System for transporting media in printer

A system for transporting media in a printer is provided having a media roller rotatably mounted to the printer housing, a motor, a drive belt looped about the motor drive shaft and the roller so as to impart the motor rotational driving force to the roller, a tensioning member pivotally mounted to the housing for contacting and thereby tensioning the drive belt about the motor drive shaft and roller, a brace member mounted to the housing about a slotted arm of the tensioning member, and a locking screw fixed to the housing through the brace member and slotted arm. The pivoted position of the tensioning member relative determines the tension imparted on the drive belt. The locking screw locks the pivoted position and the brace member is fixedly mounted so that rotation of the locking screw is not imparted to the slotted arm during fixing of the locking screw.