Adjusting The Print Mechanism - CAB MACH4 Service Manual

 Adjustments
.

Adjusting the Print Mechanism

Major adjustment of the print mechanism beyond format-based settings is only required if the printhead assembly has
been removed or parts in this area have been replaced. Excluded from this is the replacement of the printhead, after
which readjustment is generally not required.
The following print quality imperfections may require a correction of the print mechanism adjustment:
- Print image too light
- Print image is spotty
- Print image lighter on one side
- Horizontal lines not parallel to the horizontal label edges
- Clear lateral drift of the transfer ribbon
Notice!
i
Print image errors can also arise from wrinkling of the transfer ribbon. Check the transfer ribbon feed path.
..1 Adjusting Elements
Fig. 15 Printhead adjusting elements
1 Printhead
2 Screws for horizontal alignment
Screws for horizontal alignment ()
- Turning the screws clockwise will move the printhead to the front.
- Turning the screws counter-clockwise will move the printhead to the back.
For an optimum print quality, the heating elements of the printhead must be aligned to the peak of the print roller. This
setting guarantees the best print darkness and the parallelism of printed horizontal lines and the label edge.
Screws for adjusting the printhead pressure ()
- Turning the screws clockwise will decrease the printhead pressure on the corresponding side.
- Turning the screws counter-clockwise will increase the printhead pressure.
By turning a screw (3) counter-clockwise and thereby increasing the printhead pressure, the print image will darken at
the corresponding side and the transfer ribbon feed will shift to the other side.
Warning!
!
Be careful while turning the screws () counter-clockwise, there is the possibility to screw off the parts
completely.
3 Screws for adjusting the printhead pressure
4 Screw for adjusting the printhead bend
1