Title:
METHOD OF CONTROLLING SYNCHRONIZED OPERATION OF A MACHINE TOOL
Document Type and Number:
WIPO Patent Application WO/1990/001829
Kind Code:
A1
Abstract:
A method of controlling synchronized operation of a machine tool and an apparatus therefor. In a machine tool having two main spindles (14, 15), a work (18) is gripped by the first spindle and the second spindle controlled by control circuits (19, 20) that include a speed control unit and a position control unit. When the work is to be machined under this condition, digital speed instructions are fed to the two spindles simultaneously from, for example, a numerical controller. On each of the main spindles, separation means (sw2) is controlled to separate the position control unit from the speed control unit, the synchronized operation mode is set to switch the speed instruction to the position instruction, and the digital speed instructions are processed as position instructions to carry out the same position control. Therefore, the running speed of the two main spindles are brought into synchronism with each other, and the work is separated into two without giving excess force to the work.
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Inventors:
KOHARI KATSUO (JP)
KONO SHINICHI (JP)
FUKUKURA MASAAKI (JP)
KONO SHINICHI (JP)
FUKUKURA MASAAKI (JP)
Application Number:
PCT/JP1989/000779
Publication Date:
February 22, 1990
Filing Date:
July 28, 1989
Export Citation:
Assignee:
FANUC LTD (JP)
International Classes:
G05B19/18; H02P5/50; H02P5/52; H02P5/54; (IPC1-7): H02P5/00
Foreign References:
| JPS51125817A | 1976-11-02 | |||
| JPS62245312A | 1987-10-26 |
Other References:
See also references of EP 0401375A1
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