With a Datum Algorithm, the reference surface is noted in order to stably detect workpieces. This algorithm is based on distance and received light pattern.
・Received light pattern
Easy tuning by simply pressing the [SET] button with and without a target present.
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 ]