Roll to Roll means the control technology for continuous roll-to-roll processing of a web (sheet of a paper, film, or other material) from the unwinding roll to the winding roll. The FR-A800-R2R inverter with built-in dedicated functions like automatic winding diameter calculation, automatic dancer speed control, and sensor-less torque control for perfect tension feedback all of which deliver stable and precise control in roll-to-roll applications. The FR-A800-R2R inverter is the perfect choice in a wide variety of systems with various dedicated wind/unwind functions.