| 摘要 |
The drilling machine (5) has a cross member (8) along which slide two carriages (18a, 18b) supporting two machining heads (17a, 17b); the two carriages (18a, 18b) are moved independently of each other along the X axis; one (17b) of the two machining heads is fitted to the respective carriage (18b) by means of a slide (38) which is also moved along the Y axis by an electric motor (44) controlled by a numeric-control unit (10); the maximum travel of the slide (38) is at least twice the pitch of the rows in the matrix of holes (35) in the printed circuit boards (16); and the movement off the slide (38) provides for both setting the two machining heads (17a, 17b) along the Y axis, and enabling the two machining heads (17a, 17b) to simultaneously drill two adjacent rows in the matrix of holes (35). <IMAGE> |
