Download Epson ActionPrinter 3000 - ActionPrinter-3000 Impact Printer Service manual

Principles of Operation
Paper feed motor specifications
Drive Voltage
Coil Resistance
Phase Excitation
Current
Driving Frequency
4-phase, 48pole stepper motor
24 VDC + 10%
58 ohms f 7% at 77O F (25O C)
2-2 phase excitation
1.1 A, maximum (rush current)
0.30 A, typical
Driving:
0.06 A 5 20 mA
Holding:
400 pulses per second
Paper feed motor drive circuit
Figure 2-43 shows the paper feed motor drive circuit. When the paper feed signal
PB2 goes LOW, Q27 goes on and supplies +24 V to the motor. When the paper
feed motor is not being driven (when it is in hold status), +5 V is supplied to the
motor via resistor R36 and diode Dll.
Figure 2-43. Paper Feed Motor Drive Circuit
LC&200/AP3000
2-45