| 摘要 |
PURPOSE:To bore a printed circuit board using a drill with high accuracy by a method wherein the center of each mark printed on the board is precisely detected using an optical sensor. CONSTITUTION:Drilling marks 7 are printed on a printed circuit board 1, which is then fixed on an XY table 3 having a cavity 5 by holders 4. The centers of a drill 12 and a sensor 33 are set to align with the center line in a centeral part 6 of the XY table 3. The sensor 33 is of an optical type and adapted to accurately detect the center of each mark 7. The mark 7 is accurately detected by the sensor and the board is then bored by the drill 12. |
