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Thread: Small linear actuators

  1. #1
    Raw Wave lostreception's Avatar
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    Small linear actuators

    I've been searching for quite some time for a small linear actuator that is suitable to move and lift a small PSOne screen out of the dash. Ive worked up an option with a small motor and worm gear but it hangs. Just wondering if you had any suggestions for a linear actuator with about +/- 4-6 inches of throw and little to no torque needed. Everything I've found has torque up the gazoo and all i need to move is > 1/2 lb. (if that).
    Thanks Cabe

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    Rather than a worm gear, have you considered a captured nut with threaded rod through it? Connect the threaded rod to the motor via a piece of silicon tubing over the motor shaft and rod. The captured nut can be attached to the vertical side of the PS one case or, if possible in the center of the back of the base.

    As long as you have it track smoothly, there's no reason you wouldn't be able to use limit switches to operate the motor.
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  3. #3
    Raw Wave treetop777's Avatar
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    Take a look at the slide mechanism of a cd-rom drive.
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  4. #4
    Raw Wave lostreception's Avatar
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    Quote Originally Posted by Bugbyte View Post
    Rather than a worm gear, have you considered a captured nut with threaded rod through it? Connect the threaded rod to the motor via a piece of silicon tubing over the motor shaft and rod. The captured nut can be attached to the vertical side of the PS one case or, if possible in the center of the back of the base.

    As long as you have it track smoothly, there's no reason you wouldn't be able to use limit switches to operate the motor.
    my workup works along that principal finding a motor in that case with enough torque and operating at 12v was my reason for not going that route.

    Quote Originally Posted by treetop777 View Post
    Take a look at the slide mechanism of a cd-rom drive.
    for the slides yes it will work for the motor power to lift it... it is not strong enough even with an old cdrom drive...

    I'm hoping actuators will be easier im getting a bit discouraged and am looking for the easierst solution at this point
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  5. #5
    Vendor - C&C CUSTOMS CabeSipes's Avatar
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    What you want is called a mini actuator from Select Products. They were bought out by AMP of America but they should still carry it.

    http://shop.selectproducts.com/diy/printitem.asp?Source=CK&CartId={20EVERESTBC7FB3-BB2B-4880-8858-743329EBC3E3}&ic=ACT0004

    I know the picture is small but if I get a chance later today I will get one out and take a picture of it for you. I have some laying around here somewhere. If you have never seen one its basically the rod, a seperate cable and the motor. It allows you tou mount the rod and motor seperately to save space and it will push a PS One all day long. If you search there site they sell this whole kit with switches and tracks.

    http://shop.selectproducts.com/diy/customkititems.asp?CartId={F055CF3E-D0C8-45D9-8DCE-129F01A0EVEREST2755}&kc=ACTKIT1&eq=

    Let me know if this helps.
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  6. #6
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    im also trying to move a 7" screen up and down a few inches..

    maybe something like this? :

    http://www.youtube.com/v/ULe6ZUL4a-Y

    he made this with servos but i dont know the 1st thing about servos .. any help?

  7. #7
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    I build my own frequency generator and used a RC car servo for my license plate unit. It was quite simple.

  8. #8
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    Quote Originally Posted by Adriano View Post
    I build my own frequency generator and used a RC car servo for my license plate unit. It was quite simple.
    any detailed DIY ?

  9. #9
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    You don't need a frequency generator. You need something called a servo tester (which is a ready made frequency generator). Google it and you'll find them cheap. You buy two and wire them into a relay. Set one to the open position, one to the close position. Flip flop them using the relay.

    Keep in mind that servos only hold their position if there is power applied to them. If it requires forces to keep the screen closed, when you turn the car off, it might not hold it.

    A Fusion brain can be programmed to do the same thing but requires the computer to command it to do so. If the computer doesn't boot, you won't be able to command the servo.

    Another option is an Arduino board. You can program this board for the open/closed positions and it will remember them even when it is powered down. Using an Arduino requires a small amount of programming knowledge as you write the program on a computer and upload it to the Arduino. Also, you'll have to do a little wiring of buttons and servos but it should be pretty basic stuff.

    Summary:

    1. Servo test is simplest, least elegant, still requires some electrical knowledge for wiring the relay
    2. Fusion brain, will work but won't work when pc is off, I think the mdx software will help you program this, plus the FB does a whole lot more
    3. Arduino is most elegant solution but requires some electrical knowledge and a small amount of programming.
    Quote Originally Posted by ghettocruzer View Post
    I was gung ho on building a PC [until] just recently. However, between my new phone having internet and GPS and all...and this kit...Im starting to have trouble justfiying it haha.
    Want to:
    -Find out about the new iBug iPad install?
    -Find out about carPC's in just 5 minutes? View the Car PC 101 video

  10. #10
    MySQL Error soundman98's Avatar
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    [blatant plug for new device]

    you could also use a qube-- from what i understand it can also be programmed and controlled without computer needing to be on...

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