Patent ID: 6265017
Filing Date: 2001-07-24
Classification: B05B,B23K,H05K

Abstract:
A method of controlling the application of a coating material to a substrate having a leading edge, a trailing edge, and an unknown length; said method comprising the steps of:determining a distance from a sensor to a spray nozzle of a spray gun; the sensor sensing the substrate leading edge and trailing edge as the substrate moves past the sensor;conveying the substrate on a conveyor toward and past the sensor and spray nozzle during a spraying application;outputting encoder pulse signals from a pulse encoder corresponding to the distance of travel of the conveyor;outputting from the sensor a length signal corresponding to the distance between the leading edge and the trailing edge of the substrate;outputting from a controller a sequence of trigger signals in response to said sensor signal for turning the spray gun on for a selected period of time after the leading edge of the substrate moves a first distance and every time the substrate travels a distance corresponding to a predetermined number of encoder pulse signals counted from when the spray gun is initially turned on.