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Thread: HVAC temp actuator

  1. #11
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    Would this type base position on a pulse value at all?

    OH, and my initial part came (the one in the picture), and it does have 5 pins. Is that a good or bad thing for what I'm trying to do?

    Sorry for all the questions. I've never done this type of thing before, and I'm trying to learn and figure it all out.

    But I really appreciate all the help!

  2. #12
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    Does anyone have any examples of ones that would work, or links to them? Or know if the one I already have in the picture will work (it is a 5 pin). If the one I have won't work, I don't have any problem with just buying a different one, I just need to know what would work best. Preferably one that would be the easiest to work with on the Fusion Brain.

  3. #13
    FLAC mauri's Avatar
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    ONLY the original actuators by Audi have five wires running.
    Two of these feed the DC motor (+12 and GND)
    The other three send resistive information (via the potentiometer under the gears and its circuit board)
    to the electronic control unit that operates the AUTOMATIC air conditioner.
    These actuators are not just for simple manual climate control.
    See here an example of how are internally by Audi TT 8N...

    http://www.youtube.com/watch?feature...&v=krjbRMR5wWE

  4. #14
    FLAC SNOtwistR's Avatar
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    You might want to look at phidgets website. they have a bunch or stepper motor's/servo's/linear servo's and I am sure they will work with FB. SNO

  5. #15
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    If I were doing this, I would use readily available hobby type servos that are easy to control and interface. The hard part would be making sure the one chosen had enough torque to do the job and then figuring out the mechanical linkage into the existing system. It would be much easier if you had experience working with servos such as those used in R/C cars and aircraft.

  6. #16
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    I checked out the phidgets web site, lots of stuff there that looks promising. Would a stepper motor or a servo be my best bet? I would like to get whatever is easiest to work with. Wasn't sure which one worked with the Pulse width type, or if PWM was easiest or what.

  7. #17
    FLAC SNOtwistR's Avatar
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    I would thing a linear actuator would be the better route. Depending on if your system used a cable to move the damper door. I think it would take too long for stepper to move to the next setting. Although I really have not use any of the different types of units. SNO

  8. #18
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    Yeah, mine uses a cable to move the door.

  9. #19
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    Ok, after about a year, I'm picking this back up again. I'm a complete NOOB, and really need help. I don't know much about servo motors etc. I am hoping someone can let me know what I need to buy, and how I program it to work with my system. My factory system temp is controlled by a cable currently, so I need to allow the Fusion Brain to control it for me.

  10. #20
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    Would this one suite my needs better?

    hitecrcd.com/products/servos/sport-servos/analog-sport-servos/hs-422-deluxe-standard-servo/product

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