R.P.M Lathe meter mod.

[tonyfoale]

I like tachometers in lathes, even more on a varispeed mill. My lathe is geared, RPM is assured with voltage. Does the tach monitor spindle or motor, and indicate when cuts bog down?

Here is one that I got, UK eBay but I am sure that the US eBay has them too. I was going to make my own but at that price that would have been folly beyond imagination. ebay tacho

Here is a pic from the listing

You need no knowledge of electronics, it will measure the rpm of whatever device you put the pickup on.