Brian Scearce wrote:
>
> This matter is not PIC-specific, but I've seen so many people working
> with servos on this list that I thought it would not be unwelcome.
>
> The Futaba S3003 servos I bought didn't have any pulse width
> specifications with them.  The generic servo docs I've been able to
> track down suggest that the pulse should be 1-2ms wide.  Sure enough,
> the "long" pulse to turn the S3003 all the way to one side is about
> 2.3ms.  But the "short" pulse to turn the servo the other way is quite
> a bit shorter than 1ms, it's something like 270us.
>
> The guy at the R/C store who sold them to me didn't know the pulse
> width bounds, but he told me that the neutral position is "always"
> 1520us; I'm finding it's closer to 1290us.
>
> Does anyone have real specs for Futaba S3003 servos?
>
> Brian


Hi Brian,
         I recently posted some code up here for servo control using the futaba
servos and a 1-2 mSec pulse width.

        What you have to remember is that servos are only supposed to have a 90
Deg rotation. My Futaba servos rotate 90 Deg with the 1-2 mSec pulse
width variation.

        What you say about the neutral position is also true and this is why
most R/C control equipment has a trim option on it. I hope this helps a
little it frustrated me for a while also.

--

Cheers Peter ..........

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