Rotational positioning device
OwnerHiroshi Teramachiinventor
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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.
Claims4
A rotational positioning device, comprising a rotary table for supporting a work piece ;
- a servo motor including a rotor which secures said rotary table ;
- a rotational angle detecting means for detecting the rotational position of said rotary table, wherein said rotational angle detecting means has a first portion coupled to said rotor and a second portion having a detector which detects a mark on said first portion;
- and a brake
- means for braking the rotation of said rotary table, wherein said servo motor, said rotational angle detecting means, and said brake means are accommodated in a casing.
A rotational positioning device, comprising a rotary table for supporting a work piece;
- a servo motor including a rotor which secures said rotary table;
- a rotational angle detecting means for detecting the rotational position of said rotary table, wherein said rotational angle detecting means is an encoder which comprises a light shielding board secured to said rotor of said servo motor and an optical sensor for optically detecting a mark on said light shielding board;
- and a brake means for braking the rotation of said rotary table, wherein said servo motor, said rotational angle detecting means, and said brake means are accommodated in a casing.
Dependencies are inferred from the claim text.