Control feed speed with a potentiometer

Hello,

i want to control the feed speed with a potentiometer on a 7i96s mesacard.

i dont know how to do that. 
Can anybody explain me, what i have to do?

Thanks in advance.

you probably could add a 7i84 to get a few analog inputs, then link them in the Hal to feed override. you would have to hook it up to the serial port on your 7i96s. there would be a lot to consider for the HAL, but think there some math components that should work, would want a 36v power supply to use the full scale

A 7I73 will work as well (and is 3.3V full scale)