Servo Motor Shaft Encoder Douts

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raman00084

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in my panasonic servo motor there are three encoder outputs namely A , B , Z, If i connect cro i am getting square wave in a and b terminals but only noise in z. please explain about A B Z TERMINALS why i am not getting output in z?
 

The sign of phase difference between A,B indicate turning in clockwise or vise versa.You must see a pulse in Z every one round.If there is noise may your Z have not a pull up resistor.
 
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