Epson LX-86TM Dokumentacja Pobierz pdf (Strona 56)

REV.-A

2.4.5.2 Carriage Motor Control

The carriage motor control system is an open-loop system. There are two basic phase switching speeds:

450

PPS

(l-1 phase drive) and 900

PPS

(2-2 phase drive), as shown below. The phase switching is

performed according to the time data (time required to switch a phase) which is determined by the

firmware, for the number of counts determined by the firmware. Figure 2-19 shows the basic phase

switching patterns.

CRA

CRB

CRC

CRD

Carriage

Movement

Left

‘ight

Left

Direction

‘ight

(2-2 Phase Switching)

(l-1 Phase Switching)

Fig. 2-19. Basic Phase Switching Patterns

Constant Speed

speed

H.P.

H.P.S

~Printing

START

Area

STOP

-----

Drive

IMNv

----------------------

‘uLrLrl—

Hold

time

Fig. 2-20. Basic Operation Sequence

2-24

1 2 ... 51 52 53 54 55 56 57 58 59 60 61 ... 141 142

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Epson LX-86TM Dokumentacja Strona 56