Printhead Burn Line Adjustment - Datamax M-Class Mark II Maintenance Manual

2.4 Printhead Burn Line Adjustment

Print quality can change when using extremely thin or thick media. Typically, thick media
requires a forward adjustment, while thin media requires a backward adjustment. Perform
an adjustment as follows:
1. Load media (and ribbon, if required).
2. Loosen both Locking Screws approximately ¼ turn counterclockwise.
3. Turn the Adjustment Screws counterclockwise until the burn line is past the platen roller
vertex, then print a Test Label as follows:
Non-Display Models: Simultaneously press PAUSE and FEED.
•
Display-Equipped Models: Select a Print Quality Label.
•
4. The image should be light and uneven and then tighten (just until snug) the Locking
Screws – enough to remove the play in the printhead assembly, while allowing the
Adjustment Screws to move the printhead.
5. Turn each Adjustment Screw clockwise about a ¼ turn (or 1/8 turn for finer
adjustments, see note below). Print another Test Label and examine the print quality.
Repeat until the labels are produced with an even print contrast and an acceptable print
quality.
Note: When the Locking Screws are snug, turning the Adjustment Screws

counterclockwise will NOT move the printhead outward; if you have adjusted the
printhead too far inward, restart the entire procedure.
6. Tighten the Locking Screws then print a final Test Label to verify the adjustment.
Adjustments and Maintenance
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