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Thread: reversable motor for monitor?

  1. #151
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    Quote Originally Posted by sproggy
    Maybe the work I did a few years ago may help save you some time and effort. The controller I built used a PIC processor controlling 1 or 2 servos with all settings including end stops, time delays and speeds stored in the processors flash memory and set using 2 buttons. All the info you should need, including the code, linked below.

    http://www.atst09.dsl.pipex.com/servo.html

    Have fun

    Sproggy
    Thats sweet!
    I would like to take a look at how you programmed it, to bad the code is in HEX (I cant read it).
    It's the cake having/eating thing.

  2. #152
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    Mike, here's sproggy's design for two servos.

    It's the cake having/eating thing.

  3. #153
    Raw Wave
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    Are you sure the RC servo have enough movement to move the LCD fully in and out of its casing? It can only rotate by something like 180 deg...maybe more.

  4. #154
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    Quote Originally Posted by Ricky327
    Are you sure the RC servo have enough movement to move the LCD fully in and out of its casing? It can only rotate by something like 180 deg...maybe more.
    I really just wanted to see what you guys think about doing it with servos.
    If there's some big advantage or its a lot easier to code. And Mike wanted to see how it was done also.
    It's the cake having/eating thing.

  5. #155
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    I would rather use servos, cut the limiters off and run them in free spin mode

    Im not sure if I follow you there. Servo is supposed to send feedback to the control so the motor will stop when the required positions is reached. The typical RC servo I have seen have a potentiometer connected to the servo shaft to sense the current position. Removing the feedback will no longer be classified as a servo?

    Cutting this will result in the motor forever spinning since the required position will never get reached.

    This is all I can rememeber when I was kid playing with servo stuff...havent touched them for ages...did I missed something?

  6. #156
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    I really just wanted to see what you guys think about doing it with servos.

    I doubt if you can use servo in what you are trying to do. As I said servos movement are very limited...if you can design the LCD mechanism such that it only require an inch movement to have it fully in/out of its casing then the servo will work. With the motor/limit switch design you can have a mile long movement if you wish.

  7. #157
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    Quote Originally Posted by Ricky327
    I really just wanted to see what you guys think about doing it with servos.

    I doubt if you can use servo in what you are trying to do. As I said servos movement are very limited...if you can design the LCD mechanism such that it only require an inch movement to have it fully in/out of its casing then the servo will work. With the motor/limit switch design you can have a mile long movement if you wish.
    Actually the way I plan on using the motor it will only have 1/2 turn and the right side of the monitor will move out about 1 1/2". A DC motor or a servo would have enough travel.
    It's the cake having/eating thing.

  8. #158
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    Actually the way I plan on using the motor it will only have 1/2 turn and the right side of the monitor will move out about 1 1/2". A DC motor or a servo would have enough travel.

    Cool...show us the design

  9. #159
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    Quote Originally Posted by Ricky327
    Actually the way I plan on using the motor it will only have 1/2 turn and the right side of the monitor will move out about 1 1/2". A DC motor or a servo would have enough travel.

    Cool...show us the design
    Look atmy first post to see how far it has to move there are two pictures one open and one closed. Gutterslide gave me the idea for the mechanical part (page 6 post 83), he posted a drawing. Its just a arm on the motor with a rod attached to the end, the other end of the rod connects to the monitor.
    It's the cake having/eating thing.

  10. #160
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    Sorry I havent read the whole thread, I think I get it now.

    But the theres hardly any difference between close and open

    Is it like that so you can see the screen better? If thats all you need to move then go for the servo then...much easier than having to add limit switches.

    I kept thinking the mechanism will slide the LCD in and out of its casing...you know the typical stuff sorry my mistakes

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