Damn Grant,

Jeez I should start selling the one I built. Guess thats the best part of
being a programmer, I took a $5 surplus LCD display, $1 halleffect
transducer, and a $2 PIC (that's an embedded micro for those of you who
don't know) added an afternoon of programming and ... presto.. Instant tach,
mine's even got a switch for backgear on my Bridgeport that divides the tach
by 8.25 :-) and has several other nice features also (too complictaed to
explain in in a post)

One of these days I'm gonna add a pickoff from the the scales on my DRO so
the SFPM is really what the tool is seeing when under powerfeed and not just
the calculated value of diameter and RPM..

Dave

I still like the deal on the little electronic box that reads out rpm or
sfpm (you can enter the work or cutter diameter) and costs under $100. Now
*that*s a deal I like. Only place I know where to get 'em is
www.mkctool.com which is Skip's page, he's a Shopsmith guy. - GWE