Wild_Bill wrote:

The received wireless mouse signal (possibly only X or Y) would require some
sort of D/A conversion, would it not?
I dunno about the EMI-RFI issues.. someone here with a PC in their shop
could probably comment on that.

A tiny low voltage gearmotor to operate the variable current pot might work,
but you could likely do it with circuitry, handy as you are with electronic
stuff.

The motor idea just popped into my gourd as I was thinking about a
stabilized output variac I have, that operates by a small (non-digital)
circuit board and a small motor.

I'd temporarily forgotten about the rotating indicator's relationship to the
spindle.. thanks for the reminder.

--
WB

The generally accepted solution to eliminating the foot pedal cable is
to eliminate the foot pedal and use a torch mounted control, either a
variable control like the foot pedal, or a simple pushbutton when used
with a sequencer.

As for wireless links in the shop, I think it's workable in most cases.
Modulation methods, data rates and receiver sensitivity have improved
over the years and a data link these days can readily overcome the
variable RFI in a shop environment with redundancy and error correction.