On 30 December 2010 03:45, Don Stanley <[email protected]> wrote:

> I use the following Hal logic to maintain the spindle speed (S setting)
> and direction when in Hi or Low gear on my Bridgeport.
<snip>

That seems to replicate in HAL what the gearchange component does. I
am not entirely sure that that is what Igor needs, as he has no VFD to
take the PWM value.
Igor possibly needs a wcomp to operate the air valves on the variable
speed drive, and a mux or similar to swap the action when in
back-gear.

-- 
atp
"Torque wrenches are for the obedience of fools and the guidance of wise men"

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