Datamax-O'Neil H-Class Operator’s Manual - Manual (Page 39)

H-Class 29
3.4 Quick Calibration
Quick Calibration fine-tunes the printer for your media and should be performed during
initial setup or after switching media. With media installed and the sensor position adjusted,
perform calibration as follows:
With the printer idle, press and hold the FEED Key until one complete label advances
and then release the key.
Upon successful completion, CALIBRATION COMPLETED will be displayed followed by
READY.

• If the printer displays CANNOT CALIBRATE or stops feeding mid-label,
press and hold the FEED Key until two (or more) labels are advanced
before releasing the key. If this method also fails, see Media Sensor
Calibration (Section 5.2).
•
WARNING LOW BACKING may appear if using notched media, or media
with a transparent liner; however, calibration was successful.
• Media containing large gaps may require a change in the PAPER EMPTY
DISTANCE; see Section 4.2.1.
3.5 Print Quality Controls
The printer provides flexible print controls. Of these, the amount of heat applied and the
rate of media movement will have the most effect on the printed output. Four settings are
available via PRINT CONTROL (see Section 4.2.2):
• HEAT sets the printing energy level, where lower amounts lighten the image and
higher amounts darken it;
•
PRINT SPEED adjusts throughput, where slow speeds allow more time for energy
transfer and fast speeds may require more HEAT to achieve the desired contrast;
• CONTRAST fine-tunes the gray (shaded) areas of the image; and,
• DARKNESS fine-tunes the black areas of the image.

Heat and Speed commands from the host software may override the printer’s menu
setting; see HOST SETTINGS, Section 4.2.5.