Oki ML620 User Manual
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Oki ML620 User Manual

Ml620, ml621 users' guide - english
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See also: Instruction and Installation Manual , Installation Manual
ML620/ML621
RT322
User's Guide
59320101
my.okidata.com

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  • Page 1 ML620/ML621 RT322 User's Guide 59320101 my.okidata.com...
  • Page 2 Oki Data assumes no responsibility Corp. for the results of errors beyond its control. Oki Data also cannot guarantee Microsoft and Windows are either registered trademarks or trademarks that changes in software and equipment made by other manufacturers and of Microsoft Corporation in the United States and other countries.

  • Page 3: Table Of Contents

    Potential Problems with Software Packages ......30 Changing the Forms Tear-Off Setting ........31 Printer Features ..................5 Manual Forms Tear Off .............31 Oki Data on the Internet ............5 Paper Park ....................32 Parts Identification: Front View ............6 Setting the Paper Thickness Lever ............32 Parts Identification: Rear View .............7...
  • Page 4 Appendix A: Parts & Accessories ..........88 Paper Specifications ...............100 Purchasing Parts & Accessories ............88 Consumables ..................89 Accessories ..................89 Appendix B: Printer Control Codes ........... 90 IBM Proprinter III Commands .............90 Epson FX Commands .................93 Oki MICROLINE Standard Commands ..........95 ML620/ML621 User’s Guide...

  • Page 5: Chapter 1: Introduction

    Chapter 1: Introduction Oki Data on the Internet Printer Features The Oki Data Web Sites provide the most current information available on your printer. Super reliable, durable operation: 25,000 hours  On-line documents are available for viewing and Mean Time Between Failures (MTBF) at 25% duty downloading via Oki Data’s Web Sites.

  • Page 6: Parts Identification: Front View

    Parts Identification: Front View Sheet Guide, Rear Paper Type Lever Platen Knob Sheet Guide, Front (open to fit the front feed paper tray or the tractor) Control Panel On-Off Switch Access Cover ML620/ML621 User’s Guide...

  • Page 7: Parts Identification: Rear View

    Parallel connector Ribbon Cartridge Optional Serial/Network connector Print Head Ventilation Pull-up Guide Assembly Power Connector Optional Cut Sheet Feeder/Roll Paper Stand connector Note: The serial number of your printer is on a label on the back, beside “S/N.” ML620/ML621 User’s Guide...

  • Page 8: The Control Panel

    () or retract () the paper in mode use the purple text labels underneath the keys to identify the small increments function of each key. The lines above the square Keys work differently according to which “mode” is active. indicate a flashing light ML620/ML621 User’s Guide...
  • Page 9 ON again. When flashing together with the light, indicates the Top TEAR Cover is open. TEAR Green Printer is in Menu mode. Printer is in Tear down position. Flashing Printer is in Tear up position. ML620/ML621 User’s Guide...
  • Page 10 > Indicates COURIER is selected. > LED 1 and 3 > Indicates GOTHIC is selected. > LED 1 and 2 > Indicates OCR-B is selected. Flashing With light flashing: ALARM > LED 2 > Indicates an incorrect Paper Lever setting. ML620/ML621 User’s Guide...
  • Page 11 > NORM (Normal Speed) is selected. > LED 1 > HIGH SPEED is selected. > LED 1 and 2 > QUIET print is selected. Flashing > LED 2 > HIGH COPY is selected. SLEEP Green Flashing Low power consumption mode. ML620/ML621 User’s Guide...

  • Page 12: Print Mode Key Functions

    On-line / Off-line Press the key to toggle through the character pitch options. CHR PITCH On-line / Off-line Press the key to toggle through the print speed options. PRINT SPEED SEL + LF/FF On-line / Off-line No effect. ML620/ML621 User’s Guide...
  • Page 13 Performs a forward line feed of 1/144” when paper is in the tear position. TEAR + LF/FF On-line / Off-line Performs a reverse line feed of 1/144” when paper is in the tear position. Online / Offline Enters/Exits Menu Mode. CHR PITCH + PRINT SPEED ML620/ML621 User’s Guide...

  • Page 14: Chapter 2: Paper Handling

    Tearing Off Continuous Forms Paper  Aligning the Tear-Off Perforations  Removing Continuous Forms Paper  Loading Cut Sheet Paper  Cut Sheet Paper, Top and Front Feed  Ejecting Cut Sheet Paper  Notes on Different Types of Paper  ML620/ML621 User’s Guide...

  • Page 15: Loading Continuous Forms Paper

    24” (61 cm) from any wall. There are three ways to load continuous forms paper. See the following pages for instructions. Bottom feed (optional pull tractor)  Rear feed  ML620/ML621 User’s Guide...

  • Page 16: Rear Feed

    Make sure the printer is turned ON. Lock Lever Make sure the Paper Type lever is in the REAR Upper Tractor Cover feed position: Pins Open the access cover (1) and set the Paper Thickness lever to suit the paper. Close the cover. ML620/ML621 User’s Guide...
  • Page 17 (2) on each side and pinch them together to release the guide. Remove it from the front and insert it into the back feed and when it is seated, push down to snap the guides in place. Close the front access door. ML620/ML621 User’s Guide...
  • Page 18 Move the rear paper guide to midway between change the setting, see “Top of Form (TOF)”. the left and right tractor pins. Open the tractor covers. Place continuous forms paper on the first two pins of either tractor. ML620/ML621 User’s Guide...

  • Page 19: Front Feed

    Front Feed Make sure the Paper Type lever is in the FRONT feed position. Lock Lever Upper Tractor Cover   Pins Pull down the door to open the front sheet guide (1). ML620/ML621 User’s Guide...
  • Page 20 Open the tractor covers and place continuous forms paper on the first two pins of either tractor, then close the left tractor cover. ML620/ML621 User’s Guide...

  • Page 21: Bottom Feed (Optional Pull Tractor)

    Pin Tractor. Turn the printer ON. Lift the locking lever of the right pin tractor and slide the Pin Tractor to the required position to Press the key to feed paper to the tractor. LF/FF ML620/ML621 User’s Guide...

  • Page 22: Tearing Off Continuous Forms Paper

    Check the position of the tear-off perforations Lift the pin tractor covers and remove the forms. relative to the paper cutter. Adjust to the desired Close the pin tractor covers. ML620/ML621 User’s Guide...

  • Page 23: Loading Cut Sheet Paper

    Place the Paper Type lever in the cut sheet position: To load the cut sheet in the Top Feed Paper tray, raise the top tray. To load the cut sheet in the Front Feed Paper tray, open the front cover and install the front paper tray. ML620/ML621 User’s Guide...
  • Page 24 > When printing an envelope, do not open up the flap. > If you are feeding thick paper, push it in sufficiently until it touches the feed roller to avoid the possibility of skewed printing or paper jams. ML620/ML621 User’s Guide...

  • Page 25: Ejecting Cut Sheet Paper

    — that is, the maximum thickness. If the Paper Thickness Lever is set for the thinnest part of the envelope the print density may fluctuate. Glossy paper: Test paper with a glossy finish  ML620/ML621 User’s Guide...

  • Page 26: Top Of Form (Tof)

    500 ms, 1 sec, or 2 sec) or OFF (the factory default Top of Form sets the print start position for the setting). printer. It is adjustable in increments of 1/144 of an inch. The first line prints at the default top of form. ML620/ML621 User’s Guide...

  • Page 27: Determining If Forms Tear-Off Is Off Or On

    To print the Menu: Make sure paper is loaded. Press the key (1). Hold down the (2) key and press the CHR PITCH key (3). PRINT SPEED Press the (4) key to print the PRINT QUALITY menu. ML620/ML621 User’s Guide...

  • Page 28: Setting Top Of Form (Tof)

    When you have the TOF set where you want it, press and hold , then press to save the LF/FF new setting. Note: To reset the Top of Form to the factory default, see “Resetting Top of Form to the Factory Default” later in this chapter. ML620/ML621 User’s Guide...

  • Page 29: Temporarily Changing The Top Of Form Position

    To move the Top of Form position lower for one page only: Turn the printer off. Press and hold while turning on the Press to deselect the printer. LF/FF + TEAR printer. Press to lower the position of the Top of Form. Reload paper. ML620/ML621 User’s Guide...

  • Page 30: Forms Tear-Off Feature

    (see next page). tear bar (located under the access cover), after the time interval which you selected through the menu. Paper remains in the tear-off position until the printer receives more data. Then, the paper moves ML620/ML621 User’s Guide...

  • Page 31: Changing The Forms Tear-Off Setting

    Press repeatedly until Form Tear-Off appears ITEM in the second column: Rear Feed Form Tear‑Off Manual Press until the time interval you wish to select appears in the third column: Rear Feed Form Tear‑Off 1 Sec ML620/ML621 User’s Guide...

  • Page 32: Paper Park

    Move the paper Release Lever to the Cut Sheet position. Load the cut sheet of paper. To activate the continuous form paper again: Remove cut-sheet paper from the printer. Move the paper Release Lever to Continuous. Press the key. LOAD/EJECT ML620/ML621 User’s Guide...

  • Page 33: Paper Type Table

    4-part Χ work properly. 5-part Χ To avoid possible pin breakage/ribbon snagging, do 6-part Χ not print on bank books. 7-part Χ When lever positions 5‑10 are selected, printing quality for carbon paper may decline. ML620/ML621 User’s Guide...

  • Page 34: Chapter 3: Print Settings

    Chapter : Print Settings This section describes how to set and manage: Print Quality  Character Pitch  Print Speed  Emulations  For more print setting options, see the Menu settings in chapter 4. ML620/ML621 User’s Guide...

  • Page 35: Print Quality

    Note: Available Print Quality settings depend on which key. Each time the key is pressed the light sequence Character Pitch setting is selected. above the key changes until all the PRINT QUALITY options have been cycled through. ML620/ML621 User’s Guide...

  • Page 36: Character Pitch

    “20 CPI.” CHARACTER PITCH To change the press the CHARACTER PITCH CHR PITCH key. Each time the key is pressed the light sequence above the key changes until all the CHARACTER PITCH options have been cycled through. ML620/ML621 User’s Guide...

  • Page 37: Print Speed

    “Normal.” PRINT SPEED To change the press the PRINT SPEED PRINT SPEED key. Each time the key is pressed the light sequence above the key changes until all the PRINT SPEED options have been cycled through. ML620/ML621 User’s Guide...

  • Page 38: Emulations

    Printer Control Emulation Mode IBM PPR Press repeatedly until the emulation you TEAR wish to select prints in the right-hand column. Hold down the key and press the CHR PITCH PRINT key to exit Menu Mode. SPEED ML620/ML621 User’s Guide...

  • Page 39: Chapter 4: Menu Mode

    See the Menu Settings Table for a complete list of all the menu options. Features include Printer Control, Font, Symbol Sets, Rear Feed (Push), Front Feed (Push), Pull, Cut Sheet (Top), Cut Sheet (Front), and Setup. ML620/ML621 User’s Guide...

  • Page 40: Menu Mode Keys And Functions

    Set options. is pressed the next Item menu is printed. When the item you want to CHR PITCH + Exits MENU mode. change is displayed, use the PRINT SPEED to cycle through that item’s options. ML620/ML621 User’s Guide...

  • Page 41: Entering And Exiting Menu Mode

    Press and hold down the key and then TEAR Hold down the key and press the CHR PITCH PRINT press the key again to put the printer online. key. This toggles the menu off (i.e., “exits” SPEED the Menu). ML620/ML621 User’s Guide...

  • Page 42: Printing The Menu Settings

    CHR PITCH key. PRINT SPEED Important! Press the key. PRINT QUALITY If you turn off the printer without first exiting the Menu Mode, the changes you have made will be lost. ML620/ML621 User’s Guide...

  • Page 43: Menu Settings Table

    DRAFT. Selects the draft mode to be used: HSD (High Speed Draft) or SSD (Super Speed Draft). Pitch Choose the character width, in 10 cpi, 12 cpi, 15 cpi, 17.1 cpi, 20 characters per inch (cpi). ML620/ML621 User’s Guide...
  • Page 44 Spanish II, Latin American, French Canadian, Dutch, Publisher Zero Character If you do not want the printer Slashed, Unslashed to use a slash to distinguish the number zero from the capital letter O, change the setting to Unslashed. ML620/ML621 User’s Guide...
  • Page 45 774, KBL-Lithuanian, Cyrillic Latvian, Roman-8, Icelandic-861, Multilingual 858, ISO 8859-15, Greek_737, POL 1, Macedonian, BRASCII, Abicomp Rear Feed Line Spacing Change to 8 lines per inch (lpi) to 6 LPI, 8 LPI (Push) get more lines on a page. ML620/ML621 User’s Guide...
  • Page 46 1” (25 mm) of the bottom of the page, change the setting. Page Width (only Change to 8” to print on narrow 13.6”, 8” displayed for ML621) paper. ML620/ML621 User’s Guide...
  • Page 47 –20 ~ –1, 0, +1 ~ +20 the reference position for the Top of Form position of a continuous form. The position moves to the bottom edge of the page (+) and to the top edge of the page (–) in 1/144” increments. ML620/ML621 User’s Guide...
  • Page 48 Centering Position Used to limit printhead travel Default, Mode1, Mode2 when printing narrow columns. Select Mode 1 for ML620. Select Mode 1 or Mode 2 for the ML621. Front Feed Line Spacing Change to 8 lines per inch (lpi) to...
  • Page 49 (152.4 mm), 7” (177.8 mm), 8” (203.2 mm), 8.5” (215.9 mm), 11” (279.4 mm), 11.7” (296.3 mm), 12” (304.8 mm), 14” (355.6 mm), 17” (431.8 mm) Initial Position Paper position (print or cut) when Print position, Cut position printer is powered on. ML620/ML621 User’s Guide...
  • Page 50 10/12” (21.17 mm), 11/12” (23.28 mm), 12/12” (25.40 mm), 13/12” (27.52 mm), User Top of Form LF Revise (Continuous For continuous feed, adjusts the –2, –1, 0, +1, +2 Paper Line Feed Adjust) line feed to the specified amount. ML620/ML621 User’s Guide...
  • Page 51 Centering Position Used to limit printhead travel Default, Mode1, Mode2 (Push) when printing narrow columns. Select Mode 1 for ML620. Select (cont.) Mode 1 or Mode 2 for the ML621. Pull Line Spacing Change to 8 lines per inch (lpi) to 6 LPI, 8 LPI get more lines on a page.
  • Page 52 Centering Position Used to limit printhead travel Default, Mode1, Mode2 when printing narrow columns. Select Mode 1 for ML620. Select Mode 1 or Mode 2 for the ML621. Cut Sheet Line Spacing Change to 8 lines per inch (lpi) to...
  • Page 53 Invalid, 0.5 sec, 1 sec, 1.5 sec, the paper is set on the tray to 2 sec, 3 sec when the printer feeds it. Paper Length Control Specify the page length of a cut by Menu Setting, by Actual Page sheet. Length ML620/ML621 User’s Guide...
  • Page 54 (16.93 mm), 9/12” (19.05 mm), 10/12” (21.17 mm), 11/12” (23.28 mm), 12/12” (25.40 mm), 13/12” (27.52 mm), User Top of Form LF Revise Adjust the line feed in cut sheet –14 ~ –1, 0, +1 ~ +14 mode. ML620/ML621 User’s Guide...
  • Page 55 Centering Position Used to limit printhead travel Default, Mode1, Mode2 Top Feed when printing narrow columns. Select Mode 1 for ML620. Select (cont.) Mode 1 or Mode 2 for the ML621. Cut Sheet Line Spacing Change to 8 lines per inch (lpi) to...
  • Page 56 (up to the mid-section of mm), 7/12” (14.82 mm), 8/12” characters in the first line). (16.93 mm), 9/12” (19.05 mm), 10/12” (21.17 mm), 11/12” (23.28 mm), 12/12” (25.40 mm), 13/12” (27.52 mm), User Top of Form ML620/ML621 User’s Guide...
  • Page 57 Centering Position Used to limit printhead travel Default, Mode1, Mode2 (cont.) when printing narrow columns. Select Mode 1 for ML620. Select Mode 1 or Mode 2 for the ML621. Set-Up Graphics Set the printing direction when a Bi-directional, Uni-directional line has double-height print data.
  • Page 58 The position moves to the right or left in 1/720” increments. 7 or 8 Bits Data Word Change this setting to 7 if your 8, 7 (only displayed for ML system uses 7-bit data word Emulation) lengths. ML620/ML621 User’s Guide...
  • Page 59 Line Feed is received at the end of a line, change the setting to “Yes.” Print DEL Code To print the DEL code (decimal 27) No, Yes (only displayed for ML as a solid box, set to Yes. Emulation) ML620/ML621 User’s Guide...
  • Page 60 If you always use the same Top of Form position, keep the default setting of “Yes”. When set to “No”, the printer will be deselected so that you can set the Top of Form. ML620/ML621 User’s Guide...
  • Page 61 In Mode1, the printer makes one pass; in Mode2, two passes. Select High Copy Mode High copy modes set the printer Mode1, Mode2, Mode3, Mode4 to print more forcefully. Mode1 is a double-strike print; Mode2 is triple-strike, etc. ML620/ML621 User’s Guide...
  • Page 62 (when Sleep 60 min Mode is enabled). Paper End In default setting when paper end On-line, Off-line is detected, printer remains on- line; if set to Off-line, when paper end is detected, printer goes off- line. ML620/ML621 User’s Guide...
  • Page 63 Invalid: causes the printer to ignore the I-Prime command. Select this setting if you wish to enter settings through the printer’s control panel which will not be automatically overridden by the software’s settings when the I-Prime signal is sent. ML620/ML621 User’s Guide...
  • Page 64 To perform input/output diagnosis No, Yes of RS-232C interface signals, set to Yes. Busy Line If Ready/Busy protocol (factory SSD–, SSD+, DTR, RTS default) is selected, you can choose which line your system monitors for a busy signal. ML620/ML621 User’s Guide...
  • Page 65 Stop Bit Set the stop bit length. 1 bit, 2 bit Receive Error When “checked” is selected the Checked, Unchecked printer checks for the correct number of bits and sends an error if an incorrect number is found. ML620/ML621 User’s Guide...
  • Page 66 –20 ~ –1, 0, +1 ~ +20 reference position in regard to the TOF position of a cut sheet paper. The position moves to the bottom edge of the page (+) and to the top edge of the page (–) in 1/144” increments. ML620/ML621 User’s Guide...
  • Page 67 Centering Position Used to limit printhead travel Default, Mode1, Mode2 when printing narrow columns. Select Mode 1 for ML620. Select Mode 1 or Mode 2 for the ML621. Extension Detect Sprocket Hole For continuous paper set to be Enable, Disable...
  • Page 68 Displayed only when the roll paper stand (RPS) is connected. Displayed only for ML emulation. Displayed only for IBM emulation. ML620/ML621 User’s Guide...

  • Page 69: Chapter 5: Maintenance

    Pull Up Roller Assembly. Leave unused ribbon cartridges in their  packages until needed. Careful; the ribbon ink may cause permanent  stains. Ribbon ink on skin or clothing can usually be  removed with soap and water. ML620/ML621 User’s Guide...
  • Page 70 Holding the sides of the ribbon guide slope it downward until the ribbon guide comes in line with the slot of the printhead. In the direction indicated by the arrows, ML620/ML621 User’s Guide...
  • Page 71 Do not turn the knob counterclockwise as the ribbon may jam. Make sure that the ribbon is not twisted or damaged when it goes through the gap between the printhead and the ribbon guide. Close the access cover and turn the printer back ML620/ML621 User’s Guide...

  • Page 72: If Ribbon Should Contact The Eyes

    Continuous Feed Paper Jams and pulling it up from the printer. WARNING: Do not carry out any operations inside the printer with the Power Switch set to ON. Make sure the printer is turned OFF. Open the access cover. ML620/ML621 User’s Guide...
  • Page 73 Tractors and turn the platen knob to push the fragment out of the printer. When the paper jams are cleared, lower the top Paper Tray and slide it towards the front of the printer until the marks align. ML620/ML621 User’s Guide...

  • Page 74: Cut Sheet Paper Jams

    Set the Paper Thickness Lever to position 10. Tray and turn the platen knob to pass the folded sheet through and push out the paper fragment. CAUTION! The printhead may be HOT! Remove the ribbon cartridge. See “Replacing the Ribbon Cartridge.” ML620/ML621 User’s Guide...

  • Page 75: Cleaning The Printer

    (or after about 300 hours of operation). Moisten a piece of cotton cloth with diluted neutral detergent and carefully wipe the printer exterior. CAUTION! Never use strong solvents or strong detergents on the cabinet—they could damage the housing. ML620/ML621 User’s Guide...

  • Page 76: Printer Interior

    Open the access cover and remove the pull-up roller assembly. Use a clean, dry cloth to dust around the carriage shaft and platen. Remove any loose bits of paper. Reinstall the pull-up roller assembly and close the access cover. ML620/ML621 User’s Guide...

  • Page 77: Testing The Printer

    8.5 inches. Otherwise, printing on the platen may damage the printer. See Chapter 4: Menu Mode for more information. ML620/ML621 User’s Guide...

  • Page 78: Rolling Ascii Test

    8.5 inches. Otherwise, printing on the platen may damage the printer. See Chapter 4: Menu Mode for more information. ML620/ML621 User’s Guide...

  • Page 79: Hexadecimal Dump Mode

    LOAD/EJECT key. would print like this: To exit the Hexadecimal Dump Mode: Turn the printer off.  Note: In the ASCII format, all non‑printable characters are represented by a period. ML620/ML621 User’s Guide...

  • Page 80: Chapter 6: Troubleshooting

    Is the paper properly installed?  Is the ribbon properly installed?  Is an Oki ribbon being used?  Is the printhead gap correctly set?  Are the correct printer drivers being used for the ...

  • Page 81: Responding To Alarm Conditions

    Insert paper. Flashing Flashing Printing cannot be resumed at this stage. Turn the power OFF, verify that the carriage moves properly, then turn the power ON again. If the indicator lights continue to flash, contact your dealer. ML620/ML621 User’s Guide...

  • Page 82: Problems / Solutions

    When the printer is powered ON, switch from position is offset. printer is powered on. off-line mode to on-line mode by pressing key. Reset the start position. You must set the Power Switch to OFF before you change the start position. ML620/ML621 User’s Guide...
  • Page 83 Printout contains completely Incorrect print setup for the user’s Reselect print setup for the applications different characters or application. according to priority. symbols. The application control codes for the Initialize the printer. previous print operation are still enabled. ML620/ML621 User’s Guide...
  • Page 84 The paper setting does not match the lines Leave enough top and bottom margin in the per page automatically detected by the application. printer. Correct the cut sheet LF adjustment. ML620/ML621 User’s Guide...
  • Page 85 Paper with wrinkles, folds, or other defects. Change paper. Paper not specified for the printer. Use paper types specified for the printer. Unable to eject. key was pressed. Press the key. LF/FF LOAD/EJECT ML620/ML621 User’s Guide...
  • Page 86 No cut sheet feed. The printer is in continuous forms mode. Set the Paper Type lever to cut sheet mode. No continuous forms feed. The printer is in cut sheet mode. Set the Paper Type lever to continuous forms mode. ML620/ML621 User’s Guide...
  • Page 87 PROBLEM CAUSE SOLUTION Paper feed operations for The cut sheet is not ejected. Eject the cut sheet. both cut sheets and continuos forms are actuated. ML620/ML621 User’s Guide...

  • Page 88: Appendix A: Parts & Accessories

    Appendix A: Parts & Accessories In the United States, purchase directly from Oki  Data Purchasing Parts & Accessories Via the Internet  Before you purchase, know your printer model www.okiprintingsolutions.com number (see the front of the unit) and have the correct part number and description of the item.

  • Page 89: Consumables

    44454901 Ribbon 44173404 Cut Sheet Feeder 44497401 Model ML621 Tractor Assembly (Pull) 44754001 Tractor Assembly (Push) 44455001 Cut Sheet Feeder 44497501 Both Models LAN Card (100BASE-TX/10BASE-T 72008701 Network Interface) RS-232C Serial Interface 44455101 Roll Paper Stand 70023301 ML620/ML621 User’s Guide...

  • Page 90: Appendix B: Printer Control Codes

    Select 20 cpi ESC SI 27 15 Click Documentation and follow the on-screen prompts to view the file. Select Condensed Print SI Character Sets IBM Set I ESC 7 27 55 IBM Set II ESC 6 27 54 ML620/ML621 User’s Guide...
  • Page 91 Set Spacing to n/144” Italics Off ESC % H 27 37 72 (n = 1 to 127) ESC % 9 n 27 37 57 n Set Spacing to n/216” (n = 0 to 255) ESC 3 n 27 51 n ML620/ML621 User’s Guide...
  • Page 92 ESC Q ETX 27 81 3 ML621 ESC Q SYN 27 81 22 Print Suppress Mode Off Proportional Spacing On ESC P 1 27 80 49 Proportional Spacing Off ESC P 0 27 80 48 Reset: Clear Print Buffer ML620/ML621 User’s Guide...

  • Page 93: Epson Fx Commands

    ESC H 27 72 Reverse, n/216” Epson Set 1, Select ESC t 0 27 116 48 (n = 0 to 255) ESC j n 27 106 n Epson Set 2, Select ESC t 1 27 116 49 ML620/ML621 User’s Guide...
  • Page 94 27 107 48 ESC U 1 27 85 49 Select Gothic ESC U 0 27 85 48 (NLQ only) ESC k 1 27 107 49 Vertical Tab, Execute Select Draft ESC x 0 27 120 48 Print Speed ML620/ML621 User’s Guide...

  • Page 95: Oki Microline Standard Commands

    27 31 49 1/3” increments Double Height Off ESC US 0 27 31 48 (n = 1 to 9) ESC G n n 27 71 n n Double Width Printing Default ESC % S 0 27 37 83 48 ML620/ML621 User’s Guide...
  • Page 96 Print Speed, Set to Half ESC < 27 60 Print Suppress On Print Suppress Off Proportional Printing ESC Y 27 89 ESC Z 27 90 Reset: Clear Print Buffer Shift-In Shift-Out Software I-Prime ESC } NUL 27 125 0 ML620/ML621 User’s Guide...

  • Page 97: Appendix C: Specifications

    Appendix C: Specifications Reliability Note: Specifications are subject to change without Ribbon Life notice. ML620: approx. 8 million characters (Utility Mode) Print Method ML621: approx. 13 million characters (Utility Mode) Impact dot matrix Emulations (co-resident) Printhead IBM Proprinter III ...

  • Page 98: Print Speed

    12 cpi 96 cpl 163 cpl Utility (Draft) Gothic 15 cpi 120 cpl 204 cpl High Speed Draft (HSD) Gothic 17.1 cpi 137 cpl 233 cpl Super Speed Draft (SSD) Gothic 20 cpi 160 cpl 272 cpl ML620/ML621 User’s Guide...

  • Page 99: Bar Codes

    3.7 W (with full options attached) Temperature Operating: 41 to 95° F (5 to 35° C) Storage: 14 to 122° F (–10 to 50° C) Humidity Operating: 20 to 80% RH Storage: 5 to 95% RH ML620/ML621 User’s Guide...

  • Page 100: Paper Specifications

    3 – 16” (76.2 – 406.4 mm) Single-part weight 45 – 90 g/m Single-part 0.002 – 0.0049” (0.05 – 0.12 mm) Thickness Multi-part weight 35 – 40 g/m Multi-part 0.015” (0.36 mm) total thickness Thickness 0.019” (0.48 mm) total thickness bottom path only ML620/ML621 User’s Guide...

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