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(11) Panel circuit board
LCD (Liquid Crystal Display)
40 digits x 2 lines (2-color selecting system)
Buzzer
Outputs signals of switches and high-speed rotation variable
resistor to CPU. Also used for inputting LED signals.
The membrance switch
signal is input.
1 CW pulse input signal
Inputs a signal to make the motor rotate clockwise (CW).
2 CCW pulse input signal
Inputs a signal to make the motor rotate counterclockwise (CCW).
3 Power-down input signal (PD)
If "H" level is input, the exciting current to the motor will be cut off.
4 Alarm output signal (AL)
If the protection network inside the driver actuates, an alarm signal will be transferred outside.
5 Motor drive output (MOTOR)
This output feeds the electric current to the motor.
6 Frame ground output (FG)
Connected to the frame ground of the control box.
7 100 Vac input (AC)
Supplies the power supply of 100 Vac ± 10 % (50 / 60 Hz) to the machine.
8 Power supply indicating LED (POWER, green)
Lights when the 100 Vac is supplied to the machine.
9 Phase origin monitor indicating LED (MON, green)
Lights up when the exciting phase is in the origin (the state at the time of turning ON the power to the machine). Under the HALF step
mode (0.36˚/pulse), the LED lights up once every 20 pulse.
SW signal is output to the CPU circuit board.
In addition, the LED and LCD signals are input.
The illuminance of the
LCD is adjusted.
The membrance switch
signal is input.
This area enters the signal of the slide switch
located at the side of the panel.
(12) Functions of the stepping motor driver
!3
1
8
9
2
!0
!1
3
!2
4
5
6
7
!0 Supply voltage drop indicating LED (P.E, red)
If the 100 Vac power supply drops to 85 Vac or lower, the protection network will actuate
to cut off the electric current to the motor coil. In this case, the LED lights up.
!1 Abnormal input indicating LED (O.F, red)
If a pulse of 1000 KPPS or more is input under the HALF step mode (0.36˚/pulse), the
protection network will actuate to cut off the electric current to the motor coil. In this
case,the LED lights up.
!2 Overheat display LED (O.H, red)
If the temperature inside the driver, including the ambient temperature, rises to 80˚C or
more, the protection network will actuate to cut off the elctric current to the motor coil. In
this case, the LED lights up.
!3 DIP switches
These switches are used for changing over the exciting method and automatic-current
down. For the ACF model of sewing machine, all of these switches should be set to the
ON position. (See the figure.)
Switch
98
−
−
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