NPM AD1431 User Manual page 8

Stepper Motor Driver AD1431
*3 EORG photocoupler ON/OFF condition in the following excitation methods
The EORG photocoupler turns ON in the initial excitation condition (Both A and B phases excitation
are the same with those of the initial location.).
The timing in each excitation method is as follows.
In the 2 phase excitation, the initial excitation is that A phase wire : 100% and B phase wire : -100%.
The EORG outout photocouplar turns ON once every 4 input pulses.
2 phase excitation
制御電源ON
Control power ON
2相励磁
Input pulse 入力パルス
EORG(-)
(%)
100
A相
A phase 0
-100
100
B phase B相
0
-100
In the 1-2 phase excitation, the initial excitation is that A phase wire : 100% and B phase wire : 0%.
The EORG outout photocouplar turns ON once every 8 input pulses.
1-2 phase excitation
制御電源ON
2
1-2相励磁 Control power ON
入力パルス
Input pulse
EORG(-)
(%)
100
A相
A phase
-100
100
B phase B相
-100
- 6 -
0
0
YA7179-1/2
+5V +5V
CLK(+)
OFF
CLK(-)
ON
OFF
EORG(+)
ON
EORG(-)
AD1431側
AD1431
OFF
ON
OFF
ON