  13. florian

    florian Member

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    Is there anything known about what the resistance value could be for the board? I am working on modifying smoothieware's code to integrate the amplifier.
     
  14. Sanjay

    Sanjay Administrator
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  15. metrowave

    metrowave New Member

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    I would like to buy the PT100 upgrade but really don't know how to use it. Is it possible to add a tutorial video for this on your Youtube channel...
     
  16. elmoret

    elmoret Administrator

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    It depends on your electronics, and it isn't sensible for E3D to make videos of all the electronics out there. Best to make a new thread with your particular setups (electronics) and someone will reply with details.
     
  17. Tyler Barnette

    Tyler Barnette New Member

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    I too have a Printrboard and just bought the PT100 + Volcano from E3D unknowingly. If I understand correctly, I should connect the signal wire from the amplifier board to the thermistor connector on my board, I can use the other thermistor pin for ground, and need to get +5V either from my ATX power supply OR from the EXP pins on the board?

    EDIT: I suppose I could get both +5V and the ground from the ATX PSU
     
  18. kr0sh1

    kr0sh1 Member

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    Yeah I am totally stuck on this upgrade. I've changed my definitions in pins.h to '2' and '3' using the A2 and A3 pins on EXP1 expansion header, I've changed my thermistor type in Marlin to type '20', to define a PT100 thermocouple, and I've checked both amplifiers and they're producing the right voltages.

    All I'm getting is a temp reading of '1100', the table maximum, on both sensors!

    Is there something missing in the translation to connecting the PT100 to a Printrboard? I've heard a lot of mention of pull-up resistors and using the thermistor connections but that makes no sense to me as it's a positive voltage output to an ADC. I'm almost 100% certain it's a software issue but I'm not brilliantly familiar with Marlin's ins and outs.

    Can anyone help me get this sorted once and for all?
     

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