RRS – Rider Roll System

Our Rider Roll System precisely controls linear NIP force on winders and slitters by measuring the direct force and direct position of both rider roll cylinders. High-accuracy web tension load cells provide exact force measurements to the microPOS servo hydraulic position controller. Cylinder position sensor feedback closes the loop, enabling the rider roll to maintain optimal force and speed as paper feeds into the winder or slitter. The RRS solves the inherent deficiency of inferential-type hydraulic control systems which typically degrade as machinery ages, thereby introducing extraneous friction and vibration forces. If not accounted for, these forces cause roll kick-outs and/or inferior-quality rolls.

The first two-channel Rider Roll System was installed in 1974. Currently we deploy the fourth generation system.

• Prevent roll kick-out with integral vibration detection.
• Quick return of investment (ROI) – elimination of a single kick-out pays for the RRS System and more.
• Eliminate roll defects with precise, repeatable NIP force control on every run, with any kind of paper.
• Known force curves for different qualities of paper can be easily selected and uploaded. Uploaded application data controls NIP force, operating speed, and “soft” contact between the core and paper roll during splicing.
• During the reeling phase, linear NIP force is maintained as the diameter increases to ensure perfect density on the finished roll.
• Operators can enter or alter control parameters dynamically at the instrument front panel, or remotely from a PC or PLC.