The 2D Matrix Verification System uses a PC application and a camera to verify that each label printed on a part is of a readable quality and contains the proper code. For labels that do not pass inspection, the part will be blown off of the line and into a holding tray.

Before parts are introduced to the system for verification, the PC application must know the expected Print Code. The operator uses a button on the Production screen to open a window to enter the code to be printed on the label.

The system is now ready to inspect parts. As an option, the system can be configured to broadcast the code serially from the PC application to a printer.

The Inspection sequence begins when a part passes the “Trigger” photo-eye. The photo-eye is wired to an input card, and signals an Inspection Trigger to the PC application. The PC application uses a digital output to the camera to begin the inspection, and prepares to receive the result of the inspection.

After an Inspection Trigger has been received by the camera, it begins capturing images and attempting to decode the label.

Upon completion, it outputs a result serially to the PC application. The PC application monitors the result of the inspection.

A failed inspection will actuate the blow-off solenoid to remove the bad-coded part from the line. The PC application then uses the two other photo-eyes (wired to inputs) to verify that the part has left the inspection zone by the proper path.

The PC application also keeps track of the number of labels inspected and the results. This information is kept for both the current production run, and historically.

This design has been featured in MACHINE DESIGN