| 摘要 |
The machine ( 20 ) comprises: a supporting structure ( 24, 26 ); a movable unit ( 28 ) mounted on the supporting structure ( 24, 26 ) so that it can translate along a first working direction (Z) and along a second direction (X) towards and away from a stationary workpiece-carrying structure ( 88 ); a tool-carrying unit ( 10, 11, 12 ) carried by the movable unit ( 28 ); and a driving system for controlling the movement of the movable unit ( 28 ) in the working direction (Z). The driving system includes a first motor unit ( 60 ) for controlling the rotation of a driving shaft ( 62 ) and a mechanism for converting the rotational movement of the shaft ( 62 ) into the translational movement of the movable unit ( 28 ). The motion conversion mechanism comprises a cam member ( 76 ), which is rotatably mounted on the movable unit ( 28 ) and the rotation of which is controlled by the driving shaft ( 62 ), and a roller member ( 78 ) which is rotatably mounted on the supporting structure ( 24, 26 ) and on which the cam member ( 76 ) rests. The cam member ( 76 ) has an outline ( 76 a) arranged to co-operate with the roller member ( 78 ), which is suitably shaped so as to cause the movable unit ( 28 ) to move along the working direction (Z) with a predetermined movement law upon rotation of the cam member ( 76 ).
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