ML 3320/3321
SEL
SEL
MENU
LF
Micro Feed
Down
SHIFT
FF/LOAD
EXIT
POWER
Micro Feed
Up
TEAR
PRINT QUALITY
GROUP
ALARM
P
ARK
ITEM
MENU
QUIET
TOF
HSD
NLQ
SET
UTL
PRINT
SSD
CHARACTER PITCH
10
17
12
20
15
PROP
Help Guide
Safety
Your Oki printer has been carefully designed to give you years of
safe, reliable performance. As with all electrical equipment, there
are a few basic precautions you should take to avoid hurting
yourself or damaging the printer:
•
•
Do not use your printer near water, or spill liquid of any kind
into it.
Be certain that your power source matches the rating listed
on the back of the printer. If you are not sure, check with your
dealer or with your local power company.
•
•
•
•
Read the setup and operating instructions in this manual
carefully. Be sure to save it for future reference.
•
Your printer has an earthed, 3-pin plug as a safety feature,
and it will only fit into an earthed outlet. If you can not plug
it in, chances are that you have an older, non-earthed outlet;
contact an electrician to have it replaced with an earthed outlet.
Do not use an adapter to defeat the earthing.
Read and follow all warning and instruction labels on the
printer itself.
Unplug the printer before you clean it. Use only a damp cloth;
do not use liquid or aerosol cleaners.
•
•
The outlet into which you plug your printer must remain easily
accessible at all times.
Place your printer on a firm, solid surface. If you put in on
something unsteady, it might fall and be damaged; if you place
it on a soft surface, such as a rug, sofa, or bed, the vents may
be blocked, causing it to overheat.
To avoid damaging the power cable, do not put anything on it
or place it where it will be walked on. If the cable becomes
damaged or frayed, replace it immediately.
•
•
To protect your printer from overheating, make sure no
openings on the printer are blocked. Do not put the printer on
or near a heat source, such as a radiator or heat register. If you
put the printer in any kind of enclosure, make sure it is well
ventilated.
•
If you are using an extension cable or power strip with the
printer, make sure that the total of the amperes required by all
the equipment on the extension is less than the extension’s
rating. Generally, the total ratings of all equipment plugged
into any one power line should not exceed 15 amperes. Don’t
exceed this unless you know that the power line your
equipment is plugged into has a rating above 15 amperes.
The printhead can get quite hot when it has been printing for
a length of time. Do not touch the printhead until it has had a
chance to cool off.
Help Guide
i
•
•
Do not poke anything into the ventilation slots on the sides
of the printer; you could get a shock or cause a fire.
Aside from the routine maintenance described in this
handbook, do not try to service the printer yourself; opening
the cover may expose you to shocks or other hazards. Do not
make any adjustments other than those outlined in the
handbook, you might cause damage requiring extensive repair
work.
•
If anything happens that indicates that your printer is not
working properly or has been damaged, unplug it immediately
and contact your dealer. These are some of the things to look
for:
•
•
The power cable or plug is frayed or damaged.
Liquid has been spilled into the housing, or the printer
has been exposed to water.
•
•
The printer has been dropped or its cabinet has been
damaged.
The printer does not function normally when you are
following the operating instructions.
ii
ML3320/21
Contents
Safety .................................................................................. i
Menu Mode: Control Panel ............................................. 14
Maintenance....................................................................... 1 Entering and Exiting the Menu Mode ............................. 15
Replacing the Ribbon Cartridge ........................................ 1 Resetting the Menu .......................................................... 15
Clearing Paper Jams .......................................................... 2
Printing the Menu Settings .............................................. 15
Rear-Feed Jams ................................................................. 2 Changing the Menu Settings ........................................... 15
Correcting Repetitive Rear-Feed Jams .............................. 4 Summary of Menu Settings ............................................. 16
Single-Sheet Jams.............................................................. 6
Explanations of Menu Items............................................ 19
Cleaning the Housing ........................................................ 7 Using the Printer's Features ............................................. 21
Troubleshooting ................................................................. 8 Tear Feature ..................................................................... 21
Using Your Printer ........................................................... 11
Forms Tear-Off Feature ................................................... 21
Print Mode: Indicator Lights ........................................... 11 Paper Park Feature ........................................................... 22
Print Mode: Control Panel Keys...................................... 12 Specifications................................................................... 23
Selecting the Print Quality .............................................. 13
Selecting the Character Pitch .......................................... 14
Index ................................................................................ 26
Help Guide
iii
iv
ML3320/21
Maintenance
Replacing the Ribbon Cartridge
3. Remove and discard the used ribbon cartridge.
Note: For the best results, use genuine Oki ribbons.
1. Make sure the printer is turned OFF.
2. Centre the printhead (➊).
Caution! The printhead may be HOT!
➊
M
4. Unpack the new ribbon cartridge.
Help Guide
1
5. Install the new ribbon cartridge.
Clearing Paper Jams
Rear-Feed Jams
1. Turn the printer OFF and use the platen knob to back the
paper all the way out.
A
6. Turn the knob (➊) in the direction of the arrow to take up
any ribbon slack.
2. Open the access cover, and remove the pull-up roller
assembly.
➊
2
ML3320/21
3. Remove any torn pieces of paper.
6. Turn the printer on.
4. Replace the pull-up roller assembly, and close the access
cover.
7. Press FF/LOAD.
5. Reload paper.
FF/LOAD
Micro Feed
Up
ITEM
Help Guide
3
Correcting Repetitive Rear-Feed Jams
If the paper keeps jamming, you probably have bits of paper
stuck in the paper path.
3. Fold some continuous-form paper over three times to
make a page four sheets thick, load it on the tractors and
close the covers.
1. Perform steps 1 through 3 under “Rear-Feed Jams.”
2. Grasp the paper separator (➊), lift it slightly, pull back
on it, then swing it forward.
➊
4. Swing the paper separator over, and use the platen knob
to draw the quadruple-thick page around the platen: this
brings out any jammed bits of paper.
TEAR
PRINT QUALITY
PARK
QUIET
HSD
SET
UTL
TOF
NLQ
PRINT
CHARACTER PITCH
SSD
10
17
12
20
15
PROP
4
ML3320/21
5. Remove the paper pieces, and use the platen knob to 7. Replace the pull-up roller assembly, and close the access
back the paper out.
cover.
FF/LOAD
Micro Feed
Up
TEAR
PRINT QUALITY
PARK
TEM
QUIET
TOF
HSD
NLQ
SET
UTL
MENU
PRINT
CHARACTER PITCH
SSD
10
17
12
20
15
PROP
8. Turn the printer on.
6. Swing the paper separator over, reload regular paper, and
lower the paper separator back into place.
9. Press FF/LOAD.
FF/LOAD
Micro Feed
Up
ITEM
Help Guide
5
4. Remove any torn pieces from around the carriage.
Single-Sheet Jams
5. Reinstall the pull-up roller assembly, and close the access
cover.
1. Turn the printer off.
2. Use the platen knob to back the jammed paper out.
SEL
SEL
MENU
LF
Micro Feed
Down
SHIFT
EXIT
POWER
FF/LOAD
Micro Feed
Up
TEAR
PRINT QUALITY
ALARM
GROUP
PARK
ITEM
MENU
QUIET
TOF
HSD
NLQ
SET
UTL
PRINT
CHARACTER PITCH
SSD
10
17
12
20
15
PROP
6. Turn the printer on, and reload paper.
3. Open the access cover and remove the pull-up roller
assembly.
SEL
SEL
MENU
LF
Micro Feed
Down
SHIFT
EXIT
POWER
FF/LOAD
Micro Feed
Up
TEAR
PRINT QUALITY
ALARM
GROUP
PARK
ITEM
MENU
QUIET
TOF
HSD
NLQ
SET
UTL
PRINT
CHARACTER PITCH
SSD
10
17
12
20
15
PROP
6
ML3320/21
Cleaning the Housing
You should clean the printer every six months (or after about
300 hours of operation).
4. Reinstall the pull-up roller assembly, and close the access
cover.
Note: Never use solvents or strong detergents on the cabi-
net: they could damage the housing.
1. Turn the printer off, and remove any paper from the path.
2. Open the access cover, remove the pull-up roller
assembly.
3. Use a clean, dry cloth to dust around the carriage shaft
and platen. Remove any loose bits of paper.
Help Guide
7
Problem: I'm getting strange symbols, incorrect fonts, etc.,
Troubleshooting
when I try to print a document.
Problem: Nothing happens when I turn on the printer.
Solution: (1) Check to be sure that the printer driver you
have selected in your software matches the
printer emulation. (Press SHIFT and SEL
keys, then press GROUP key: this will print a
line showing the emulation you have selected.)
Solution: Check the power cable connection and power
outlet to your printer. If you are using a power
strip, make sure it is turned on, and that the fuse
has not blown nor the circuit breaker tripped.
(2) If you have embedded any printer commands
in your software, check to be sure that you
entered them correctly.
Problem: The printer does not print when data is sent.
Solutions:(1) Is the SEL light on? If not, press the SEL key.
(2) Check that the interface cable is securely
connected to both the printer and the computer.
Problem: I've installed a new ribbon and the printing is
smeared and streaked.
(3) If you have the optional serial interface board
installed, check to be sure that it is firmly
seated in the printer.
Solution: The ribbon shield is either loose or missing.
Remove the ribbon cartridge and check the clear
plastic ribbon shield: if it's loose, secure it in place,
if it is missing, find it and reinstall it.
8
ML3320/21
Problem: The ALARM light is on and the Character Pitch Problem: My word processor files don’t print the way I
15 light is flashing. have the menu and front panel set.
Solution: This indicates a paper jam. Press the SEL key and Solution: Before sending a file to the printer, many word
correct the paper jam situation ( see “Clearing
Paper Jams” earlier in this manual).
processors send either an “initialisation string” or
an I-Prime signal to the printer. The initialisation
string contains codes that override the panel and
menu settings.
Problem: The ALARM light is on and the Character Pitch
10 light is flashing.
To change your printer to ignore the reset code,
enter the Menu Mode, go down to the Set-Up
group and change the setting for Reset Inhibit to
Yes (see Menu Mode later in this manual).
Solution: This indicates that the paper lever is set at the
wrong position for the paper you are trying to use:
move it to the proper setting.
The I-Prime signal will automatically override any
front panel settings you have made. To eliminate
this problem, enter the Menu Mode, go down to
the Parallel Interface group and change the setting
for I-Prime to Invalid (see Menu Mode later in
this manual).
Problem: The ALARM light is blinking.
Solution: Try turning the printer off and then back on again.
If the light still blinks, call for service.
Problem: The printer needs paper, but the ALARM light
is not on and I can’t load the paper.
Solution: Press and release the SEL key, then hold the
SHIFT key and press the RESET (CHARACTER
PITCH) key: this resets the printer.
Help Guide
9
Problem: The Print Quality and Character Pitch keys on
the front panel won’t work.
Solution: The Operator Panel Function in the printer menu
can be used to disable these buttons. If the printer
is part of a customised system or if it is used by a
number of people, the system manager may have
used this option to make sure the printer is always
set properly.
Problem: Continuous-form paper is sticking to the paper
separator.
Solution: In cold dry weather, static charges can build up
and make the paper cling to the paper separator.
Try moving the paper guides together so that the
paper rests on the guides rather than on the
separator.
Problem: Ink smears on paper.
Solution: This may be caused by excessive printhead travel
from the centring position when printing narrow
columns. Set Centring Position to MODE 1. On
ML3321 also try MODE 2. (See Menu Mode).
10
ML3320/21
UsingYour Printer
Print Mode: Indicator Lights
➍
➋
➊
PRINT QUALITY
HSD
UTL
SSD
SEL
SEL
NLQ
FF/LOAD
TEAR
SET
PARK
QUIET
TOF
LF
Micro Feed
Down
Micro Feed
Up
SHIFT
MENU
CHARACTER PITCH
10
12
20
15
PRINT
ITEM
EXIT
POWER
GROUP
17
PROP
ALARM
MENU
➎
➌
➏
➊ SEL .............. Glows = printer selected, ready to receive data
Flashes = printer in Print Suppress Mode
➎ ALARM ...................... Glows = error condition exists:
➤ out of paper if no other lights are blinking
➤ paper jam if 15 cpi light is also blinking
Not lit = printer deselected (can’t receive data)
➤ paper lever is set to wrong position if 10 cpi
➋ QUIET ......... Glows = printer in Quiet state.
➌ POWER ....... Glows = printer turned on.
light is also blinking.
Blinks = error condition. Turn printer off, then on;
if the light still flashes, contact your service dealer.
➍ PRINT QUALITY ..... Indicates print quality selected.
➏ 10/12/15/17/20/PROP ..... Indicate character pitch selected.
Help Guide
11
Print Mode: Control Panel Keys
➍
➎
➋
➌
➊
PRINT QUALITY
HSD
UTL
SEL
SEL
NLQ
SSD
FF/LOAD
TEAR
SET
PARK
QUIET
TOF
LF
Micro Feed
Down
Micro Feed
Up
SHIFT
MENU
CHARACTER PITCH
10
12
20
15
PRINT
ITEM
EXIT
POWER
GROUP
17
PROP
ALARM
MENU
➏
➑
➒
➐
➊ SEL ......... Selects/deselects printer. When held on power up, ➎ PRINT QUALITY ........... Selects the print quality.
engages the Menu Mode.
➏FF/LOAD ......................... Loads/ejects single sheet of paper;
➋ SHIFT ..... Press and hold while pressing another switch to en-
gage the alternate function for that switch (e.g.
“Micro Feed Down” for the LF key).
moves continuous-form paper to
print position.
➐TEAR ................................ Moves continuous-form paper up
➌ LF............ Moves paper up one line: press and hold for repeti-
tive line feeds. When held on power up, activates
the Font Test
for tear-off or back down for print-
ing.
➑ PARK ................................ Retracts continuous-form paper
➍ QUIET .... Turns Quiet Mode on and off. When held on power
from the path
up, activates the Rolling ASCII Test.
➒ CHARACTER PITCH .... Selects the character pitch. Used
with the SHIFT key to reset the
printer.
12
ML3320/21
Selecting the Print Quality
Important! Front panel settings for print quality and SSD: Super Speed Draft
character pitch can be overridden by software
commands. The lights will always reflect the
printer’s state.
•
•
•
Lowest quality (12 cpi only), fastest speed
Gothic font only
Recommended for fastest output of preliminary drafts.
In order to use Super Speed Draft (SSD), you must enter
the Menu Mode and make changes:
Press PRINT QUALITY to select:
NLQ: Near Letter Quality
1. Press SHIFT + SEL.
2. Press GROUP twice.
3. Press ITEM.
4. Press SET until DRAFT appears as the setting for the
•
•
•
Highest quality, slowest speed
Courier or Gothic fonts
Recommended for correspondence
Print Mode.
5. Press ITEM.
6. Press SET (SSD appears as the setting for the Draft
Mode).
7. Press SHIFT + SEL key to exit the Menu Mode and
save your changes.
UTL: Utility
•
•
•
Medium quality, medium speed
Gothic font only
Recommended for internal documents and high-volume
data.
HSD: High Speed Draft
•
•
•
Lower quality, faster speed
Gothic font only
Recommended for preliminary drafts.
Help Guide
13
Selecting the Character Pitch
Menu Mode: Control Panel
➊
➋
➌
➍
Press CHARACTER PITCH to select the width of
characters in characters per inch:
SEL
10 cpi
FF/LOAD
TEAR
SET
PARK
QUIET
TOF
LF
SEL
Micro Feed
Down
Micro Feed
Up
SHIFT
MENU
•
•
Recommended for standard text
Not available for SSD
PRINT
ITEM
EXIT
POWER
GROUP
ALARM
MENU
12 cpi
•
•
Recommended for standard text.
Yields more text per page.
➎
➊ GROUP key ... Prints the next Group in the Menu. With the
SHIFT key, prints the previous Group.
17.1 cpi, 20 cpi
•
•
•
Smallest print
Recommended for spreadsheets
Not available for SSD.
➋ ITEM key ....... Prints the next Item in the Group. With the
SHIFT key, prints the previous Item in the
Group.
➌ SET key .......... Prints the next Setting for an Item. With the
SHIFT key, prints the previous Setting for an
Item.
PROP
•
•
Proportional spacing
Recommended for documents where you want a more
polished appearance.
➍ PRINT key ..... Prints a copy of all the Menu settings. With
the SHIFT key, prints the current settings for
the Group selected.
•
Available only for NLQ.
➎ MENU light.... Glows when the printer is in the Menu Mode.
14
ML3320/21
Entering and Exiting the Menu Mode
Changing the Menu Settings
To enter or exit the Menu Mode, hold SHIFT while pressing 1. Press SHIFT + SEL to enter the Menu Mode.
SEL.
2. Use the GROUP, ITEM and SET keys to make your
changes:
Resetting the Menu
➤
➤
➤
Press GROUP successively until the Group you
wish to change appears in the first column.
To reset the Menu to the standard settings:
1. Turn the printer off.
Press ITEM until the Item you wish to change
appears in the second column.
2. Press SEL + LF while turning the printer on.
Press SET until the setting you want appears in the
third column.
Printing the Menu Settings
3. Press SHIFT + SEL to exit the Menu Mode and save
1. Make sure paper is loaded in the printer.
2. Enter the Menu Mode (SHIFT + SEL).
3. Press PRINT (PARK).
your settings.
Important! If you turn the printer off without first exiting
the Menu Mode, the changes you have made
will be lost.
Note: To print out a listing of the settings for all menu
items, regardless of the emulation selected or the
accessories installed, enter the Menu Mode, then
press SHIFT + PRINT QUALITY.
Help Guide
15
Summary of Menu Settings
The table below shows the items which may appear in the menu. Settings which are engaged at the factory (defaults) are set in bold
italic. Some groups or entries will only appear when a specific emulation is engaged, as noted.
Group
Item
Setting
Printer Control Emulation Mode
IBM PPR, EPSON FX, ML
Font
Print Mode
Draft Mode
Pitch
Utility, NLQ Courier, NLQ Gothic, DRAFT
HSD, SSD
10 cpi, 12 cpi, 15 cpi, 17.1 cpi, 20 cpi
Proportional Spacing
Style
No, Yes
Normal, Italics
Size
Single, Double
Symbol Sets
Character Set
Language Set
Set I, Set II, Standard*, Line Graphics*, Block Graphics*
ASCII, French, German, British, Danish I, Swedish I, Swedish II, Swedish III,
Swedish IV, Italian, Spanish I, Japanese, Norwegian, Danish II, Spanish II,
Latin American, French Canadian, Dutch, TRS 80, Turkish, Swiss I, Swiss II, Publisher
Slashed, Unslashed
USA, Serbo Croatic II, Canada French, ECMA-94, Multilingual, Windows East Europe,
Portugal, Windows Greek, Norway, Latin 5 (Windows Turkey), Baltic 774, Windows
Cyrillic, East Europe Latin II-852, Cyrillic I-855, Hungarian CWI, Turkey 857,
Ukrainian, Cyrillic II-866, ISO Latin 6, Greek_869, Hebrew NC (862), Kamenicky
(MJK), Hebrew OC, Greek_437, Windows Hebrew, Greek_437 CYPRUS, Windows
Baltic, Turkey, Bulgarian, Polska Mazovia, Greek_928, ISO Latin 2, Serbo Croatic I
Zero Character
Code Page
Slashed Letter O
No, Yes
* Appears only when the MICROLINE Standard emulation is selected.
16
ML3320/21
Group
Item
Settings
Rear Feed
Line Spacing
6 LPI, 8 LPI
Form Tear-Off
Off, 500 mS, 1 sec, 2 sec
Skip Over Perforation
Page Width (ML3321 only)
Page Length
No, Yes
13.6", 8"
11", 11-2/3", 12", 14", 17", 3", 3.5", 4", 5.5", 6", 7", 8", 8.5"
Bottom Feed
Top Feed
Line Spacing
Form Tear-Off
Skip Over Perforation
Page Width (ML3321 only)
Page Length
6 LPI, 8 LPI
Off, 500 mS, 1 sec, 2 sec
No, Yes
13.6", 8"
11", 11-2/3", 12", 14", 17", 3", 3.5", 4", 5.5", 6", 7", 8", 8.5"
6 LPI, 8 LPI
Line Spacing
Bottom Margin
Valid, Invalid
Page Width (ML3321 only)
Page Length
13.6", 8"
11", 11-2/3", 12", 14", 16.57", 3", 3.5", 4", 5.5", 6", 7", 8", 8.5"
Wait Time
500 mS,1 sec, 2 sec
Page Length Control
Graphics
By MENU Setting, By Actual Page Length
Bidirectional, Unidirectional
Set-Up
7 or 8 Bit Graphics*
Receive Buffer Size
Paper Out Override
Print Registration
8, 7
1 Line, 16K, 28K
No, Yes
0.25 mm Right, 0.20 mm Right, 0.15 mm Right, 0.10 mm Right, 0.05 mm Right, 0,
0.05 mm Left, 0.10 mm Left, 0.15 mm Left, 0.15 mm Left, 0.15 mm Left
7 or 8 Bits Data Word*
8, 7
* Appears only when the MICROLINE Standard emulation is selected.
Help Guide
17
Group
Item
Settings
Set-Up
continued
Operator Panel Function
Reset Inhibit
Full Operation, Limited Operation
No, Yes
Print Suppress Effective
Auto LF
Auto CR+
Yes, No
No, Yes
No, Yes
Print DEL Code*
SI Select Pitch (10 cpi)+
SI Select Pitch (12 cpi)+
Time Out Print
Auto Select
No, Yes
17.1 cpi, 15 cpi
20 cpi, 12 cpi
Valid, Invalid
No, Yes
Centring Position
I-Prime
Pin 18
DEFAULT, MODE 1, MODE 2***
Buffer Print, Invalid, Buffer Clear
+5V, Open
Parallel I/F
Auto Feed XT**
Invalid, Valid
* Appears only when the MICROLINE Standard emulation is selected.
+ Appears only when the IBM emulation is selected.
** Applies only when the Epson emulation is selected.
*** ML3321 only.
18
ML3320/21
Character Set. Choose IBM Set I or IBM Set II.
Explanations of Menu Items
Code Page. Choose the Code Page character set you wish to
use: USA (IBM 437), Canada French (IBM 863),
Multilingual (IBM 850), Portugal (IBM 860), Norway (IBM
865), BRASC II, or Abicomp.
7 or 8 Bits Data Word (ML). If your computer system uses
seven bits to make up each unit of data, change this setting to 7.
7 or 8 Bit Graphics. Choose the graphics your system uses:
7 or 8 dots in each column printed.
Draft Mode. Change to SSD if you wish to use the Super
Speed Draft mode of printing. Note: Print Mode must be set
to DRAFT for this setting to be effective.
Auto CR (IBM). If you want the printer to automatically
add a carriage return when a Line Feed is received at the end
of a line, change the setting to Yes.
Emulation Mode. Choose the printer emulation.
Auto LF. If your printout is consistently double spaced, select
No; if it overprints, select Yes.
Form Tear-Off. Choose 500 mS, 1 sec, or 2 sec to turn the
Form Tear-Off feature on and to set the time interval for the
printer to wait before advancing the paper.
Auto Feed XT (Epson). If your system uses pin 14 of the
parallel interface to control automatic line feed, change the
setting to Valid.
Graphics. Change to bidirectional graphics for faster
printing: optimise the registration using the Print Registration
menu item.
Auto Select. If you always use the sameTop of Form position,
change the setting to Yes.
I-Prime. Determines what the printer will do when it receives
the I-Prime signal from the host: Buffer Print prints out the
buffer contents before resetting; Buffer Clear dumps the buffer
contents immediately. Invalid causes the printer to ignore
the I-Prime signal.
Bottom Margin. Change to Invalid if you want the printer
to ignore the bottom margin setting. Caution! This can cause
loss of data and damage the printhead.
Centring Position. Choose DEFAULT, Mode 1 or Mode 2.
Help Guide
19
Language Set. Replaces certain standard symbols with Print Registration. Change the setting as required to obtain
special characters used in foreign languages.
the best registration for bidirectional printing.
Line Spacing. Change to 8 lpi to print more lines on a page. Print Suppress Effective. If your system uses the DC1 and
DC3 codes for something other than the print suppress mode,
change the setting to No.
Operator Panel Function. Change to Limited Operation to
deactivate the PRINT QUALITY and CHARACTER PITCH
buttons. This prevents these from being changed via the Proportional Spacing. Change the setting to Yes to engage
control panel when multiple people are using the printer.
proportional spacing of characters.
Page Length. Selects the length of the paper you are using. Receive Buffer Size. Selects the amount of memory devoted
to holding received data. Choosing 1 Line will tie up your
Page Width (Model 3321 only). Change to 8" to print on
computer while printing, but if you abort the print job, the
letter-size paper.
printer will stop much sooner.
Paper Out Override. Senses when less than 1" (25 mm) of
Reset Inhibit. Select Yes to prevent your software from
paper remains, and stops printing. Change toYes to override
resetting your printer's settings.
the sensor. Caution! This can cause loss of data and damage
the printhead!
SI Select Pitch, 10 cpi (IBM). Sets the pitch to be engaged
when the printer control panel is set for 10 cpi and the SI
command is received.
Pin 18. Sets the signal on pin 18 to +5 volts or to open.
Pitch. Choose the character width, in character per inch (cpi).
SI Select Pitch, 12 cpi (IBM). Sets the pitch to be engaged
when the printer control panel is set for 12 cpi and the SI
command is received.
Print DEL Code (ML). Change to Yes if you wish to print
the DEL code (decimal 27) as a solid box.
Print Mode. Choose the quality and speed of printing.
Size. Change to Double for double width and height printing.
20
ML3320/21
Skip Over Perforation. Change toYes if you want the printer
to go to the next page when it comes within 1" (25 mm) of
the bottom of the page. Keep it set to No if your software has
its own page formatting controls.
Using the Printer's Features
Tear Feature
Use this feature to advance continuous-form paper up to the
tear position by simply pressing TEAR (➊).
Slashed Letter O. If set toYes, capital and lower case slashed
O (Ø and ø) will appear at locations 9Bh and 9Dh respectively
in USA code page. If set to No, the characters “¢” and “¥”
will appear at these locations.
➊
SEL
FF/LOAD
TEAR
SET
PARK
QUIET
TOF
LF
SEL
Micro Feed
Down
Micro Feed
Up
SHIFT
MENU
PRINT
ITEM
EXIT
GROUP
POWER
ALARM
MENU
Style. Change to italics if you want the printed characters to
be slanted.
Note: The Tear Feature can not be used when the optional
pull tractor is engaged.
Time Out Print. If your software spends a long time
processing between portions of data it feeds to the printer,
change the setting to Invalid to keep your printer from
inadvertently dumping the received data while it is waiting
for more.
Forms Tear-Off Feature
Important! Never engage Forms Tear-Off when printing
on labels!
Wait Time. Sets the amount of time the printer will wait for
more data before moving to the form tear-off position.
Zero Character. If you do not want the printer to use a slash
to distinguish the number zero from the capital letter O,
change the setting to Unslashed.
The Forms Tear-Off feature automatically moves
continuous-form paper up to the tear position after the interval
you select, then moves it back down again for printing when
the printer receives more data.
Help Guide
21
This feature is normally turned off. To activate it:
Note: Some programs pause occasionally while sending
data. If the pause is too long, the paper will advance
to the tear-off position until more data is received.
This extra paper movement can cause uneven print
registration in graphics. If you have this problem,
use the menu to turn off this feature.
1. Press SHIFT (➋) + SEL (➊).
➊ ➋ ➌
➍
SEL
FF/LOAD
TEAR
SET
PARK
QUIET
TOF
LF
SEL
Micro Feed
Down
Micro Feed
Up
SHIFT
MENU
Paper Park Feature
PRINT
ITEM
EXIT
GROUP
➊
POWER
ALARM
MENU
SEL
2. Press GROUP (➌) until one of the following lines
FF/LOAD
TEAR
SET
PARK
QUIET
TOF
LF
SEL
Micro Feed
Down
Micro Feed
Up
SHIFT
MENU
appears, depending on which paper feed you are using:
PRINT
ITEM
EXIT
GROUP
POWER
ALARM
MENU
REAR FEED Form Tear-Off OFF
BOTTOM FEED Form Tear-OFF OFF
To retract rear-feed paper from the paper path, press PARK
(➊).
3. Press SET (➍) until the time interval you wish to select
appears in the third column.
4. Press SHIFT (➋) + SEL (➊) to exit Menu Mode and
save the setting.
22
ML3320/21
Emulations
Interface
Epson FX, IBM Proprinter III, and
Oki Microline Standard co-resident
Specifications
Print Method Impact dot matrix
Standard: Centronics parallel
Optional: RS-232C serial
Printhead
9 pins, 0.34mm diameter, thermal protection
Print Speed
Mode
Characters per second
435 cps
Graphics Resolution
Super Speed Draft (SSD)
High Speed Draft (HSD)
Utility (UTL)
Emulation
Maximum Resolution
387 cps
Epson/IBM
240 (H) x 216 (V) dpi
288 (H) x 144 (V) dpi
290 cps
Oki ML Std.
Near Letter Quality (NLQ) 72.5 cps
Resident Fonts
Characters per Line (CPL)
Setting ML3320
Print Quality
Available Fonts
ML3321
136 cpl
163 cpl
204 cpl
233 cpl
272 cpl
Near Letter Quality
Courier, Gothic
Gothic
10 cpi
12 cpi
15 cpi
17.1 cpi
20 cpi
80 cpl
Utility
96 cpl
High Speed Draft
Super Speed Draft
Gothic
Gothic
120 cpl
137 cpl
160 cpl
Bar Codes
Code 39, UPC A, UPC E, EAN 8, EAN 13,
Interleaved 2 of 5, Code 128, Postnet
Receive Buffer Size 28K
Help Guide
23
Reliability
Paper Specifications
Parameter
Reliability
Paper Type Feed
Weight
Width Range
Mean Time Between Failures 10,000 hours at 25% duty
Cut sheets
Top Only 58 - 90 g/m²
(14 - 24 lb.)
ML3320: 182.9-215.9
(7.2" - 8.5")
(MTBF)
cycle and 35% page density
ML3321: 182.9 - 363.2mm
(7.2 - 14.3")
Mean Time to Repair
(MTTR)
15 minutes
Single-part
continuous
forms
Rear,
45 - 90 g/m²
ML3320: 76.2-254mm
(3" - 10")
ML3321: 76.2-406.4mm
(3" - 16")
Printhead Life
200 million characters
average in 10 cpi draft mode
at 25% duty and 35% page
density
Bottom (12-24 lb.)
Carbonless
continuous
forms
Rear,
34 - 41 g/m²
ML3320: 76.2-254mm
(3" - 10")
ML3321: 76.2-406.4
(3" - 16")
Ribbon Life (on average,
10 cpi utility)
3 million characters
Bottom (9 - 11 lb.)
Paper Width
Minimum: 76.2mm (3")
Maximum, ML3320: 254mm (10")
Maximum, ML3321: 406.4mm (16")
Interleaf
continuous
forms
Rear,
Paper 38 - 45 g/m² ML3320: 76.2-254mm
Bottom (10 - 12 lb.)
Carbon 34 g/m²
(9 lb.)
(76.2 - 254mm)
ML3321: 76.2-406.4mm
(3" - 16")
Paper Weight
45 to 90 g/m² (12 to 24 lb.)
Labels
Bottom
Only
ML3320: 3" - 10"
(76.2 - 254mm)
ML3321: 3" - 16"
(76.2 - 406.4mm)
Paper Thickness
Rear Feed: 0.36mm (0.014") max.
Bottom Feed: 0.44mm (0.017") max.
24
ML3320/21
Paper Specifications (continued)
Environmental Requirements
Paper Type
Feed
Weight
Width Range
Parameter
Range
Envelopes,
single feed
Top Only 24 lb. max.
(90 g/m²)
165.1 - 241.3mm
(6.5" - 9.5")
Operating Temperature
Storage Temperature
Operating Humidity
Storage Humidity
41 to 104°F (5 to 40°C)
14 to 122°F (-10 to 50°C)
20 to 80% RH
Envelopes,
continuous feed,
non-overlap
Bottom
Only
24 lb. max.
(90 g/m²)
165.1 - 241.3mm
(6.5" - 9.5")
5 to 95% RH
Electrical Requirements
240 volts ac (+10%, -14%),
50/60 Hz (±2%)
Card stock
Bottom
Only
120 lb. max.
(178 g/m²)
N.A.
Transparencies
Top Only
—
215.9 - 279.4mm
(8.5" - 11")
This product complies with the requirements of the Council
Directives 89/336/EEC and 73/23/EEC on the approximation
of the laws of the member states relating to electromagnetic
compatibility and low voltage.
Dimensions (W x D x H)
ML3320: 389 x 345 x 116 mm
ML3321: 430 x 345 x 116 mm
Weight
ML3320: 7 Kg
ML3321: 9 Kg
Specifications subject to change without notice.
Help Guide
25
Index
A
F
L
Continuous-form paper
Auto
Factory settings, menu . 16-18 Label specifications .......... 24
jams, clearing .............. 2-4
specifications ................ 24
Control panel ................ 11-14
CR menu setting ........... 18
Form tear-off feature ......... 21
menu setting ................. 19
Front panel ................... 11-14
Language set menu
feed XT menu setting ... 18
LF menu setting............ 18
select menu setting ....... 18
setting ............................... 16
Lights, control panel ... 11, 14
Line spacing menu setting 17
D
G
M
Defaults, menu ............. 16-18
resetting ........................ 15
Dimensions ........................ 25
Draft mode menu setting .. 19
Graphics menu setting ...... 17
Graphics resolution ........... 23
B
Maintenance ..................... 1-7
Menu mode................... 14-21
Bar codes ........................... 23
Bottom margin menu
H
setting ............................... 17
O
Humidity requirements ..... 25
E
Operator panel function
C
Electrical requirements ..... 25
Emulation mode menu
setting ............................... 16
Envelope specifications..... 25
Environmental
I
menu setting ..................... 20
Card stock specifications .. 25
Centring position menu
setting ............................... 18
Character pitch .................. 14
Characters per line ............ 23
Character set menu
Indicator lights ............ 11, 14
Interface............................. 23
I-Prime menu setting ......... 19
P
Page length menu setting .. 20
Page width menu setting ... 20
Panel, front ................... 11-14
Paper
jams, clearing .............. 2-6
specifications ................ 24
Paper out override menu
setting ............................... 20
requirements..................... 25
J
Jams, paper ....................... 2-6
setting ............................... 16
Code page menu setting .... 16
26
ML3320/21
R
T
Paper park feature ............. 22 Rear feed paper
Tear-off feature .................. 21
Pin 18 menu setting........... 20
Pitch menu setting ............. 20
Print DEL code menu
jams.............................. 2-5 Temperature requirements 25
Receive buffer size ...... 20, 23 Time out print menu
Reliability .......................... 24
setting ............................... 21
Transparency
setting ............................... 20 Reset inhibit menu
Print mode menu setting ... 20
Print quality ....................... 13
Print registration menu
setting ............................... 20
Resident fonts .................... 23
Ribbon replacement ............ 1
specifications.................... 25
Troubleshooting ............. 8-10
setting ............................... 20
Print speed ......................... 23
Print suppress effective
W
S
Wait time menu setting ..... 21
Weight ............................... 25
SI select pitch menu
menu setting ..................... 20
Printhead specifications .... 23
Problem solving ............. 8-10
Proportional spacing
settings ............................. 20
Single sheet paper jams,
clearing............................... 6
Size menu setting .............. 20
Skip over perforation
Z
Zero character menu
setting ............................... 21
menu setting ..................... 20
menu setting ..................... 21
Specifications ............... 23-25
Style menu setting ............. 21
Help Guide
27
Oki Systems Company
Oki Systems (UK) Limited
550 Dundee Road
Slough Trading Estate
Slough
Berks. SL1 4LE
Tel: 01753-819819
Fax: 01753-819899
28
ML3320/21
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