Do you need to change the fro on the fly? If not you can type in the feedrate on the MDI page. Or just drag the slider. Disregard this if you need a pendant type of feed control. Then a modbus is the best way to go. Check the links page. HOMANN does a nifty modbus. I can do a simple feedrate only using a small pincount PIC MICRO. If you have access to programmer for PIC MiCRO's, let me know. If not, I can burn a chip, send it as a kit. That's the cheapest way.
Whacko