SYNCHRONIZATION CONTROL OF SPINDLE MOTOR AND FEED MOTOR

When a main spindle (10) is rotated and the main spindle and a work are moved linearly and relative to each other in the axial direction (Z) of the main spindle in, for example, the threading of a machine tool, a spindle servo-motor (12) and a feed servo-motor (22) as the driving sources must be act...

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Main Authors KIMIJIMA, MASAMI FANUC DAI-3 VIRA-KARAMATSU, KONO, SHINICHI FANUC MANSION HARIMOMI 7-203, NUMAI, KAZUHISA FANUC DAI-3 VIRA-KARAMATSU, NAKAMURA, KOSEI
Format Patent
LanguageEnglish
French
German
Published 29.11.1995
Edition4
Subjects
CONTROL OR REGULATING SYSTEMS IN GENERAL
CONTROLLING
FUNCTIONAL ELEMENTS OF SUCH SYSTEMS
MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS
PHYSICS
REGULATING
SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
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Summary:When a main spindle (10) is rotated and the main spindle and a work are moved linearly and relative to each other in the axial direction (Z) of the main spindle in, for example, the threading of a machine tool, a spindle servo-motor (12) and a feed servo-motor (22) as the driving sources must be actuated while they are being synchronised. Generally, the spindle servo-motor drives directly the main spindle without resort to a reduction gear but the feed servo-motor drives a main spindle head (18) through reduction gears (26,28). Therefore, the synchronisation is governed by the acceleration/deceleration performance of the spindle servo-motor. The synchronisation with maximum efficiency can be accomplished by accelerating and decelerating the main spindle while actuating the spindle servo-motor in line with its torque limit curves (L1,L2).
Bibliography:Application Number: EP19880907772