Miller DDSC is a dual schedule control designed for use with a digital control and feeder, digital voltage control, and constant potential welding power source. It allows the operator to use one set of voltage and wire speed controls for one schedule and a second set of controls for a second schedule, which can be selected using the schedule selector switch on the gun.

The DDSC features a ten-turn voltage control for adjusting output load voltage and a ten-turn wire speed control for setting the rate of wire feed. It also has a press-to-set button that must be depressed when setting either the voltage or wire speed for the second schedule. A pilot light indicates when the unit is energized during the second schedule.