| 摘要 |
A rotational position detection encoder includes at least two detection heads located along a slit string of a code plate. The detection signals of one of the detection heads are processed to generate a plurality of phase offset signals having successively differing phases with respect to each other. The phase offset signals are compared with the detection signals of another of the detection heads, and the phase offset signals having a phase closest to that of the detection signals of the other detection head are selected and added to the detection signals of the other detection head. As such, detection signals having conforming phases are obtained without minute positional adjustment of the detection heads.
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