| 摘要 |
<p>An incremental encoder has a rotor provided with a plurality of indices and is capable of detecting a reference point or a zero point without turning the rotor one full turn. Graduation lines of a main scale are counted until a detecting means detects an index I1 and the next index I2, the angle or the distance between the reference point and the index I2 is determined on the basis of the counted number of graduation lines of the main scale, the angle or the distance between the position of the index I2 and an optional position is determined on the basis of the corresponding number of graduation lines of the main scale, and the angle or the distance between the reference point and the optional position is determined by adding the angle or the distance between the reference point and the position of the index I2 to the angle of the distance between the position of the index I2 and the optional position. <IMAGE></p> |
