| 摘要 |
PURPOSE:To enable information read-out of high speed to be made by having a means of driving a motor according to the difference between the current address and assigned address. CONSTITUTION:When the inputs (d), (e) from a rotary encoder 6 are out of ranges V1 thru V2 by threshold voltages V1, V2, i.e., when the vibrations in the stop state of a motor 1 are large and the motor 1 is out of the stop position permissible errors, the output (f) becomes low potential. This window comparator 8 actuates when the motor 1 becomes of the stop state and while the motor 1 is revolving, the output (f) is kept at a low potential. Here, the beedback resistance of a motor drive circuit 5 becomes small as it is changed over from one resistance 52 to two parallel resistances 52, 53. Its gain G2 S becomes small and the servo system stabilizes. The motor 1 attenuates its driving voltage and stops vibrating. |
