５．Output Wave Form - Canon R-1SO Instruction Manual

５ ５ ５ ５ ． ． ． ． Output wave form
５．Output wave form
Encoder signal output
5-1
90°±10° 90°±10°
A-phase
A-phase
B-phase
B-phase
500～1250nsec 500～1250nsec
Z-phase Z-phase
Clockwise rotation
Counterclockwise rotation
ｌooking from shaft side.
ｌooking from shaft side.
【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.).
LD alarm signal output
5-2
LD Alarm
LD driving current is always monitored, and goes Low-level when the LD current
exceed 1.5 times at the time of the shipment.
7