Abstract: An improved back tensioning system for a roll fed printer is provided. A spring loaded arm keeps a roller in direct contact with the outer diameter of the unwind roll. The roller is coupled to a slip clutch that exerts a constant force against the roll of media. Since this system does not apply a torque about the axis of rotation, as was the case in the prior art, the back tension does not vary with unwind roll size. As a result, linear back tension is provided in a manner that critically improves web handling and the printing process. As a result the problem is eliminated by applying resistance directly to the outer diameter of the roll of media.