Karl Townsend wrote:
On Fri, 10 Dec 2010 22:06:14 -0800, "Wayne C. Gramlich"
wrote:

A releated question...

What is the desired resolution required to support rigid tapping?
How many "ticks" per revolution?

-Wayne


I went with 500 ct, mainly cuase I found an AB unit on eBay cheap. Low
res. is best cause you need to read it at 5000 RPM.

I didn't worry about the backgear thing and put it on top by using an
expanding arrangment to clamp to the hollow spindle bore. Mine was
trick cause I needed the tool changer to still work. Iggy, as you're
not using a tool changer, this would be a piece of cake. I have a prox
sensor on the backgear switch to know which gear.

Jon's method on the spindle itself would be better, far more work to
install.

Can EMC2 keep up with 500ct at 5000rpm? I know tapping does not
occur at that speed.

-Wayne