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dc motor control

Discussion in 'Sensors and Actuators' started by mmmcheechy, Oct 23, 2011.

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  1. mmmcheechy


    Oct 23, 2011
    I know hardly anything about electronics.
    I'd like to make a small motor tighten a screw to a certain torque load(88inlb)
    Then I need it to reverse only a couple revolutions(2-3)
    What type of circuitry do i need to push a button once to tighten to specific torque.
    And push the same button to back it off.
    I'd like to use a dpdt push button.

    12v dc system
  2. davenn

    davenn Moderator

    Sep 5, 2009
    Hi there
    welcome to the forums :)

    This is as much a mechanical job as it is electronic

    firstly there are torque screwdrivers available, I use them in my workshop.
    it could be mounted into a frame and a motor would have to be connected to it via some gearing to slow the motor speed down. thats the initial mechanical part.

    You then need feedback from the torque screwdriver so that the electronics would know when s-driver shaft stopped rotating ( ie. the screwdriver starts clicking when set torque value is achieved) and stop the power to the s-driver.
    Then you need to be able to get the electronics to turn the motor in the reverse direction for a couple of seconds then stop.
    A timer circuit like a 555 IC and some other electronics.

    yes its quite achieveable. For a beginner in electronics and engineering may be a bit difficult without some onhand help.


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