Electricity: motive power systems – Positional servo systems – With particular motor control system responsive to the...
Patent
1990-02-27
1991-01-29
Ro, Bentsu
Electricity: motive power systems
Positional servo systems
With particular motor control system responsive to the...
318 41, 318 61, 318 77, 318 85, 318603, G05B 1106, H02P 774, B24B 4700
Patent
active
049889370
ABSTRACT:
A synchronous control system for a pair of spindles of a machine tool including a master spindle and a slave spindle. Current positions of the main spindles are detected, and a deviation between the detected current positions is calculated. In case the deviation is within 180 degrees, the current position of one of the main spindles which precedes in the forward direction of rotation is determined as a target position for positioning. In case the deviation is greater than 180 degrees, the detected current position of the master spindle or the slave spindle is offset by an amount equal to an integral number of times 180 degrees so that the deviation between current positions of the main spindles after such offset is within 180 degrees. Then, that one of the current position of the main spindle thus offset and the current position of the other main spindle not offset which precedes in the forward direction of rotation is determined as a common target position for positioning. When a positioning instruction is provided by an operator, the main spindle which follows in the forward direction of rotation is controlled so that the position of rotation of the following main spindle approaches the target position.
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Nakano Hiroshi
Yoneda Takao
Yonezu Toshihiro
Ro Bentsu
Toyoda Koki Kabushiki Kaisha
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