1. jerrymyersmills

    Thread Starter New Member

    Mar 22, 2011
    29
    0
    i want to slow down a 12 V DC actuator with a variable resistor to increase torque.Does anyone know of any resistor for this purpose ?how do i wire it to operate back and forth smoothly?
    I am thinking of using progressive Automation linear actuator with the following specs:Linear Actuator (Stroke Size 9", Force 400 Lbs, Speed 0.59"/sec) .Does anyone know of any other brands which can be slowed very easily to increase using a variable resistor to increase torque.
     
  2. kubeek

    AAC Fanatic!

    Sep 20, 2005
    4,670
    804
    A resistor will decrase speed as well as torque. You would have to use PWM with higher voltage than it is originally rated, but that could result in frying the motor.

    The only way to reliably increase torque and reduce speed is gearing.
     
  3. jerrymyersmills

    Thread Starter New Member

    Mar 22, 2011
    29
    0
    what type gear would you recommend to reduce speed much considerably?
     
  4. jerrymyersmills

    Thread Starter New Member

    Mar 22, 2011
    29
    0
    So if i should reduce the voltage by 50%,the torque is also going to be reduced by 50% right?
     
  5. whatsthatsmell

    Active Member

    Oct 9, 2009
    102
    4
    It's not linear. The torque will be decreased by well over 50%, and a 50% decrease in voltage with the motor under load will probably fry it.
     
  6. Papabravo

    Expert

    Feb 24, 2006
    10,176
    1,799
    Torque is a function of current, not voltage.
     
  7. gerty

    AAC Fanatic!

    Aug 30, 2007
    1,153
    304
    What exactly are you trying to do?
    How much weight are you trying to move?
    You mention increasing the power on a 400 lb actuator, what are you trying to accomplish?
     
  8. pilko

    Senior Member

    Dec 8, 2008
    213
    20
    Have you considered reducing the speed and increasing the force via a lever?

    pilko
     
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