Positioning device

Abstract

Abstract PURPOSE:To prevent self-oscillating vibrations and perform highly stable positioning, by providing a circuit which detects a deviation from a target value of output displacement and another circuit which delays the output signal of the circuit for a fixed time and reducing a speed loop gain by means of an operation complete signal. CONSTITUTION:A digital target value 21 is connected to an up-down counter 7 which is operated by a positional pulse signal 27 and the deviation signal of the output of the counter 7 is inputted into a motor 2 through a DA converter 8, log amplifier 9, and power amplifier 1. Under this condition, a speed feedback signal 29 is supplied to the input side of the power amplifier 1 and the positional pulse signal 27 is also supplied to the input side through a speed pulse generating circuit 6 and gain reducing circuit 11. The circuit 11 is operated by means of an operation complete signal 25 which is the output signal of a delay circuit 13 of a time Td which is actuated by signals 23 and 24 outputted through a deviation detecting circuit 12. By reducing a speed loop gain by means of the signal 25, self-oscillating vibrations caused by a speed pulse can be prevented from occurring.

Inventors

• 👤 Motoo Uno
• 👤 宇野　元雄
• 👤 Hirotake Yamagata
• 👤 山形　博健

Bibliographic Details