Epson LX-86TM Especificações descarregar pdf (Página 59)

REV.-A

2.4.5.3 Carriage Motor Drive Circuit

Figure 2-22 shows the carriage motor drive circuit.

E05A03

R29

CRB

R30

CRC

R31

CRD

7b_D1843x4

+24 +5

3.3Kx4 ‘

(3B)

—

0--

Q-

-o-

3.3K

CPU

,—,

:RA

;RB

cRCOM

(2B)

Q19

B131

ciiCOM

EMO1 ZW

Fig. 2-22 Carriage Motor Drive Circuit

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:

7.5”

Number of steps per revolution:

48 steps

Number of phases:

Four

Excitation system and drive frequency:

Unipolar drive, 2-2 phase excitation system (480 PPS)

Drive voltage:

+24 VDC

Resistance per coil:

58 ohms

*7%

2-27

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