ac motor and limit switches

Discussion in 'The Projects Forum' started by tuke, Feb 9, 2011.

  1. tuke

    Thread Starter New Member

    Sep 11, 2010
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    Hi everyone,
    I need some help as my knowledge is limited in this department. What I'm trying to accomplish is make and egg turner or rocker for an incubator. Picture a kids seesaw with a pivot in the center that rocks up and down. I have a small AC gearmotor reclaimed from a microwave turntable that is attached to a type of cam linkage to make the seesaw go up and down. What I need to know is is it possible to attach a couple of micro switches to stop the motor at the top and bottom of the stroke. This will also be attached to a timer to start at specific times. Any help greatly appreciated. ​
     
  2. KMoffett

    AAC Fanatic!

    Dec 19, 2007
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    What is the time between cycles? How long is one cycle?

    Ken
     
  3. tuke

    Thread Starter New Member

    Sep 11, 2010
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    I would say every 5-6 hrs it would need to start and move to the up or down position.
     
  4. KMoffett

    AAC Fanatic!

    Dec 19, 2007
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    How long does take to move from up to down?

    Ken
     
  5. tuke

    Thread Starter New Member

    Sep 11, 2010
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    Probably in the 20 -30 second range.
     
  6. KMoffett

    AAC Fanatic!

    Dec 19, 2007
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    Just set the timer for the times you want the motor to start. Have the timer switch off after the minimum time...15 minutes for electromechanical-mechanical and 1 minute for digital timers. Don't know how much current the motor draws, but the limit switches must be able to handle that current.

    Ken
     
  7. tuke

    Thread Starter New Member

    Sep 11, 2010
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    Ken, thank you that is exactly what I was trying to figure out but my brain and electronics don't get along. I always seem to have massive brain fartage :eek: when it comes to how to connect all the components.
    Thanks again.
    Ed
     
  8. tuke

    Thread Starter New Member

    Sep 11, 2010
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    Just and update, I put everything together, ( took a few times as I'm electronic dense ) and it works like champ. I didn't have the 3300 μf cap but scrouged up a 4700 μf and increased the cycle time a little but its still well within the time needed for a full stroke of the rocker.
     
  9. KMoffett

    AAC Fanatic!

    Dec 19, 2007
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    Great! It's nice to hear back on the success of a project. The 3300uF was just an estimate and depends on the relay's coil resistance and it's drop-out voltage.

    Ken
     
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