(2) Drive Pulse Input（Cw, Ccw - Melec GDB-5K40 Instruction Manual

(2) Drive pulse input（CW, CCW）
① Operating current range : 5mA〜14mA
The photo‑coupler turns on with
inter‑terminal voltage of 3.1V〜5.5V.
(Photo‑coupler diode V
② Timing chart
1/
t1，t2，tf，tr，t3，t4
Divisions
1/1,1/2 t1≧5μs，t2≧5μs，tf,tr≦1μs，t3≧10μs，t4＞10μs
Other setting t1≧0.5μs，t2≧0.5μs，tf,tr≦1μs，t3≧1μs，t4＞1μs
● The shaded area ( ) indicates light emission from the photo‑coupler,
and the motor is driven at the rising edge ( ↗).
"t4" greatly varies according to the inertial moment including that of the motor.
③ Automatic switching for DRIVE/HOLD
CWP
CCWP
Motor
HOLD
current
t1≒ 16ms (HOLD SWITCHING TIME SELECT switch : ON ・DH2)
t1≒150ms (HOLD SWITCHING TIME SELECT switch : OFF・DH1)
● Inputting drive pulse causes the current output to the motor to change from
HOLD CURRENT to DRIVE CURRENT, which returns to HOLD CURRENT in about "t1".
DRIVE CURRENT continues if pulse is input on driving‑state.
④ Direction of rotation
≒ 1.5V)
F
DRIVE
t1
CCW
CW(Clockwise)
‑37‑
Instructions Manual
DRIVER
(J1)
CW+
300Ω
1
CW‑
2
CCW+
3 300Ω
CCW‑
4
[To the line driver 26LS31］
Maximum response frequency
(at 50% duty)
100kHz
1MHz
HOLD
GDB-5K40
R2
Photo‑coupler
Photo‑coupler