PAPER

Paper machine applications require the DC Drive to electronically synchronise axes across the machine so that line speed & tension can be varied or kept constant as required. Because reel diameters are constantly changing, the DC Drive has to control the motor under separate speed-torque conditions to ensure constant speed & paper quality. Sprint Electric Digital DC Drives can control multiple-axes using deterministic position control to provide exceptional machine performance for paper applications. Naturally regenerative, our Digital DC Drives provide energy-efficient solutions.

When the paper has been wound onto reels from the paper machine, it must be cut into sizes that suit the downstream printing process.
Re-sizing is carried out on a slitter re-winder. Paper is fed from the unwind stand, through a set of slitter knives, then driven back to a re-wind system. This process requires separate speed control and torque control to ensure consistency of paper wrap during the wind-up process. Sprint Electric Digital DC Drives provide exceptional-bandwidth for high inertia loads as well as full regenerative capabilities providing energy efficient quick stop capabilities.