Actuator help

Discussion in 'The Projects Forum' started by Slinkycyrax, Sep 28, 2011.

  1. Slinkycyrax

    Thread Starter New Member

    Sep 28, 2011
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    I have an actuator that I need to activate on it's own and extend and then in 60 minutes, reverse polarity on it's own and close. I would need this to continue this on a loop. And suggestions on relays that would help me on this. Thanks in advance, I'm a new at this just so you know.
     
  2. SgtWookie

    Expert

    Jul 17, 2007
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    Do you have any more information on this "actuator"?
    Like, what voltage and current it requires?
    Maximum and minimum currents?
    Does it have built-in limit switches, or do you need to add them?
     
  3. Slinkycyrax

    Thread Starter New Member

    Sep 28, 2011
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    Thanks for the quick reply. It's an fa-70
    It's requires 12 VDC at 5 amps at full load. Not to sure of the minimum draw. I know it does have a built in limit switch. Here is the link for the specs if that helps at all. http://www.firgelliauto.com/download_file.php?file=16
    Thanks again
     
  4. SgtWookie

    Expert

    Jul 17, 2007
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    How are you going to be powering this actuator?
    Are you building your own power supply, or are you considering operating it from batteries?
     
  5. Slinkycyrax

    Thread Starter New Member

    Sep 28, 2011
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    Currently I have no power supply but my intention is to purchase a converter so that I my plug it into the household
     
  6. Bernard

    AAC Fanatic!

    Aug 7, 2008
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    Then it extends for 60 min., then retracts for a few seconds, then extends again?
    Simple approach might be to use two 555 timer ICs & DPDT relay; first 555 free runs with period of 60 min., at reset it triggers second 555 configured as a one-shot set for retract time + a little safety time margin. Second 555 drives relay [ asuming coil current less than 200 mA ] with normally open contacts set to extend.
    Might want to check post by Dimitris76 also on Projects Forum.
     
    Last edited: Sep 28, 2011
  7. SgtWookie

    Expert

    Jul 17, 2007
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    Well, I'm thinking that Slinky wants it to extend, sit there for 60 minutes, and then retract, and sit there another 60 minutes, and repeat. Is that right?

    If so, a 555 clocking a 14-bit counter that controls a transistor or MOSFET driving a DPDT relay coil could do the trick pretty cheaply. The timing wouldn't be terribly accurate, but I haven't heard how accurate it needs to be.
     
  8. KMoffett

    AAC Fanatic!

    Dec 19, 2007
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    Since there are internal limit switches in the acuator, 1 hour cycles and line power available, Slinky could use a cheap plug-in wall-timer, switching a DPDT 120VAC relay to change the polarity of the 12VDC every 60 minutes.

    Ken
     
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