Epson FX Series Product Support

EPSON PRINTERS
Regulator Circuit
In
this circuit, the output (about 38\/) from the secondary side of the
transformer is input to the diode bridge DB1 in which It is full-wave
rectified. In this way, constant voltage outputs of + 24\/ and -»• SV are
obtained from the choppertype regulator IC1.
Carriage Motor Drive Sequence
The carriage drive motor in the printer mechanism, which uses a pulse
motor, permits the carriage to stop at an arbitrary position or to change
the print direction by control of acceleration or deceleration. Control is
achieve by comparing the time set by the firmware and the PTS signal,
detected when the carriage operates.
When driving the carriage from left to right
TABLE 1.3. CARRIAGE MOTOR STEP SEQUENCE (CW)
STEP A phase B phase C phase D phase
1
ON
OFF OFF
ON
2 ON OFF
ON
OFF
3
OFF
ON ON
OFF
4
OFF ON OFF ON
When driving the carriage from right to left
1-7
PRINCIPLES OF OPERATION
TABLE 1-4. CARRIAGE MOTOR STEP SEQUENCE (CCW)
STEP
A phase
B phase
C phase
D phase
1
ON
OFF ON
OFF
2
ON
OFF
OFF ON
3
OFF
ON
OFF ON
4
OFF
ON ON
OFF
In pica-si<« prtniing. approx 1 004 msec
_n n n
In eliie Site printing approx 1 57) msec
^
n n
In condensed size printing appro* 2.313 msec
n n
Fig. 1-11 Carriage Speed

Epson FX Series Specifications

General

Brand	Epson
Model	FX Series
Category	Printer
Language	English