Rotational positioning device
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United States of America Patent
Stats
-
Feb 13, 1990
Grant Date -
N/A
app pub date -
Nov 9, 1988
filing date -
Nov 10, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A rotational positioning device of this invention comprises a rotary table for supporting a work, a servo motor including a rotor which secures the rotary table, a rotational angle detecting means for detecting the rotational position of the rotary table, and a brake mechamism for braking the rotation of the rotary table. The servo motor, rotational angle detecting means, and brake mechanism are accommodated in a casing. The rotary table is directly driven by the servo motor without intervention of a speed reducer. Accordingly, the device is small in size and easy to handle, is capable of high-speed rotational positioning and very accurate positioning, and provides a high degree of safety because the brake mechanism is built in.
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