Title:
AXIAL FORCE CONTROLLER FOR HEADSTOCK OF LATHE AND OPERATION CONTROL METHOD
Document Type and Number:
Japanese Patent JP2670955
Kind Code:
B2
Abstract:
PURPOSE: To provide a technical means that is able to detect the extent of axial force acting on a spindle at the traveling side by means of only the program manipulation of a numerical control system in a highly accurate manner at the time of giving axial force to a work for a contact check between the work and the spindle in time of holding the work and prevention against chattering and, what is more, utilizable even for detection of separation of the work at the time of cutting-off operation.
CONSTITUTION: In an axial force controller equipped with a servo unit 11 controlling a headstock feed motor 5 on the basis of a position command (a) and a position feedback signal (b) and a maximum current setting means 17 setting a maximum current value to be given to the motor 5, a positional deviation (c) or differential signal between the position command (a) and the position feedback signal (b) is detected, comparing it with a setting value (d), and various control actions are performed on the basis of a control output (e) being generated at a time when a detected value (c) is reached to the setting value (d).
Inventors:
Okuno Naoki
Application Number:
JP36005392A
Publication Date:
October 29, 1997
Filing Date:
December 28, 1992
Export Citation:
Assignee:
Nakamura Tome Precision Industry Co., Ltd.
International Classes:
B23B3/30; B23B15/00; B23Q15/12; B23Q15/24; B23Q17/00; B23Q17/09; B23Q17/22; (IPC1-7): B23Q15/24; B23B3/30; B23B15/00; B23Q17/09; B23Q17/22
Domestic Patent References:
| JP6416301A | ||||
| JP288101A | ||||
| JP3287301A | ||||
| JP248U |
Attorney, Agent or Firm:
Takao Nishi