Title:
BACKLASH CORRECTION DEVICE AND NUMERICAL CONTROL SYSTEM
Document Type and Number:
Japanese Patent JP3703664
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To correct a backlash error by reducing the backlash error showing the increasing characteristic down to a fixed level or lower regardless of a relative feeding speed and according to the backlash information.
SOLUTION: When the increase/decrease direction of a position command signal is inverted, a motor inversion detection part 8 outputs a step signal of positive or negative value '1'. A backlash gain correction part 9 multiplies the step signal by the coordinate conversion value of the largest backlash error value that is previously measured. A time dependent filter 10 reduces the value of the corrected step signal at a level rate that is accordant with the time elapsed after the increas/decrease direction of the position command signal is inverted and outputs the reduced step signal as a position correction signal (backlash information). A backlash adder 11 adds the position correction signal to the position command signal and outputs a correction position command signal. Thus, the backlash error increasing at a fixed rate can be reduced down to a fixed level or lower regardless of a relative feeding speed and according to the backlash information.
Inventors:
Hiroshi Sugie
Application Number:
JP31858899A
Publication Date:
October 05, 2005
Filing Date:
November 09, 1999
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
G05B11/01; G05B19/404; G05B19/408; G05D23/275; (IPC1-7): G05B19/404
Domestic Patent References:
| JP9320076A | ||||
| JP667716A | ||||
| JP9120301A | ||||
| JP56114424A | ||||
| JP8211943A | ||||
| JP887330A | ||||
| JP670567A | ||||
| JP63196495A | ||||
| JP5914441A |
Attorney, Agent or Firm:
Hiroaki Tazawa
Konobu Kato
Konobu Kato