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Futaba Servo Help — Parallax Forums

Futaba Servo Help

NWCCTVNWCCTV Posts: 3,629
edited 2010-03-21 05:09 in BASIC Stamp
Does anyone know if the settings for running a Futaba FP-S148 servo are the same as the standard Parallax servo's when running the sample programs in the WAM manual?

Comments

  • Beau SchwabeBeau Schwabe Posts: 6,570
    edited 2010-03-21 00:13
    NWCCTV,

    The code should be the same... what you will need to pay attention to is the particular BS2 you are using, as that might have a different time base that you will need to adjust.

    See PULSOUT in the Stamp IDE software for these timing differences.

    A BS2, BS2e, and BS2pe each have a 2us pulse unit duration which means that a 1500us(<-- Center servo position) would have a value of 750 where as a BS2sx, BS2p, and BS2px each have a 0.8us pulse unit duration. This means that to send a 1500us pulse, the PULSOUT value needs to be 1875.

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    Beau Schwabe

    IC Layout Engineer
    Parallax, Inc.
  • NWCCTVNWCCTV Posts: 3,629
    edited 2010-03-21 00:54
    Yes, I am aware of that. I have a BS2 and a BS2SX with seperate programs for each. I just wanted to make sure the settings etc, were the same. So 750 on the BS2 should be stopped, correct?
  • FranklinFranklin Posts: 4,747
    edited 2010-03-21 00:59
    On a standard servo there is no "stopped" Where ever you set it, it will go there and stop. 750 would be close to the middle of its travel.

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    - Stephen
  • W9GFOW9GFO Posts: 4,010
    edited 2010-03-21 05:09
    Futaba considers 1.520 mS to be the center value for their servos, which would be 760 for a BS2.

    Rich H

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    The Simple Servo Tester, a kit from Gadget Gangster.
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