Title:
CONTROL SYSTEM FOR DELAY ERROR CORRECTION OF SERVO SYSTEM IN NUMERICAL CONTROL
Document Type and Number:
Japanese Patent JPS59194206
Kind Code:
A
Abstract:
PURPOSE:To reduce an error in a work shape due to servo delay by inputting outputs of respective axes from a pulse distributor to a servo system through a specific correcting means. CONSTITUTION:A movement command from an NC tape 1 is decoded by a command program decoding part 2, whose output is sent to servo systems 5 and 6 for respective axes through a feed speed control part 4 and the pulse distributor 3. The servo systems 5 and 6 control the positions and speeds of servomotors 11 and 12 through servo position control parts 7 and 9 and servo speed control parts 8 and 10 on the basis of the difference between the current value and last command value from position detectors 14 and 16 of a machine. When transfer functions of the servo systems 5 and 6 are represented as G(S), elements which have its reciprocal 1/G(S)=H(S) as transfer functions are provided between the pulse distributor 3 and servo systems 5 and 6 as servo delay error correcting elements 20 and 21.
Inventors:
KAWAMURA HIDEAKI
SASAKI TAKAO
SASAKI TAKAO
Application Number:
JP6838783A
Publication Date:
November 05, 1984
Filing Date:
April 20, 1983
Export Citation:
Assignee:
FANUC LTD
International Classes:
G05B11/36; G05B19/18; G05B19/19; G05B19/404; (IPC1-7): G05B11/36
Domestic Patent References:
| JPS55146505A | 1980-11-14 |
Attorney, Agent or Firm:
Takemoto Matsushi