| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that the jitter caused by vibration is observed, for example, accompanied by the start or reversal of movement when the moving direction of matter is observed by an optical encoder. SOLUTION: The edge detection signal from a rotary encoder is counted by normal rotation and reversal counters 1, 2 and, for example, even if a reversal signal is received by the counter 2, the reversal signal is not reflected to the state of an RS flip-flop 6 immediately. As a result of comparison by a comparator 4, when a signal is accumulated in the counter 2 to a certain degree to exceed the value set to a set value programming element 7, a set signal is outputted to the flip-flop 6 for the first time.
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