| 摘要 |
PROBLEM TO BE SOLVED: To provide a battery-less multi-rotational absolute value encoder having high reliability in long life. SOLUTION: In the multi-rotational absolute value encoder provided with a first absolute value encoder 1 provided on a rotary shaft 11 to be detected, a speed reducer 3 provided on the rotary shaft to be detected, and a second absolute value encoder 2, the speed reducer 3 has a sun gear provided on the rotary shaft to be detected, a plurality of planet gears arranged on the circumference of the sun gear, and an inner gear engaged with the planet gear.
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