Patent ID: 9468942
Filing Date: 2016-10-18
CPC Classification: B05B,G01F,G01R,Y10T

Claim Text:
1. A system for calibrating needle lift in a spray gun assembly, said spray gun assembly having an operating mechanism and a nozzle, said nozzle having an opening and a needle seat disposed about the inner surface of said nozzle opening, said operating mechanism having a solenoid, a stepping solenoid assembly, a needle and an actuator control system, said solenoid including a line conductor and an actuator member, said stepping solenoid assembly having a line conductor said actuator control system structured to control said stepping solenoid assembly to provide fine adjustment to said needle position, said solenoid and said stepping solenoid assembly having an initial configuration and a calibration configuration, said system for calibrating needle lift comprising: an actuator sensor structured to detect changes in the current in at least one actuator line conductor and to provide an output signal; a calibration module being executed in said actuator control system, said calibration module structured to receive said actuator sensor output signal; and said calibration module further structured to detect an identifiable anomaly in said sensor output signal, said identifiable anomaly indicative of said actuator member being in a known position.