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Unit 6: Maintenance
Lt408 Operator Manual
6-8 PN: 9001152A
RIBBON GUIDE ADJUSTMENT
If the print ribbon is not spread smoothly over the print head when it makes contact with the media, print voids will
occur at the point of the ribbon fold. Typically, this is the result of the axis of one of the following not being perfectly
parallel: ribbon spindle, ribbon roller, print head, or ribbon guide.
The purpose of the adjustable ribbon guide is to compensate for the axis deviations of the other three. By adjusting
the ribbon guide proportionally to the degree of deviation, the ribbon spreads smoothly as it travels from the ribbon
supply spindle, to the guide, and beyond.
Ribbon guide adjustment is a trial and error activity that requires the pause of printing, unlatching of the print head,
adjusting the guide, relatching the print head, and printing once again. Several labels must be printed following
each adjustment to determine if the adjustment was effective.
The ribbon guide is secured to the face of the print assembly by a screw on each end. Before adjusting the guide,
visually inspect that its axis is parallel with that of the print assembly. If not, adjust accordingly, ensure the set
screws are secure, and once again commence printing.
By starting in a neutral position, either end may be adjusted vertically as necessary to remedy the wrinkling
problem.
Figure 6-7, Ribbon Guide Adjustment
Set Screw
Print Assembly
Alignment Plate
Set Screw