| 摘要 |
PURPOSE:To obtain stable detection accuracy for boards in various shapes always by providing a means which detects the existence of boards on a longitudinal line in a direction for the boards to be conveyed and counts its number of times, at each of a stand-by station and a mounting station, and confirming the passage of the boards by the coincidence of both counted values. CONSTITUTION:The arrival of a board 12 at the upstream end of a stand-by station from a board supply station on an upstream side is confirmed by a sensor S3, and its output is counted. Next the arrival of the board 12 at the downstream end of the stand-by station is confirmed by a sensor S1 and its output is counted, and whether or not the counted value is equal to that of the sensor S3 is judged. If it is equal, it means that the board 12 has passed the stand-by station completely. And after part-mounting to the board 12 on a mounting station is finished, a motor M2 is started, and the output of a sensor S2 is counted, and it is judged whether the counted value is equal to that of the sensor S1. If it is equal, it means that the board 12 has passed the sensor S2 completely. |
