Following is thought as the cause of interruption of the ribbon.

1. Too high a printing density.
2. Too high back feed speed.

Review and revise above setting points.
Setting methods are listed below.

<Use a printer driver>
Decrease the setting value of "Head Temperature" or "Rewinding".
Refer to the driver guide for more detail.

<Controlled by command>
- Decrease nn parameter value with the printing density setting command (Hnn).
  Refer to the command reference for more detail.

- Decrease a parameter value with the back feed speed setting command (pa).
  Refer to the command reference for more detail.