| 摘要 |
PROBLEM TO BE SOLVED: To correspond even to the sudden change of a drive speed by performing the control of a speed on the basis of the speed data which is obtained based on the correction position data from a rotary position detection means corrected by detecting the origin by an origin position detection means by a drive control means and controlling a stop position on the basis of the corrected position data. SOLUTION: The actual rotational speed of a rotation display device 11 is calculated by operating the count number of pulses counted by a counter 19 by a microcomputer 12 by utilizing the output of a pulse encoder 16. At this time, the counter 19 clears the counter number at each time of the passage of the origin, that is, at each time when the rotation display device 11 is rotated. When position data, that is, data showing whether the display part of the rotation display device 11 is stopped at a predetermined stop position is inputted to the microcomputer 12, the driving of the vibration wave motor 14 is stopped according to predetermined speed data corresponding to the count number per a unit time. |
