Re: [CAD_CAM_EDM_DRO] r.p.m. kit??? / 4 digit under $20

If you use a pulse generator that gives 6 pulses per rev, then all you have
to do is shift the decimal point one place to the right, rather than
multiplying by 60. Use a 60PPR encoder, and it reads directly in RPM.

If you happen to have a multimeter with a Hz range (lots of the higher end
meters do), then you can hook the meter up to display RPM in the same way. See:

http://www.jeffree.co.uk/Pages/speedmeasurement.html

for details.

Regards,
Tony

At 20:59 04/01/2003 -0800, you wrote:

>Thanks, Doug. By including a sensor p/n or
>description to the description would be helpful if
>it was planned to sell it for that use.
>
> >
> > The above circuit card has 5 'personalities' it can be ordered
> > with.... as I mentioned you want the 40KHz autoranging version.
> >
> > Thus the circuit measures and displays counts/second which
> > equals revs/sec if there is one count/rev.
> >
> > If you want rpm, I guess you have to multiply by 60 in your
> > head (ie a display of 50 indicates 3000 rpm).
> >
> > However, I've contacted Frank (the manufacturer in Australia)
> > before, he is very accomodating. I'll ask if he wants to put
> > together a 'rpm display' version vs the available 'rps display'.
> >
> > regards
> > Doug Fortune
> > http://www.cncKITS.com
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > .
> >
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>http://groups.yahoo.com/group/jobshophomeshop I consider this to be a
>sister site to the CCED group, as many of the same members are there, for
>OT subjects, that are not allowed on the CCED list.
>
>NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING
>THEM. DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
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Regards,
Tony