
Troubleshooting
66
DMX 400/430 Operator’s Manual
5.2.3 Mechanical Adjustments
The Printhead is precisely positioned on mount plate locating
pins that are adjusted at the factory. Once adjusted, the locating
pins will ensure correct alignment of all future replacement
heads. It should not be necessary to realign each new Printhead;
however, an alignment procedure is required if the Printhead
Mount Assembly has been removed or disassembled.
The horizontal placement of the Printhead is adjusted by turning
the right and left head-adjustment screws that correspond to the
right and left sides of the Printhead. Turning the screws 1/2 turn
counter-clockwise will move the Printhead 0.012" (0.305 mm)
forward. Likewise, a 1/2 turn clockwise will move the Printhead
back 0.012" (0.305 mm). Therefore, only a small adjustment of
even a 1/4 turn will cause a big difference in print quality.
Caution
Do not turn the head-adjustment screws more
than 2 complete turns in either direction.
Damage to the Head Mount Assembly will
result if the adjustment screws are turned too
far.
The alignment procedure and the sequence that should be followed
is described in section 5.3. This procedure should correct poor print
quality; however, all adjustments must be performed with label
stock that is at least 4" (102 mm) wide. If the final media used is
different, then make the specific adjustments necessary after the
standard adjustments are completed.
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