Patent ID: 7861594

Claim:
A method of operating a vibratory testing apparatus, the method comprising: providing a table frame with at least one vibrator attached thereto; attaching the at least one vibrator to a solenoid valve, wherein an input of the solenoid valve is connected to a pneumatic air supply and an output of the valve is connected to the at least one vibrator; connecting the solenoid valve to a controller; sending a first control signal from the controller to the solenoid valve for opening the valve and allowing a first burst of air from the pneumatic air supply to the at least one vibrator thereby causing the at least one vibrator to vibrate the table frame at a first amplitude; and sending a second control signal from the controller to the solenoid valve for opening the valve and allowing a second burst of air from the pneumatic air supply to the at least one vibrator thereby causing the at least one vibrator to vibrate the table frame at a second amplitude, wherein the first amplitude is independent of the second amplitude.