DCA Intertel 2000 User manual
DCA Intertel 1 DCA Intertel
Technical
Manual
Mobile Printer 2000
DCA Intertel BV
Distributieweg 25, 2404 CM Alphen a/d Rijn
The Nederlands
Phone: +31(0)172 604963 Fax: +31(0)172 605237
website: www.dca-group.com
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Table of Contens
1. DESCRIPTION 4
1.1 Printer Overview 4
1.1.1 Control Panel 5
1.1.2 Push Buttons 5
1.1.3 Signal Lights 5
1.2 Connectors 7
1.3 Sensor - Paper End 8
1.4 Sensor - Automatic Form/Paper loading and advance 9
2. INSTALLATION 11
2.1 Unpacking 11
2.2 Procedure for Installation 11
2.3 CAUTION! 11
2.4 Power Supply 12
2.5 Printer Set up 13
2.6 Paper Loading 14
2.7 Inked Ribbon Cartridge Installation and Replacement 15
2.8 Self Test 15
3.0 INTERFACES 16
3.1 TTL Interface 16
3.2 RS 232- Serial Interface 17
3.3 Parallel Interface 18
4. PRINTER FUNCTION 19
4.1 Printing Formats 19
4.2 Control characters 19
4.2.1 RESET (OPERATING COMMANDS.) 20
4.2.2 Aligment Tuning 20
4.2.3 Print direction and speed 20
4.2.4 Page Control 21
4.2.5 SENSORS 22
4.2.6 PRINTER STATUS 22
4.2.7 BUZZER CONTROL 23
4.2.8 DATA CONTROL 24
4.2.9 PAPER FEED 25
4.2.10 VERTICAL MARGINS (FORMAT COMMANDS) 27
4.2.11 VERTICAL TABS 27
4.2.12 HORIZONTAL MARGINS 29
4.2.13 HORIZONTAL TABS 30
4.2.14 TEXT JUSTIFICATION CONTROLS 31
4.2.15 PRINT QUALITY 31
4.2.16 PRINT PITCH (PRINTING STYLES) 32
4.2.17 CHARACTER WIDTH 33
4.2.18 PRINT STYLES 34
4.2.19 NATIONAL CHARACTER SET 36
4.2.20 POWER REDUCTION COMMANDS / select number of copies 36
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4.3 CHARACTER SET 37
4.3.1 Control characters printing (German characters) 37
4.4 GRAPHIC CAPABILITIES 38
4.4.1 Graphics control characters 38
5. TECHNICAL INFORMATION MP 2000 41
5.1 Technical Specications 41
5.2 Printing Specications 42
5.3 Paper 42
5.4 Inked Ribbon Cartridge 43
5.5 Interfaces 43
5.6 Sensors 43
5.7 Power Supply 43
5.8 Environmental Limits 43
5.9 Dimensions and Weight 44
6. MAINTENANCE 44
6.1 Care and Cleaning 44
7. WARRANTY 44
8. SPAREPARTS BY ARTICLE NUMBER 45
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1. DESCRIPTION
1.1 Printer Overview
Product Outline
MP 2000 is an impact dot matrix printer with tractor and friction feed mechanism for
use in mobile environments.
The mechanism is equipped with a ballistic nine needle printing head, it is able to print
at 150 cps in draft mode and 25 cps in NLQ (Near Letter Quality) mode on multi-copy
paper (one original and up to four copies).
Due to its compact size and reduced weight (2.2 kg), the MP 2000 is particularly sui-
ted for portable applications.
Power requirements have been kept to a minimum by means of two DC motors with
integrated optical encoders. Using an integrated driver board, this ensures the same
precision positioning in comparison to stepping motors.
The MP 2000 can print in the graphics mode along with different character fonts, both
in draft and NLQ mode. It has also been developed mainly for portable applications,
e.g. when connected to a lap-top.
MP 2000 comes standard with 2 Kbytes input buffer and comes with the following
choices of interfaces:
- TTL - level serial interface
- RS-232 serial interface
- Parallel interface
- IRDA infra red
The interface exibility ensures that the MP 2000 can work with almost any computer
system. The MP 2000 is software driven. It is compatible with the driver software of
EPSON LX 400 / LX800 and comes with his own windows ’95 and NT drivers.
Servermotor
Dip Switches
TTL Serial Interface
Control Panel
Optional Board
PRINTER HEAD
Power Supply
Power Board
Logic Board
HOT
Servermotor
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1.1.1 Control Panel
The control panel is connected to the printer. It is tted with four push buttons and
three LED’s.
1.1.2 Push Buttons
On line / Off line
This push button switches the printer on and off line. When the printer is “ON LINE”, it
is ready to accept data from the computer.
Likewise when it is switched “OFF LINE”, the carriage automatically moves to the cen-
ter of the print span. When “ON LINE” the printer ignores the remaining push-buttons
(FF, LF, BF).
Form Feed
Paper advances by one sheet length (i.e. to the beginning of next page).
Line Feed
Paper advances by one line.
Back Feed
Paper retracts by one line.
When MP 2000 is “OFF LINE”, the combined activation of the “ON LINE” and “FORM
FEED” push-buttons causes the printer to go “ON LINE”. It assumes then the actual
paper position as “beginning of page”. Three beeps are generated to acknowledge the
operation.
1.1.3 Signal Lights
Power
This indicator lights when the printer is correctly powered. When power voltage is un-
der 11.5 Vdc the “POWER” indicator ashes at 1 Hz rate. If the printer is battery ope-
rated, and the “POWER” indicator ashes at 1Hz rate, this means that the battery pack
is almost discharged, although the printer can still be operated for some time. Flashing
can be ignored or switched off (see 4.2.7).
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On Line
This indicator turns on when the printer is ready to accept data. If the “ON LINE” led
ashes at 1 Hz rate, the printer switches automatically to “STAND-BY” mode (see
4.2.20).
Paper End
Comes on when the printer is out of paper.
ERROR indicator (special functions)
If the error indicator ashes and the “POWER ON” indicator ashes, this means that
the battery pack voltage has gone below the operating voltage. It is recommended to
turn the printer off in order to avoid the battery pack from getting damaged.
If the error indicator ashes and the “ON LINE” indicator ashes, this means that the
motor is locked due to some mechanical fault. It is recommended to turn the printer
off to avoid battery pack from over discharging.
After a “PAPER END” condition, when the printer is switched “ON LINE” after inserting
new paper, the actual paper position is assumed to be the “beginning of page”.
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Paper End
ERROR
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1.2 Connectors
See gure for connector pin numbering
Specication for logic levels are the following:
Output J1
low level: Vol < 0.5 Volt, lol = 5mA
high level: Voh > 4.5 Volt, loh = -5mA
Input J1
low level: Vil < 0.8 Volt, lil = -1.6mA
high level: Vol < 2.2 Volt, lih = 200μA
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1.3 Sensor - Paper End
A reective sensor is used on the MP 2000 to detect the “PAPER END” condition.
When this sensor detects the end of the currently printed sheet, the following takes
place:
a: printing stops
b: the printer switches to “OFF LINE” (ON LINE indicator goes off)
c: PE (Paper End) indicator comes on.
d: carriage moves to middle of the printing span.
In order to resume printing, a new sheet should be loaded and then press the “ON
LINE” button.
When the printer runs out of paper, this condition is signalled via the serial port by
automatically issuing a “status byte” every 100 ms; bit 2 of status will be at logic “1”
as follows:
paper present: bit 2 = PE = 0
out of paper: bit 2 = PE = 1
The “PAPER END” sensor is also used to detect an “open mechanism” condition; in
fact when the mechanism is open the sensor no longer detects the sheet and actions
described in a, b, c and d take place. The carriage moves to the center until a new
sheet is introduced. The printer mechanism is closed and the “ON LINE” push-button is
pressed.
The “PAPER END” sensor can be disabled using control sequence ESC 8; if disabled,
printing can take place even on the bottom edge of the sheet. The disabling sequence
must be done before any out-of-paper condition develops, should the input buffer
contain some unprinted characters, the disabling sequence would only add up in the
queue never to be executed.
The sensor status can be polled at every line by requesting the printer status; when
PE is active, approximately 10 character lines can be printed before the sheet termina-
tes (with 1/6” line spacing).
Paper End Sensor
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1.4 Sensor - Automatic Form/Paper loading and advance
The MP 2000 with serial interface has the ability to accept single forms.
By inserting a single form sheet (with a maximum of four copies) in the printer, the
paper will automatically go to “Top Of Form”. After the printing is nished, the paper/
form will automatically be ejected. To use this feature, the following software com-
mand settings have to be made.
MP 2000 TOF SETTING
-TOF driver with new board
-Possibility to read the TOF state by the host
-Automatic loading form/paper
-Form ejection over the feeding shaft
-Possibility to feed quickly forward/backward on “n” lines
OPERATIONS MADE ON DEFAULT
On default the printer ignores the PE detector. This allows the host to have the prin-
ter “ON-LINE” with or without paper. This condition is necessary to automatically load
form/paper.
The PE detector can be switched on when required.
COMMAND FOR AUTOMATIC FORM AND PAPER LOADING
ESC #l+b+d+n (“l” is an “L” in lowercase)
b = 0/1; Activates the beep signal when waiting for loading of paper.
d = Indicates the delay in increments of 5 msec. The PE detector is activated prior to
motor starting for the form feed function.
n = When TOF sensor is activated, the form goes up by multiples of 1/216 inches to
TOF.
The printer waits for the paper to be loaded at the back of the unit, then the inter-
lining motor will move until the TOF sensor is activated. From this position the paper
goes back n/216 inches, this new position is the Top Of Form.
The range of the parameter “n” is between 0 and 255 (approximately 0..30 mm).
This command must be sent before every automatic loading.
FORM EJECT COMMAND
ESC #e
The printer starts to eject the form until the PE detector is inactivated adding a “safety
time”. Before ejecting, the printer will print out the line buffer contents and disactiva-
tes the PE detector.
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QUICK JUMP COMMAND
ESC #j+d+n
The printer makes a forward or backward feed of the paper of “n” lines.
d= 0 (binary or ASCII): forward feed
d= 1 (binary or ASCII): backward feed
n= number of lines (the dimension is set up by the proper command) to feed.
The paper feeding is limited according to the form dimensions. The dimension is set up
by the proper command (default 11 inches): it is not possible to go backward over the
top of the form or to go forward over the edge of the form.
Before the feeding of the paper, the printer will print out the contents of the line buf-
fer.
READING OF TOF STATUS
It can be read on bit “b1” of the status byte: 1 = TOF sensor covered.
The TOF sensor is detected by regular periods.
During the form setting, the sampling is quicker than normal, in order to have more
precise precision. In all the other operating conditions, the TOF signal is tested every
100 msec.
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2. INSTALLATION
2.1 Unpacking
Take the printer out of its shipping box and remove any padding material. It is ad-
visable to keep the shipping box in case the printer needs to be re-shipped for repair,
replacement or placed into storage.
2.2 Procedure for Installation
Mechanical Installation
Paper movement should meet the following requirements:
−Paper should be guided to remain in a right angle position in line with the printer.
The printer does not feature any paper alignment device but only paper advancing/
retracting means. Therefore, any paper that is off-axis, misalignment cannot be cor-
rected by the printer.
−Paper should remain parallel to the printing plane, also past the paper advancing
devices (sprocket tape/friction rollers) and particularly under the print head.
2.3 CAUTION!
• Do not print without inked ribbon or paper, this can lead to rapid print head
needle wear- out.
• When switching the printer on, it is advisable to check that the inked ribbon is
in place. (see Illustration: Cartridge installation.)
• Avoid putting foreign matters into the printer.
• Avoid moving the print head manually.
• Avoid mechanical shocks to the electronic boards and to the printing mechanism.
• Before starting to print, check that the inked ribbon cartridge is correctly installed,
the paper is loaded in the proper position and printer’s upper swivelling part is locked
to the lower one.
• If the printer has worked for some time, avoid touching the print head: it can be
overheated. It is advisable to wait a few minutes before attempting to replace the in-
ked ribbon cartridge.
• Once the printer has been switched off, wait at least 10 seconds before switching it
on again, this enables the internal reset circuitry to work properly.
• Printer noise increases if the sheet is not in tight contact with the printing plane.
• Do not open the printer when it is operating.
• Switch the computer on before the printer and switch the printer off before the com-
puter.
• This avoids dummy data being sent by the computer to the printer during the swit-
ching on/off sequence.
• Cleaning: do not use abrasive cleaners, unplug from mains before cleaning the prin-
ter.
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2.4 Power Supply
The MP 2000 should be powered by a direct current source whose voltage falls strictly
within the following range : +10.8 to + 14.0 Vdc.
Owing to the print head’s needle ring, it is important to consider that the printer, acts
as a very discontinuous loads with I max. abs = 30A for 600 µs, and I max. typ = 20
A for 300 µs: peak repetition frequency is 900 Hz.
The power supply should therefore be able to deliver high peak currents without
overshooting the absolute Vmax. The ripple value should always remain within the
input voltage’s operating limits. The specication of the supply should be particularly
checked for the application whenever a switching power supply (SPS) is used, general-
ly these exhibit a longer recovery time than their linear counterparts.
Any overvoltage or undervoltage, even for a short duration, can cause respectively
electronic circuit damage or microprocessor malfunction and should therefore be avoi-
ded. The same applies for electrostatic charges exceeding 5kV applied to the printer’s
frame.
The MP 2000 has been particularly developed for portable and battery operated sys-
tems; in the latter application, the following points should be noted:
• When the supply’s voltage is under the low threshold of 11.5V (batteries nearly drai-
ned) the “POWER ON” indicator ashes. This function can be disactivated by means of
the ESC #C n control (see 4.2.7.)
• When the voltage drops below 10.5 V (batteries drained) the printer stops working
while the Error indicator intermittently and the “POWER ON” indicator ashes. To reset
this error condition you need to switch the printer off, recharge the battery pack and
then switch the printer on again.
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2.5 Printer Set up
The MP 2000 can operate with different hardware/software. It can be congurated by
using the SW1/SW2 DIP-switch set, as shown in Fig. 3 The function of the DIP-swit-
ches is shown in Table 3.
TABLE 3 - DIP SWITCHES
Dip Switch Function
SW1-1 Baud rate (see table 4)
SW1-2 Baud rate (see table 4)
SW1-3 for serial interface:
ON = XON/XOFF mode
OFF= DTR/DSR mode
SW1-4 National character set (table 5)
SW1-5 National character set (table 5)
SW1-6 National character set (table 5)
SW1-7 CRLF mode: ON= enabled OFF= disabled
SW1-8 STAND-BY mode: ON= enabled OFF= disabled
NOTE: Factory standard setting: 4,5,6, ON
TABLE 4 - BAUD RATE SELECTION
Baud rate SW1-1 SW1-2
1200 ON ON
2400 OFF ON
4800 ON OFF
9600 OFF OFF
TABLE 5 - NATIONAL CHARACTER SET SELECTION BY DIP SWITCH
National character set SW1-6 SW1-5 SW1-4
USA ON ON ON
FRANCE ON ON OFF
GERMANY ON OFF ON
GREAT BRITAIN ON OFF OFF
DENMARK OFF ON ON
SWEDEN OFF ON OFF
ITALY OFF OFF ON
SPAIN OFF OFF OFF
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Table 3 - Instructions
Using DIP switches SW1-4/5/6 a particular National Character Set can be selected;
this selection modies the appearance of some characters according to table 10.
Software command “ESC R n” (see further) has priority over DIP-switch selection.
CRLF MODE = ON means that after every CR character (carriage return) sent by the
host, the printer automatically performs a LF (Line Feed) operation.
STAND BY MODE = ON: means that after a certain pre-set inactivity time (default
setting is 20 seconds) the printer switches to stand-by mode with 50% power drain
reduction.
Some of the settings selected using DIP-switches can be modied using software com-
mands; if the DIP-switch settings are changed while the printer is on, the new congu-
ration will be working after the printer is switched off and on.
2.6 Paper Loading
MP 2000 can print on DIN A4/A5 size single sheet paper/forms or multi part paper/
forms or continuous fan-fold paper with hole to hole spacing of 227 mm (8.94”).
See gure for correct paper loading.
The procedure for a correct paper loading is the following:
1) Set the printer “OFF LINE” pressing the relevant push-button
2) Open the printer by lifting lever A. (Fig. 1)
3) Insert single-sheet paper module by placing it over the printing plate, checking that
it is equally spaced with the printing area; in case of continuous fan-fold paper, be
sure that the sprockets do engage correctly in the holes provided near to the paper
edges.
4) Close the swivelling printer top and switch the printer “ON LINE”.
Paper feeding direction
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2.7 Inked Ribbon Cartridge Installation and Replacement
Cartridge Installation/Replacement Procedure:
1) Switch the printer off.
2) Remove used cartridge by unlocking the bottom latch and rotating cartridge body
upwards as shown by arrow D.
3) Place ribbon extender on both studs B until it locks down, paying attention to the
ribbon not disengaging from the extender.
4) Move the cartridge body gently along the printing axis and place it down on holder
C; the ribbon should partly enter in the gap between the steel-wire ribbon holder and
the print head nose
5) Stretch the inked ribbon by turning knob A clockwise
6) Turn the printer on without loading any paper; make sure that after the switch-on
side movement of the print head, the ribbon is properly positioned under print head’s
nose.
2.8 Self Test
The printer is able to perform an internal self-check routine followed by a self test
printout.
There are two different self test modes:
- Demonstration Test
To execute this procedure, simply keep the “LINE FEED” push-button pressed while
the printer is powered up. The test procedure prints the rst page where general infor-
mation about MP 2000 is given and the second page showing the different fonts.
- Continuous Alphanumeric Test
To execute this selftest, it is necessary to keep the BACKFEED push-button pressed
while powering up the printer. The test produces a printout of the current software
version, followed by printing all the characters from 20hex and 7Fhex, each followed
by a space (40 characters per line, 66 lines per page).
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3.0 INTERFACES
3.1 TTL Interface
Serial Data Format:
-1 start bit
-8 data bits
-No Parity
-1 stop bit
The transmission rate is selectable within the following values: 1200/2400/4800/9600
Baud.
Baud rate selection is performed by setting dip-switches SW1-1and SW1-2 according
to paragraph 2.5 Most important is to set SW1-3 according to the chosen serial
interface, this being the protocol XON-XOFF (XON = 17dec.= 11hex; XOFF = 19dec =
13hex) or the
DTR-DSR (hardware ag) mode. The TTL level control signals are as follows:
- TxD (output) Transmit Data.
The printer sends data to the computer over this line; when idle, this line is at logic
“1”.
- RxD (input) Receive Data.
The printer receives data transmitted from the computer over this line; idle at logic
“1”.
- DTR (output) Data Terminal Ready:
“0” = printer is ready to receive data
“1” = printer is busy and cannot receive data.
- DSR (input) Data Set Ready
Controls data exchange from printer to computer
“0” = printer can send data
“1” = printer cannot send data.
NOTE: the terms “input” and “output” refer to the printer.
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Table 6 shows the pinout for connector J3 (10 way at cable), used to connect the
printer to the host computer.
TABLE 6 - TTL SERIAL INTERFACE CONNECTOR J3
PIN DIRECTION FUNCTION
01 output +Vp for suppl. ext. dev. Imax=200mA
02 output +Vp for suppl. ext. dev. Imax=200mA
03 output +5V for suppl. ext. dev. Imax=20mA
04 output +5V for suppl. ext. dev. Imax=20mA
05 output TXD
06 input RXD
07 output DTR
08 input DSR
09 output GND
10 output GND
3.2 RS 232- Serial Interface
The printer’s serial TTL port is adapted to RS 232 C Standard interface. The pinout is
shown in Table 7.
TABLE 7 - RS-232C SERIAL INTERFACE CONNECTOR (DB 9)
Connection from Serial Cable Male to Female
01 --------------------- 01
02 RX --------------------- 03 TX
03 TX --------------------- 02 RX
04 DTR --------------------- 06 DSR
05 GND --------------------- 05 GND
06 DSR --------------------- 04 DTR
07 RTS --------------------- 08 CTS
08 CTS --------------------- 07 RTS
09 RI --------------------- 09 RI
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3.3 Parallel Interface
The parallel interface board allows for data exchange with the printer under the cen-
tronics parallel protocols. The pinout is shown in Table 8.
The parallel interface board can’t be used at the same time with the T.O.F. sensor.
TABLE 8 - PARALLEL INTERFACE CONNECTOR
PIN SIGNAL DESCRIPTION DIRECTION
01 /STROBE STROBE for data read-in IN
02 D0 DATA 0 IN
03 D1 DATA 1 IN
04 D2 DATA 2 IN
05 D3 DATA 3 IN
06 D4 DATA 4 IN
07 D5 DATA 5 IN
08 D6 DATA 6 IN
09 D7 DATA 7 IN
10 /ACK new data request OUT
11 BUSY data received OUT
12 PE paper error/paper end OUT
13 SLCT printer is ON OUT
14 /AUTO FEED automatic LINE FEED
XT request IN
15 /ERROR printer error OUT
16 /INIT printer initialise IN
17 /SLCT-IN not connected (IN)
18 ..25 GND GROUND IN/OUT
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4. PRINTER FUNCTION
4.1 Printing Formats
MP 2000 can print in different styles and formats, which can be selected by using sui-
table command sequence (character strings preceded by the ESC character: Escape =
27 dec = 1 Bhex)
A selection of different styles can be performed during the actual printing of the docu-
ment.
Two basic print qualities can be selected:
- DRAFT
- NLQ (Near Letter Quality)
When NLQ is selected two styles can be chosen:
- Roman
- Sans Serif
Following print densities are available:
5 6 8.57 10 12 17.14 20 CPI (characters per inch)
4.2 Control characters
Note: Each command is described as follows:
ESC.. (name of command)
Format:
ASCII: (character sequence in ASCII standard)
decimal: (character sequence in decimal numbers)
hexadecimal: (character sequence in hexadecimal num.)
Comment:
(description of the command functions)
Some of the commands take an input parameter in order to enable or disable a parti-
cular function; in this case either codes 00hex and 01hex or ASCII character 0 and 1
(30hex and 31hex) can be used.
Commands are executed immediately after they have been received; it should be kept
in mind, however, should the input buffer not be empty, the incoming commands will
be appended to the buffer queue and will be executed only after the preceding charac-
ters are printed.
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4.2.1 RESET (OPERATING COMMANDS.)
ESC @ Printer reset
Format:
ASCII: ESC @
decimal: 27 64
hexadecimal: 1B 40
Comment:
The printer is reset to the initial conditions and default settings. ASCII code 64 can re-
present different characters according to the national character set used and the code
could therefore appear with different symbols on the keyboard(see table 10)
4.2.2 Aligment Tuning
ESC # J n Bidirectional alignment tuning
Format:
ASCII: ESC # J n
decimal: 27 35 74 n
hexadecimal: 1B 23 4A n
Comment:
0 ≤ n ≤ 20, default value 0hex ≤ n ≤ 14hex).
This command allows for the ne tuning of the print head alignment during bidirectio-
nal print. The ne alignment is required when extended ASCII graphic characters are
used (from 176 dec to 223 dec)
These graphic characters are normally printed bidirectionally, unless when unidirec-
tional print is forced (ESC< and ESC U n commands). Graphics mode and NLQ mode
printing always take place unidirectionally. Alignment verication can be performed
using the BASIC program that follows; g 15 shows how alignment is affected by diffe-
rent values of “n”. By changing the default value, ne alignment tuning can be obtai-
ned for both printing directions. Resolution is 1/480” (0.053mm) for each “n” unit.
4.2.3 Print direction and speed
ESC s n Half speed enable/disable
Format:
ASCII: ESC s n
decimal: 27 115 n
hexadecimal: 1B 73 n
Comment:
n = 1 enables half speed printing
n = 0 restores standard full speed printing
Table of contents
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