Adjusting Printhead Pressure And Support - HP DMXTM 400/430 Operator's Manual

5.3.3 Fine Printhead Alignment
Print a few rotated bars and inspect the print quality. With a
1/16" (1.59 mm) hex key, turn the left and right head-
adjustment screws counter-clockwise approximately 1/4 1/2
turn until the desired print quality is achieved. Finally, turn the
left head-adjustment screw 1/4 turn counter-clockwise.
5.4

Adjusting Printhead Pressure and Support

The Head-Support Plate supports the outer end of the Printhead
when narrow media is used. Without this support, the Printhead
would bear down on the drive roller, causing diminished print
quality and premature wear. The Head-Support Plate needs to be
engaged only when the media width is less than 3.5" (89 mm).
The Printer's Printhead support requires adjustment if media widths
of 3.5" (89 mm) or less are used. To make this adjustment complete
the following steps:
1. Loosen the two mount screws that fasten the Head to the
2. Load the media and engage the Printhead by rotating the
3. Turn the adjustment screw clockwise until the Support
4. Tighten the two mount screws to secure the Support
Note: The mount screws that secure the Head-Support Plate
also secure the Ribbon Shield. When loosening these
screws, be aware that both the plate and the shield may
move.
DMX 400/430 Operator's Manual
Support Plate, leaving the screw only slightly snug.
Head-Lift Lever to the 'down' position.
Plate moves down and contact the Bearing Plate
underneath.
Plate.
Troubleshooting
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