Title:
FAILURE DETECTOR FOR SERVO SYSTEM
Document Type and Number:
Japanese Patent JPS58139201
Kind Code:
A
Abstract:
PURPOSE:To improve the reliability of blocking function, by stopping a drive motor urgently when a deviation between a relative rotating angle detected value of an encoder and an absolute rotating angle detected value of a potentiometer exceeds a permissible value. CONSTITUTION:A counter 20 is reset when an arm is in the reference attitude, counts a pulse train 100 from an encoder 18 when the rotation is started and outputs a relative rotating angle detection value 102. An analog detection value 116 of the absolute rotating angle of a drive motor 10 detected at a potentiometer 38 is taken as the absolute rotating angle detection digital value 114 at an AD converter 40. The two detection values are inputted to a comparator 42, an open instruction 110 and a close instruction 112 are outputted to contacts 32, 34 when the deviation 118 exceeds a permissible value 109, to stop the motor 10 and to activate a brake 36. Thus, the servo failure blocking function is improved.
Inventors:
KUNO TOSHITAKA
MORIBE HIROSHI
MIYAMOTO SHIYOUJIROU
MORIBE HIROSHI
MIYAMOTO SHIYOUJIROU
Application Number:
JP2180482A
Publication Date:
August 18, 1983
Filing Date:
February 12, 1982
Export Citation:
Assignee:
TOYODA CHUO KENKYUSHO KK
International Classes:
G05B9/02; G05B19/23; H02P29/00; (IPC1-7): H02P5/00
Domestic Patent References:
| JPS5528084A | 1980-02-28 |
Attorney, Agent or Firm:
Atsushi Nakajima