A programmable interface module includes a linear power regulator to control and provide power to interfaced components on an as needed basis. The optical beam is again irradiated on a predetermined portion of the new powder layer to form another sintered layer that has been united with the underlying sintered layer. The main frame pivot axis is transverse to the longitudinal centerline of the prime mover. Each slave device determines if the \u2018distance to target device\u2019 value indicates that it is the target.