Sharp DV-500D Technical Manual page 29

5-3 Loading Motor Control
To move the TRAYMECHA position, control the loading motor driver IC with the 2 control signal
output.
LOAD + Loading motor is running forward
LOAD – Loading motor is running in reverse
Output is made following the logic listed below:
Loading Condition
Loading Halt
Loading Running Forward
Loading Running in Reverse
Loading Brake
However, the following high and low-speed modes are to be adopted in good command.
(1) High-speed mode
Constant drive (Forward output is "H" while running forward. Reverse output is "H" while
running in reverse.)
(2) Low-speed mode
Execute output while setting rotation output (forward and reverse) and stop output as a pulse
condition, then rotate it under low-speed motor.
The pulse cycle is set to be 14m/sec for rotation output and 6m/sec for stop output.
Forward Rotation Output
5-4 Tray 1 Insert Action
While Tray 1 is "close", start the Tray 1 discharge action via key operation. Start the loading motor
with high-speed mode for reverse rotation, then change it to low-speed mode for reverse rotation
1.2 second after the detection of the rise of SW2A. g:then, move it to the Tray 1 "open" position.
If the discharge action is not completed in 6 seconds, it stops once and begins reverse insert action.
5-5 Tray 1 Discharge Action
While Tray 1 is "open", start the Tray 1 insert action via key operation or by detecting SW2B input
rise. Start the loading motor with high-speed mode for forward rotation, then change it to low-
speed mode for forward rotation 1.2 second after the detection of the rise of SW2B. Then, move
it to the Tray 1 "close" position.
If the insert action is not completed in 6 seconds, it stops once and begins reverse discharge action.
Output Signal
Loading Running Forward
14msec
6msec
L
H
L
H
14msec 14msec
6msec 6msec
29
Loading Running in Reverse
L
L
H
H
.....
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