Skip-Over-Perforation; Interface Specifications; Tear Off; Auto Line Feed - Epson LQ-1070 Product Information Manual

Input buffer capacity
The printer stores print data sent from your computer in its input
buffer. Keep DIP switch 1-7 off to select an BKbyte buffer.

Skip-over-perforation

Turning DIP switch 1-8 on when you are using continuous paper
enables the skipover-perforation function Use this function to leave
a l-inch (25.~mm) margin between the last printable line on one
page and the first printable line on the next page. This causes the
printer to skip over the perforation between continuous sheets.
Most application programs take care of the top and bottom margins.
Do not turn on skipover-perforation unless your program does not
provide these margins.
Adjust your topof-form position with the
half of the margin at the bottom of one page and half at the top of the
next page.
Continuous paper page length
When you are printing on continuous paper, DIP switches 2-l and
2-2 let you select from the four page lengths described in DIP-switch
Table 5.

Tear off

When you turn DIP switch 2-3 on, the tear-off feature is automatic
when using continuous paper. The printer automatically advances
the last printed page to the tear-off position. You can then easily tear
off the printed paper.
The printer automatically returns the paper to the loading position
when it receives more print data. You can also return the paper to the
loading position by pressing the
button
Use the tear-off feature only with continuous paper loaded with the
push tractor. Do not use the tear-off feature with the pull tractor.

Auto line feed

When auto line feed is on (DIP switch 2-4 on), the printer
accompanies each carriage-return code (CR) received with a linefeed
code (LF).
lf your printer is double spacing, turn DIP switch 2-4 off. If each line
overprints the next, turn DIP switch 2-4 on

Interface Specifications

Your printer is equipped with a parallel interface.

Specifications and pin assignments

The built-in parallel interface has the following characteristics:
p a r a l l e l
STROBE pulse
Handshake timing: BUSY and ACKNLG signal
Signal level:
Connector:
or equivalent
24-Pin Printers
MICRO FEED
buttons to get
TEAR OFF
button or the
Connector pin assignments and a description of their respective
interface signals are shown in the following table.
Signal ' Return
Signal
1 STROBE 1 IN
20
4
5 23
8 26
IN
DATA8 / IN
ACKNLG / OUT
BUSY
11
t
33 !
34
OUT
35
SLCT IN IN
Note:
The column heading "Direction" refers to the direction of signal
l
flow as viewed from the printer.
"Return" denotes the twisted-pair return, to be connected at
l
signal ground level. For the interface wiring, be sure to use a
twisted-pair cable for each signal and to complete the
connection on the return side.
All interface conditions are based
l
and fall times of each signal must be less than 0.2 microseconds.
Data transfer must be carried out by observing the ACKNLG or
l
BUSY signal. (Data transfer to this printer can be carried out
only after receipt of the ACKNLG signal or when the level of
the BUSY signal is LOW.)
STROBE pulse to read data. Pulse
These slgnais represent mformatlon ,
of the 1st to 8th bits of parallel data, i
level when data
IS
LOW when It
IS
About an 11-mlcrosewnd pulse
LOW mdlcates that data has been
readv to accent more data.
HIGH slgnal mdlcates that the
printer cannot receive data. The
signal goes HIGH In the followmg
cases:
1) During data entry (ea. char. time) ;
2) During pnntmg
3) Ounng PAUSE
4) During pnnter-error state
A HIGH signal mdlcates that the
out of paper.
IS
Pulled up to 5V through 3.3 Kohm
When this signal LOW, the paper
IS
IS
fixed to this by settmg DIP switch
24 to ON.)
Not used
isolated from the logic ground.
Not used.
l e v e l .
When thts level becomes LOW, the I
printer controller IS reset to Its
power-up slate and the pnnt buffer
cleared. This level
IS IS
HIGH; Its pulse width must be more 1
than 50 mlcroseconds at the
printer 1s: 1) m paper out state, 2) In j
PAUSE state, 3) m error state
I
Same as for Pms 1 Q-30
I- I Not used.
Pulled up to 5V through 3.3 Kohm
HIGH This
IS
, slgnal always LOW
IS
on
LQ-570/1070-5
IS
IS
I
normally