7
５．
Output wave form
5-1
Encoder signal output
【Note】
Z phase is not synchronized with A phase or B phase
Z phase rising edge
is the same position both in Clockwise and in
Counterclockwise rotation.
The Z-phase output is one pulse per rotation. As the
pulse width is narrow, use the "peak detection" mode of oscilloscope for
monitoring the Z-phase signal.
The pulse width of the Z-phase is 500 – 1250 nsec. In case the receiving IC needs
a wider pulse width, increase the width using a one-shot multi-vibrator (74 LS221
etc.).
5-2
LD alarm signal output
LD driving current is always monitored, and goes Low-level when the LD current
exceed 1.5 times at the time of the shipment.
５
５
５
５ ．
．
．
．
Output wave form
A-phase
B-phase
Z-phase
A-phase
B-phase
500～1250nsec
90°±10°
Clockwise rotation
ｌ
ooking from shaft side.
LD Alarm
Counterclockwise rotation
ｌ
ooking from shaft side.
Z-phase
90°±10°
500～1250nsec
