Oki ML420 Support Question
Oki ML420 Support Question
Find answers below for this question about Oki ML420.Need a Oki ML420 manual? We have 17 online manuals for this item!
Question posted by edwardg2003 on June 16th, 2015
If The Push Tractor, Bottom-mounts Are Stuck In A 'closed' Position How Can You
The push tractor, bottom mounts are stuck closed on my Oki ML-420. How do I get them open up again?
Current Answers
Answer #1: Posted by TechSupport101 on June 16th, 2015 6:51 PM
TechSupport101
Member since:
May 24th, 2013 Points: 12,171,295
Member since:
May 24th, 2013 Points: 12,171,295
There is a maintenance manual here for the model that should be able to walk you through with precision.
Related Oki ML420 Manual Pages
Microline 420/421 & 490/491 Setup Guide - Page 12
Position right-hand tractor for width of paper. Pull up on printer. 3. Open the tractor covers (2). Microline 420/421 & 490/491
1. Locate tractors. See paper size reference marks on tractor lock levers (1) to release tractors. 2. This action raises the paper separator.
12 Above view is from rear.
Microline 420/421 & 490/491 Setup Guide - Page 15
Position left tractor so that paper holes are centered on lock lever (2) to lock tractor.
15 Push down on pins and paper is not stretched or too loose which could cause jams. Close tractor cover (1).
2. Microline 420/421 & 490/491
1.
Microline 420& ML490 Series Warranty, Regulatory, and Safety Information - Page 3
...the machine for your local power provider.
This product may be closed or replaced and secured to prevent risk of this may lead to...to prevent any operations on the product as directed in final position for future reference. If the product is adequate ventilation all..., fire and/or injury. When the product cover is open or doors removed as the product contains high temperature parts ...
Guide: User's, ML420/421 (English) - Page 7
... current information available on your printer.
You may reach Oki Data via Oki Data's Web Sites. Utility Mode: 380 cps - On-line documents are available for viewing and downloading via the Internet at 25% duty cycle and 35% page density
• Advanced paper handling, with built-in rear push tractor and zero-tear forms capability...
Guide: User's, ML420/421 (English) - Page 8
... provides support via the Internet:
• www.okidata.com is the main web site, the gateway to Oki Data's products and services.
• http://my.okidata.com is normally turned off position until the printer receives more information, see "Paper Park" in Chapter 3.
8
Chapter 2: Helpful Hints
Saving Money: Forms Tear-Off
The Forms...
Guide: User's, ML420/421 (English) - Page 11
Using Your Printer 11 Parts Identification: Top Feed (Single Sheets)
Paper Guides Sheet Guide Paper Lever On-Off Switch Platen Knob Control Panel Acoustic Cover (open)
Note: For single-sheet printing, the paper lever must be in the middle position.
Guide: User's, ML420/421 (English) - Page 12
...) and Forms Tear-Off
Note: Your software may need to adjust the TOF to meet your printer interact. Top of Form sets the print start position for the Top of Form (where the printing should begin) is On (set to avoid paper... 1/144 of Form (TOF)
Important! How you turn the platen knob when the printer is limited to 500 ms, 1 sec, or 2 sec) or OFF (the factory default setting).
12 Microline...
Guide: User's, ML420/421 (English) - Page 17
... are using "pauses" for top feed roll paper (with the optional push tractor installed) or for a long enough interval while sending data to the paper movement.
Note: You can be activated. Forms Tear-Off cannot be torn off position until the printer receives more data. Potential Problems with Software Packages
If Forms Tear-Off...
Guide: User's, ML420/421 (English) - Page 18
... continuous form paper from the printer. Paper Park
Important! When you can advance
• rear-feed continuous forms loaded on the optional push tractor
up to the tear off position manually by pressing TEAR (5).
...Sec
5 Press SHIFT (2) + SEL (1) to exit Menu Mode and save the setting.
18 Microline 420/421 User's Guide
Manual Forms Tear Off
If you don't wish to engage the Forms Tear-Off...
Guide: User's, ML420/421 (English) - Page 44
Lock Lever Upper Tractor Cover Pins
Loading Rear Feed Paper from the Front of the printer. If you have ready access to "Loading Rear Feed Paper from the Back of the Printer
Note: These instructions assume you ...you do not, skip down to the back of the Printer."
1 Make sure the paper lever is forward (position marked "REAR").
2 Open the access cover (1).
44 Microline 420/421 User's Guide
Guide: User's, ML420/421 (English) - Page 50
...move the right tractor to lock it in illustration below) on the printer for the two most common paper sizes:
ML420:
ML421:
7 Open the tractor covers and ...tractor to the position to match your paper size and push back on the lever to fit the width of the paper.
50 Microline 420/421 User's Guide You must keep the number of paper holes engaged on either tractor, then close the left tractor...
Guide: User's, ML420/421 (English) - Page 51
8 Adjust the position of the right tractor to center the holes in the paper on the pins. Do not stretch the paper. Note: If the paper is too loose or too tight it can cause jams.
9 Reinstall the sheet guide. Maintenance 51 Then, close its tractor cover and push back the lock lever.
Guide: User's, ML420/421 (English) - Page 55
... Jams
1 Turn off before you lock the tractor covers.
5 Lower the sheet guide, then install the pull-up roller assembly (2). Make sure you open the access cover.
3 Open the access cover (1) and remove the pull-up roller assembly and close the access cover.
6 Turn on the printer and press FF/LOAD. Remove any torn pieces...
Guide: User's, ML420/421 (English) - Page 57
.... Then, load it on the tractors and close and lock the covers.
8 Load regular paper, close and lock the tractor covers.
9 Install the sheet guide, then install the pull-up roller assembly and close the access cover.
6 Use the platen knob to back the paper out.
10 Turn the printer on and press FF/LOAD. Maintenance...
Guide: User's, ML420/421 (English) - Page 68
Accessories
Option
Part Number
Model ML420
Pull Tractor, Top-Mount 70030501
Push Tractor, Bottom-Mount 70030701
Roll Paper Stand 70023301
Model ML421 Pull Tractor, Top-Mount 70030601 Push Tractor, Bottom-Mount 70030801
Both Models Cut Sheet Feeder 70030101
Serial Interface 70012801 OkiLAN® 6120i 10/100 Base-T Ethernet
Internal Print Server (not shown 70046501
OkiLAN 6020e ...
Guide: User's, ML420/421 (English) - Page 78
Appendix C: Specifications
Note: Specifications are subject to Repair (MTTR) 15 minutes
78 Print Method
Impact dot matrix
Printhead
9 pins, 0.30 mm (0.0118") diameter, with thermal protection
Interfaces
Standard: Centronics parallel, IEEE-1284 compliant USB 1.1
Optional: RS-232C Serial Ethernet Print Servers: 6120i ...
Guide: User's, ML420/421 (English) - Page 80
Requires optional push or pull tractor.
80 Microline 420/421 User's Guide Resolution (Dots per inch)
60 x 216 dpi 120 x 216 dpi 240 x 216 dpi
72 x 72 dpi 144 x ...UPC A, UPC E • EAN 8, EAN 13 • Interleaved 2 of 5 • Code 128 • Postnet
Paper Thickness: Tractor Feed
Rear Feed: 0.014" (0.36 mm) maximum Bottom Feed: 0.017" (0.44 mm) max. Graphics Resolution
Emulation IBM, Epson...
Guide: User's, ML420/421 (English) - Page 81
...)
Envelopes, single feed Feed: Top Only
Weight: Max. 24 lb. Index (180 g/m2) Width Range: Not applicable
* Bottom feed requires optional pull or push tractor
Specifications 81 Paper Specifications: ML420
Single (Cut) Sheets Feed: Top Only
Weight: 14 to 24 lb. US Bond (52.6 to 90 g/m2) Width Range: 7.2" to 8.5" (183 to 216...
Guide: User's, ML420/421 (English) - Page 82
...
Weight: Max. 100 lb. Width Range: 6.5" to 9.5" (165.1 to 24 lb. Index (180 g/m2) Width Range: Not applicable
* Bottom feed requires optional pull or push tractor 82 Microline 420/421 User's Guide Width Range: 3" to 16" (76.2 to 406.4 mm)
Interleaf continuous forms Feed: Rear, Bottom*
Weight: 10 to 241.3 mm)
Envelopes, continuous...
Guide: User's, ML420/421 (English) - Page 96
...Oki MICROLINE Standard Commands 75-77 Operator Panel Function 65 Options 66
P
Page Length Rear Feed 29 Top Feed 30
Page Width 39 Bottom Feed 29 Rear Feed 29 Setting in the Printer... 31, 40 Printer Control Codes 69-77 Printer Drivers, Selecting 92-93 Printer Parameters 25 Printhead 78
Gap 21 Proportional Spacing 28, 40 Pull Tractor 68 Push Tractor 68
R
Rear...420/421 User's Guide
Similar Questions
Ml420 Rear Tractor Feed Reverses Randomly
ML420 will randomly reverse and unload paper from rear tractor feed. works fine then it will just re...
ML420 will randomly reverse and unload paper from rear tractor feed. works fine then it will just re...
(Posted by WiliamGamble 9 years ago)
How Close To The Top Margin Can I Print With A Microline 421
(Posted by shesfatty 9 years ago)
How To Change The Rear Tractor Pull
how to take out the current rear tractor pull and replace it with a new one
how to take out the current rear tractor pull and replace it with a new one
(Posted by amcl 10 years ago)
Printing Is Sideways
Oki Data dot matrix printer being used with Okidata Okilan 6020E print server. The issue is no matt...
Oki Data dot matrix printer being used with Okidata Okilan 6020E print server. The issue is no matt...
(Posted by kscott17092 11 years ago)
How To Replace Rear Tractors?
How to replace rear tractors on oki 420?
How to replace rear tractors on oki 420?
(Posted by jas48080 12 years ago)