One factor that should not be overlooked is the frame rate to the servo. Earlier you stated that it was 10 ms. You might want to check that is correct for the servo you are using. It was the source of a RC servo control problem that I tracked down in a
project.

w.


Padu wrote:

> Jan-Erik wrote:
> <snipped>
> > No, I'd take a closer look at whats actualy is sent out from
> > the PC.
>
> Humnn, I guess I could investigate this possibility by simply doing a PIC
> (by the way 4Mhz) program that goes from -60 to +60 at a given angular speed
> and remove the USART component from the equation for now. If you are
> correct, that should be smooth. I'll do that test and post the results
> later.
>
> Cheers,
>
> Padu
>
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