| 摘要 |
<p>PROBLEM TO BE SOLVED: To enable a drive characteristic of an ultrasonic motor to be stably maintained.SOLUTION: A positioning device 1 comprises: a base 2; a movement part 3 that is movably attached to the base 2; ultrasonic motors 41x and 41y that are attached to the base 2, and generate an ultrasonic oscillation to thereby move the movement part 3 relatively to the base 2; and a movement control unit 303 that actuates the ultrasonic motors 41x and 41y to thereby move the movement part 3 relatively to the base 2, and repeatedly perform a positioning operation of sequentially positioning the movement part 3 at a plurality of setting positions. The movement control unit 303 is configured to relatively move the movement part 3 to the base 2 so as to pass at least one of a first outside setting position in which a separation distance among the setting positions is maximum and a second outside setting position therein, out of the plurality of setting positions.</p> |
