When the datum(background,reference surface) tuning is performed, workpieces can be correctly detected.
・Received light pattern
Easy tuning Just by pressing the [SET] button with a target on a conveyor.
When performing the datum tuning (reference surface calibration)with a target on a conveyor (background), the values are set slightly above and slightly below the conveyor position. With no workpiece in place, the light waveform falls within this range -> [ Output OFF ]
The CMOS light receiving position changes -> The distance changes -> The workpiece is judged as present -> [ Output ON ]
2 peaks appear on the waveform -> The light receiving pattern changes -> The workpiece is judged as present -> [ Output ON ]
The light is not reflected properly -> The distance changes -> The workpiece is judged as present -> [ Output ON ]