Re: Fwd: pulse train

[Scot Rogers <scotr-at-bogwell.com>]

On Monday 16 December 2002 03:25 pm, you wrote:


My plan was to use Gecko 201's and some 350 oz.in. Slo-syn steppers that I 
have.  The steppers are 4 wire, will that make a difference on the speed of 
the motors?  Mostly I asked the orginal question to get a rough idea of the 
possible rapids I can expect.  Now that I know a bit more, I can see that 
it's a bit more complex.  Thanks for the input and thanks to Ray too.  I 
still have loads to learn about this process.

Scot


> Hi Scot
>
> Running a few tests with the latest CVS sources on the Athlon 1800,
> achieved around 60KHz - 12500 steps per inch at 300 ipm. With a little bit
> more tuning, I'd imagine this could go higher. At these frequencies,
> interrupt latencies have a significant effect on the stability of the
> output - The read /write timings of the parallel port may also limit the
> theoretical maximum frequency.
>
> Ultimately, it will be the stepper motors and drive electronics that will
> determine the maximum usable frequency.
>
> Regards, Paul.
>
> On Monday 16 Dec 2002 12:11 am, Paul wrote:
> > An Athlon 1800
> > ran at ~7uSec (71500Hz pulse rate), but this left precious little time to
> > do anything else.