always use ribbon that is wider than the media. the smooth liner of the ribbon protects the printhead from wear. (for direct thermal printing, do not load ribbon in the printer.)
refer to figure 22.
1. press the printhead open lever. the printhead assembly springs up.
2. orient the ribbon as shown. push the ribbon roll completely onto the ribbon supply spindle.
3. pull the end of the ribbon over the ribbon sensor, under the printhead assembly, and out the front of the printer.
4. hold the ribbon snug and free of wrinkles and in line with the guide mark near the left edge of the ribbon guide plate. close the printhead assembly.
5. wind the ribbon clockwise onto the ribbon take-up spindle.