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Paper feed motor drive circuit, Table 2-9. paper feed motor drive modes – Epson 4003353 User Manual

Page 49

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Manual

Operating Principles

2.3.2.4

Paper Feed Motor Drive Circuit

The paper feed motor for this printer drives the following mechanisms:

■

Paper feed mechanism

■

Paper pickup mechanism

■

Pump mechanism

Driver SLA7041MS

drives the paper feed motor by a constant current. The operation

principle is same as the carriage motor drive circuit. But the driving method is different for paper
feed and the pump.

Table 2-9. Paper Feed Motor Drive Modes

Mode

Phase Excitation

Drive Frequency

Paper feed

2-2 phase or 2WI -2 phase

391 or 1600

Pump drive

2-2 phase

300 or 1800

SLA7041 MS

PFSTB

41

44

A

P F V R F

●

A

14

54

●

B

PFHLD —

9

I

●

I

B

NPN Tr

E

1

1

8

2

11 3

18 4

5

+

—

Figure 2-23. Paper Feed Motor Drive Circuit Diagram

Rev. A

2-19

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