| 摘要 |
PURPOSE:To achieve a high-accuracy fitting by correcting mispositioning of a pad with respect to a lead which is detected by a laser reflection light and fitting an electronic part to a printed circuit board. CONSTITUTION:Sensors 7 and 9 measure a center of a joint with a pad of a lead 3 and sensors 8 and 10 measure a portion near an edge portion of the pad 4. Scanning is made along an array of the lead 3 while a laser beam is projected to an object from sensors 7-10 and a height and a position in horizontal direction of the lead 3 and the pad 4 are detected by detecting the laser reflection light during scanning. Then, mispositioning between the height and the position in horizontal direction is corrected and an electronic part 1 is mounted on a printed circuit board 5, thus enabling the electronic part 1 with small lead pitches to be fitted to the printed circuit board 5 with a high accuracy. |
