| 摘要 |
A table system with angular position control means is disclosed in which an object supported on a table can be moved accurately over a tiny angle in circular direction to any desired position. The table is supported on a bed for rotation through a crossed-roller bearing. Position control means gets the table to turn over a tiny angle through an arm plate fastened to the table. A nut and screw set, when driven by a motor, causes a linear motion that is in line with a tangent of the table, and the linear motion is translated into a circular motion to turn the table in any circular direction by virtue of a combination of a first linear motion guide unit interposed between the bed and a carriage to control the linear motion in the tangential direction, a second bearing means interposed between the carriage and a turret means, and a second linear motion guide unit to control a linear motion in the direction that looks towards the center of the table.
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