Hi Gerald
The variable speed control of the 1 hp DC motor is controlled manually by the knob next to the E-stop button. Pushing in the E-stop button will turn off the spindle speed from a different wire leads than on the wiring diagram.
The digital readout was bought from http://www.mkctools.com/tachoptions.htm for $59.95. I made the enclosure from aluminum and mounted the sensor below the spindle motor pulley.
The wiring diagram and AC power layout below is for my TMC 1000 and may be different from yours. Use at your own risk.
Frank