David,
That's what I'm talking about!, thank you, I currently have something
like that card (probably yours is a better option). Still if I could
find a PC/104 version, it would be a lot better, if such thing doesn't
exist, I'll a have to stick to this last option or to something similar.
Kevin
--- In David <> wrote:
>
> Jonathan,
> You may want to look at the ssc32
> http://www.lynxmotion.com/Product.aspx?productID=395&CategoryID=52
> 32 channel servos controller that will work well on the 7300.
> David
>
> Jonathan wrote:
>
> > I think he means he wants to control hobby servos. Note these use a
> > different PWM protocol than raw duty cycle. Hobby servos listen for a
> > pulse that is between 1 and 2 usec long, sent at 30-60hz. The pulse
> > width controls servo position, so that 1.5usec is 50%. The xdio PWM
> > generates rectangle waves, so it won't work for that at all.
> >
> > You might be able to control a small number using the xdio pulse
> > generation, but for that many the best solution is an external serial
> > servo control board like that from Scott Edwards Electronics.
> >
> > Hope that helps.
> >
> > --- In <ts-7000%40yahoogroups.com>,
> > "PeterElliot" <egroups@> wrote:
> > >
> > > Hi,
> > >
> > > I'm assuming that you want to measure speed and direction on the 30
> > > servos. This would require 60 inputs (A & B), If you do an new FPGA
> > > load you could read 8 servos with the base 7300. 16 if you don't use
> > > the VGA output.
> > >
> > > I would therefore look at using a FPGA PC/104 card or interface a
> > > number of encoder ICs to the PC/104 bus. A further option would
be to
> > > sample the quadrature channels at high speed with a chip select for
> > > each encoder. if you could read the inputs fast enough you could get
> > > simultaneous sampling over a larger number of channels, but this
> > > would need a FPGA expert to work out.
> > >
> > > Regards,
> > >
> > > PJE
> > >
> > >
> > > --- In <ts-7000%40yahoogroups.com>,
> > "kvnherrera" <kvnherrera@> wrote:
> > > >
> > > > Hi there, I'm planing to use a 30 servos on a proyect, I would
like
> > > to
> > > > use the TS-7300 for that, but, in the datasheet, I saw that only
> > > pin 4
> > > > was PWM cappable, so, it seems like in a normal situation you can
> > > only
> > > > handle a couple of servos, but, still, I wanna know if there is
> > > > someone that tryed to use regular XDIO pins to achieve the
movement
> > > of
> > > > more servos with the FPGA, if that's your case, you're my
hero, and
> > > I
> > > > want to know how you did it, and how many servos you can handle...
> > > > anyway, if someone is sure that it can't be done, please tell me
> > > why,
> > > > so I can look for my options.
> > > >
> > > >
> > > > NOTE: English isn't my mother language, so excuse me if I made
some
> > > > grammar dopes
> > > >
> > >
> >
> >
>
>
> --
> David..........
> You have been on the computer to long when,
> You start tilting your head sideways to smile :-)
>
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