Adjusting The Printhead Position - CAB XD4M/300 Service Manual

4 Adjustments
22
4.2.2

Adjusting the Printhead Position

In order to achieve the best possible print image the following printhead settings are necessary:
• Align the heating line with the highest point of the print roller. Density of the print image is the greatest at this
point.
• Set the parallelism of horizontal lines with the edge of the label.
Attention!
!
The printhead assembly can be damaged.
Attempting to adjust the printhead when the fixing screws (3) are tight can lead to defects at the printhead
assembly.
 Always loosen the fixing screws (3) before adjusting the printhead.
1
2a
3
1
2b
Fig.21 Adjusting the printhead position
Notice!
i
 Open and close the printhead lock after each step of the adjustment.
1. Check the alignment of the printhead in the adjustment windows (1).
2. If the printhead is not aligned properly, loosen the screw (3) about one quarter turn.
3. If the printhead is not aligned properly, use the screws (2) to align the lines on the printhead with the tips of the
grooves.
- For the upper printhead screw (2a) effects the inner half of the printhead, and screw (2b) the outer half.
For the lower printhead it is mirrored.
- Turning clockwise moves the printhead forward.
4. Create print samples with the test function Test grid ( Configuration Manual) or a similar print pattern.
5. If the horizontal lines in the test grid are not parallel with the label edges, adjust the parallelism with the screws
(2).
6. Set the best possible image quality by maintaining parallelism via turning the screws (2a) and (2b) in an alter-
nating fashion.
Differences in the density between the two sides are still permissible.
7. Tighten the screws (3).
8. When the parallelism of the printhead is set, continue with the adjustment of the printhead pressure  4.2.3 on
page 23.
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