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Thread: Who knows something about linear actuators?

  1. #11
    Self proclaimed spoon feeder TruckinMP3's Avatar
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    Originally posted by SuperMatty
    Well here's a hint.
    I'm going to attach the actuator to a cable. Then, accurately pulling that cable to different positions will do different things
    Would that be to control Heat/AC and Fan speeds?.... sounds interesting
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  2. #12
    Constant Bitrate
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    Originally posted by chkdsk
    You will setup 3 reed or lever type switches at 5", 7" then at 12" each on its own button switch with a relay. When you hit the button switch, the relay will engage the Linear Actuator until it hits the corresponding lever switch witch will disable the actuator.
    Wouldn't this mean that the actuator is stopped at 5", 7", and 12" [in order] on its own? So, doesn't this prevent going from, say 5" to 12" (or 12" to 5") in one button push? If you had even more positions, this could get cumbersome.

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  3. #13
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    Originally posted by Filip
    Wouldn't this mean that the actuator is stopped at 5", 7", and 12" [in order] on its own? So, doesn't this prevent going from, say 5" to 12" (or 12" to 5") in one button push? If you had even more positions, this could get cumbersome.
    You are correct - the lever switches would be "fixed distance" orientated rather than "steps". But you could press the 5" button and it would proceed to the 5" lever THEN press the 12" button and it would pass the 7" lever and proceed to the 12" lever.

    I bet it's for weight jacking for a movable ballast, but it most racing (drag racing) it's illegal - am I correct?
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  4. #14
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    OK OK ILL TELL YOU ALL!

    I'm going to attach it to the cable that attaches to my automatic transmission lever and bring back the days of the push-button transmissions. The transmission lever in the Malibu is really dumb so I'd like to replace it with just a piece of aluminum and illuminated buttons

  5. #15
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    Originally posted by SuperMatty
    I'm going to attach it to the cable that attaches to my automatic transmission lever and bring back the days of the push-button transmissions. The transmission lever in the Malibu is really dumb so I'd like to replace it with just a piece of aluminum and illuminated buttons
    OHHhhhh... I see... I thought it was something much more devious! Cool though.

    The actuator you need will have to be fairly fast as you don't want to be waiting and waiting for it to go from Park to Drive. You will be able to do this with Relays and Levers for every single gear selection. The wiring will be complicated but not impossible because it will need to be smart enough to know which direction "Reverse" is from Park OR from Drive.
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  6. #16
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    I was thinking of using digital logic to do it with a Moore machine

    The length of travel is only 5 inches from Park to 1st gear. I figure with an actuator that can move 2 inches per second, or close to it, that should not be too bad considering there's only 2 1/2 inches from Park to Drive.

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