Unit 6: Maintenance
GL408-412e Operator’s Manual
6-11
RIBBON ROLLER ALIGNMENT
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, print head, ribbon roller, or ribbon guide.
The purpose of the adjustable ribbon roller is to compensate for the axis deviations of the other three. By adjusting
the ribbon roller proportionally to the degree of deviation, the ribbon spreads smoothly as it travels from the ribbon
supply spindle, to the guide, and beyond.
Ribbon roller 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 roller is secured to the to the side of the upper print assembly and that’s where the roller adjustment
plate is located. Loosen its set screw, adjust the plate as perceived necessary, then retighten its set screw.
Figure 6-9, Ribbon Roller Alignment
ATTENTION: The ribbon roller should not require adjustment. Therefore, attempt to
correct ribbon wrinkling thorugh the other methods and adjust this as a last resort.
NOTE: To facilitate viewing of pertinent components, Figure 6-9 does not show ribbon
and media loaded. When performing this adjustment acitivity, both must be loaded.
NOTE: Refer to their relative procedures within this manual for guidance on Print
Head Balance , Print Head Pressure, and Ribbon Guide Alignment.
Roller Adjustment Plate
Set Screw
Upper Print Assy
