Carriage Motor Drive Circuit; Paper Feed Motor - Epson LX-HOO Technical Manual

2.4.5.3 Carriage Motor Drive Circuit

Figure 2-22 shows the carriage motor drive circuit.
CRC
(3B)
CPU
(2B)
The carriage motor drive circuit is a constant voltage switching circuit (unipolar drive). When output
CR of the E05A03 is HIGH, the voltage is applied to the coil of the motor. When PAO of the CPU is HIGH,
the +24 V is applied to CRCOM (drive mode). When it is LOW, +5 V is applied to CRCOM (holding
mode).

2.4.6 Paper Feed Motor

This section describes the sensor circuit, an outline of the firmware, and the drive circuit, which are
used to control the paper feed motor. The specifications of the paper feed motor are as follows:
Angle per step:
Number of steps per revolution:
Number of phases:
Excitation system and drive frequency:
Drive voltage:
Resistance per coil:
I
R29
6
5
4
3.3Kx4 '
+ 2 4
R2
3.3K
1
Fig. 2-22 Carriage Motor Drive Circuit
N5
—
0--
6
Q -
2
5
-o-
1
+ 5
A
3
EMO1 ZW 4
7.5"
48 steps
Four
+24 VDC
58 ohms *7%
2-27
REV.-A