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Re: Servo driver question.

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  • dickenssrs
    Frank, I wrote an article a couple of years ago with a similar circuit to investigate the signals that servos responded to. Each servo has its specific
    Message 1 of 4 , Oct 31, 2002
      Frank,
      I wrote an article a couple of years ago with a similar
      circuit to investigate the signals that servos responded
      to. Each servo has its specific characteristics that
      you need to understand to use it to its potential.

      See my article/circuit at:
      http://tomdickens.com/68hc11/servo/servo.html


      --- In SeattleRobotics@y..., "Frank Gutierrez" <fwankg@y...> wrote:
      > Hello,
      >
      > I have built the following schematic.
      >
      > http://users.chariot.net.au/~samstain/servodriver.html
      >
      > The circuit works very well. But I have a question. I've read
      that
      > servos need 1mS to 2mS to operate. When I turn the pot. to both
      > extremes, the servo (Futaba 3003) only travels 90 degrees. I want
      > this servo to travel 180 degrees or better. I also hooked up an o-
      > scope to its output and the on-time is very close to 1mS to 2mS.
      So
      > you would think that the servo would turn to pretty close to it's
      > extremes. Is there something I don't know about the circuit or am
      I
      > asking too much?
      >
      > Thanks in advance.
      >
      > Frank G.
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