A high-speed double-drum winder looks simple from the outside, but the drive has to get three things right at once. First, the unwind roll runs automatic tension control so the web enters the winder at a steady tension regardless of how full the parent roll is. Second, the rider roll regulates nip pressure against the building roll, setting how hard the paper winds without crushing the core.
Third, reversible control lets the same drive both wind and run controlled reversal — used during thread-up and troubleshooting, when the line has to back off and re-thread without a manual overhaul. Combined with length and diameter counting and a controlled deceleration stop, the line reaches finished-roll diameter and stops cleanly.
These three functions, plus constant-tension control across the roll buildup, are exactly what our winder drive package performs on a 5600 mm, 1500 m/min winder — engineered, integrated and commissioned by our own team.