Oki GL408e GL408e/GL412e User's Guide - Page 148

Unit 6: Maintenance 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. 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. 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. 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. Upper Print Assy Roller Adjustment Plate Set Screw GL408-412e Operator Manual Figure 6-9, Ribbon Roller Alignment 6-11 PN: 9001163A