Can you build me a DC motor speed controller?

Discussion in 'The Projects Forum' started by diy549, Jul 9, 2009.

  1. diy549

    Thread Starter Member

    May 16, 2009
    11
    0
    Hello all, I need a speed controller to control the motor speed of my two DC gear motors. I am trying to get a consistent speed under different loads. The motors are 12 volts and 6 amps and they are coupled together. Here is the link

    PM me a price and for more details.

    Thanks
     
  2. mik3

    Senior Member

    Feb 4, 2008
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    63
    The link is missing.
     
  3. diy549

    Thread Starter Member

    May 16, 2009
    11
    0
    fixed it..
     
  4. mik3

    Senior Member

    Feb 4, 2008
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    63
    How the motors are coupled together and why?
     
  5. diy549

    Thread Starter Member

    May 16, 2009
    11
    0
    With a rod, They need to move at the exact same speed.
     
  6. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    This is quite hard to achieve even with a closed loop control system. If one motor rotates a bit slowly it will load the other one and make more harm than good.

    Why you connect the motors on the same axis?
     
  7. diy549

    Thread Starter Member

    May 16, 2009
    11
    0
    so far its working great. One motor was moving a tab bit slower, so I coupled them and now they are both moving a the same rate. They are only on for 30 seconds at a time, so I think it will be fine.
     
  8. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
  9. Bernard

    AAC Fanatic!

    Aug 7, 2008
    4,176
    397
    1. What do you have for a power supply?
    2. What speed desired, & tollerance?
    3. Is reverse needed?
     
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