Controlling Print Quality - Printronix T5000 User Manual

Chapter 5
Troubleshooting Common Situations

Controlling Print Quality

Three factors have the greatest effect on print quality:
•
The amount of heat applied by the printhead (print intensity)
•
The speed at which media is moving under the printhead (print speed)
•
The amount of printhead pressure.
For example, low-cost direct thermal media often have very high reaction
temperatures, which means that it takes a great deal of heat to make a clear
image. Resin ribbons and film media may require higher print intensity for a
quality image.
The printer provides two ways to increase the heat:
•
Running the printer slower by changing the print speed via the host or the
MEDIA CONTROL menu.
•
Setting the print intensity to a higher value with the Print Intensity function,
accessed via the host or through the MEDIA CONTROL menu. This
causes more heat to be transferred into the media, thereby generating a
darker image.
Proper printhead pressure adjustment will affect print quality. To adjust
pressure, rotate the printhead pressure adjustment dial (see Figure 8). For
more information, refer to "Printhead Pressure Adjustment" on page 59.
Also, the printhead should be cleaned frequently to ensure that foreign
material does not accumulate on the printhead and interfere with heat
transfer. If smears, voids or white lines appear in the printed form, the
printhead should be cleaned with a printhead cleaning pen (see Figure 8).
The cleaning should be done as a matter of routine whenever you install a
new ribbon (thermal transfer mode) or when you install new media (direct
thermal mode).
Pivoting Deck
244
Printhead
Elements
Figure 8. Cleaning the Printhead
Printhead
Pressure
Adjustment
Dial
Deck Lock Lever