Re: [CAD_CAM_EDM_DRO] speed determination was Re: faster steppers

>
> Alan,
>
> A flourescent light and a print of concentric circles with different
> sector ratios (black units vs. white units can get you close enough
> to interpolate the 'betweeners'. Remember the ne-2 glow of turntables
> and the "strobe pattern" around the disk?
>
> Hope this helps.
>
> Ballendo
>
> P.S. On one site (wedemyers? or a link from/to?) there's a little
> tach made of a dc motor from radio shack.
>
> --- In CAD_CAM_EDM_DRO@y..., Alan Marconett KM6VV <KM6VV@a...> wrote:
> > Hi Ian,
> >
> > OK, that sounds like a good way. Always wanted a tach. One could
> > attach a relective stripe and use a photo detector and PIC to figure
> > RPM. I need to get around to that (useful on mill too)!
> >
> > Alan KM6VV