OKI ML320, ML321 User Guide

Chapter 1 Printer Unpacking & Setup

Choose a sturdy table, desk or printer stand to place your printer on when you remove it from the carton. Remove the styrofoam sides be sure to save all packing materials in case you need to ship the printer again and check the box for these contents:

1) ML320/321 printer

2) Paper separator

3) Power cord

4) Platen knob

5) Ribbon cartridge

Note: Interface cable and paper are sold separately.

If any of these items is missing or damaged, see your dealer for a replacement.

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Setup Preliminaries

Preliminaries

Don't plug the printer in until its set up and ready to operate. If there is clear protective film on the access cover, remove the film. Open the access cover

and remove the shipping retainer (1). Be sure to save it with the other packing materials in case you ship the printer.

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Install The Paper Separator and Platen Knob

Open the rear cover of the printer (2). Holding the legs closed against the paper separator, place the tab on one side of the separator over the stud on the side of the rear cover (3). Pull gently on the other tab to slide it over the stud on the other side of the rear cover. Then close the rear cover. Insert the platen knob on the right side of the printer (4). Match the flatside of the knob to the flat side of the platen shaft.

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Connect to Power and Computer

Make sure the printer and computer are both OFF. Plug the power cord into the back of the printer(5). Plug the other end into a grounded outlet. Plug the interface cable into the parallel port on the back of your printer(6) Fasten the wire clips to the cable.

- Make sure the outlet is grounded. Do not use an adapter to defeat the grounding.

- These instructions are for the standard parallel interface. If you have the optional serial interface, see the instructions provided with it. Interface cables are sold separately.

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Install/Replace The Ribbon Cartridge

The printhead can get very hot during extended periods of printing be sure to let it cool off before you touch it. Be sure the power is off before you move the printhead.

Open the access cover. Position the printhead between the bail rollers (7). Make sure the bail is closed (bail lever toward back of printer).

Install/Replace the Ribbon Cartridge

ÎBe sure to use only ribbons specifically for MICROLINE 320/321 or MICROLINE 100 Series printers. Ribbon cartridges for ML390/391 printers look similar, but they will not fit in the ML320/321.

For best result use genuine OKIDATA ribbons, part number 52102001.

If you're replacing the ribbon cartridge, swing the front of the cartridge up off the printhead, then lift the cartridge out and discard it. Hold the new ribbon cartridge with the knob facing up and the flat end toward the front of the printer. Place the flat end into the ribbon plate(8) then lower the front of the cartridge over the printhead until it snaps into place (9). Turn the knob in the direction of the arrow to take up the slack in the ribbon.

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Set the Headgap

The headgap lever (10) by the side of the cartridge adjusts for different paper thicknesses.

Set it to:

1 for one- or two-part forms, 2 for three- or four-part forms, 3 for envelopes and extra-thick paper

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Chapter 2 Loading Rear-Feed, Continuous Forms

Loading Rear-Feed, Continuous Forms

- Do not position the left edge of the paper more than 1/2 from the end of the platen. The

paper must cover the groove in the left side of the platen; if it doesnt, the printer will signal a paper out alarm. There are reference marks on the printer to show the recommended left edge position for the two most common paper sizes.

Make sure the paper lever is forward, and open the access cover and rear cover to expose the tractors (1). Pull the lock levers (2) forward and slide the left tractor into position for the paper size you're using. Slide the right tractor to fit the paper width. Push the levers back to lock them.

Loading Rear-Feed, Continuous Forms

- Check the Addendum ( Open the tractor covers (3).

Pull the paper through the opening between the printer and the rear cover and place the first two sprocket holes on each side of the page over the pins (4).

) for details on paper specifications.

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Close the rear cover (make sure the paper separator is flat on the printer), open the guide wire, and close the access cover (5).

Turn the printer on. The printhead will move and the control panel will light up. The ALARM light will also come on. Pull the bail lever forward (6). The paper will automatically feed into the printer and the ALARM light will go out. If paper doesn't feed, check to make sure that the paper lever is in the forward position.

- Do not use the Form Feed button to load paper. Push the bail lever back to close the bail (8).

Adjust the top of form (see page 13( )), then press the and you're ready to print.

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SEL

button ( the SEL light will go on)

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Loading Single Sheets

Note: If you already have continuous form paper in the printer, tear off any printed pages, then press the PARK button to back it out of the paper path. The and the

Push the paper lever back (1).

light will go off.

SEL

ALARM

light will go on

Push the guide wire back (2).

Raise the separator to its upright position (3).

Set a sheet of paper on the separator and adjust the guides so that they're barely touching the edges of the paper. Pull the bail lever forward. The paper will automatically feed into the printer. (Theres a reference mark on the separator for the left paper edge.)

Push the bail back (4) and adjust the top of form.

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Setting Top of Form

Note: Make sure the paper is held in place by the bail. If the top of the page is set below the bail, paper will catch on the bail and cause a jam. The amount you can move the paper down using this method is limited to avoid potential paper jams.

Make sure the printer is deselected. Hold down the

FORM FEED LINE FEED

This moves the paper in 0.007 increments. The lower red line on the paper shield shows the baseline of the current printing position to help you place the top of form.

When the top of form is set where you want it, the position is recorded permanently in the printers memory even when the printer is turned off until you reset it.

If youre using continuous forms, you can temporarily change the setting to another

Note:

location without disturbing your normal setting.

- To do this, first make sure the printer is deselected (press the

- Then press the to move the paper to the new location you want to set for the top of form.

- Once youve positioned the paper where you want it, press the engage the location as your temporary top of form.

The printer will retain this temporary setting until its turned off. To restore your normal top of form setting, turn the printer off and then on again.

to move the paper up, or

to move the paper down.

LINE FEED

button (without holding down the

TOF/QUIET

button and press:

button if its not).

SEL

TOF/QUIET

button)

button to

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Form Tear Off

Note: Don't use forms tear off when printing on labels or multipart forms. Labels should only be fed from the bottom of the printer.

To activate this feature, press the to change the FORM TEAR OFF setting to 500 ms (1). (See Chapter 5 ( use the menu). Press the and

FORM FEED

When you release the

under the clear top of the access cover (3).

Note: You can check the initial printing position at any time: press the press

TOF/QUIET

the button. The page stays in the tear off position until the printer receives data; then moves down to

the printing position to print. Afew seconds after printing stops, the paper moves up to the tear off position.

; the paper will move down to the initial printing position until you release

MODE

LINE FEED

TOF/QUIET

MODE

button to exit the Menu mode, then use the

buttons to set the top of form as described above (2).

button and use the

button, the paper advances to the tear bar, located

GROUP, ITEM

and

SET

) for details on how to

TOF/QUIET

button, then

SEL

buttons

Note: Some programs pause occasionally while sending data. If the pause lasts more than two seconds, 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 deactivate forms tear off.

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+ 25 hidden pages

OKI ML320, ML321 User Guide

Specifications and Main Features

Frequently Asked Questions

User Manual

Loading Single Sheets

Setting Top of Form

Form Tear Off