Voith Launches Real-Time Nip Monitoring System

In paper manufacturing, maintaining uniform nip conditions is critical for web stability and product quality. Traditional measurement tools typically require machine shutdowns and cannot analyze nip profiles while paper is running through the machine, providing only static snapshots. To eliminate this monitoring blind spot, Voith has launched NipDynamics, an advanced sensor system embedded directly into roll covers. This technology enables continuous, real-time monitoring of nip pressure and rotational frequencies at full production speeds and high temperatures, allowing plant operators to detect roll cover misalignment or damage before they cause web breaks or unscheduled downtime.

Wireless Data Transmission and 3D Visualization
The ultra-thin, heat-resistant sensors are integrated into the roll without compromising profile performance, functionality, or the lifespan of the roll cover. They wirelessly transmit continuous measurement data to a customizable 3D visualization platform. This digital infrastructure enables maintenance teams to analyze current operating states and evaluate historical data trends with precision. By transforming raw sensor data into a live 3D model, the system helps operators pinpoint process anomalies—such as local pressure drops—without halting the production line, ensuring a proactive approach to roll maintenance and process management.

Scalable Monitoring Across the Entire Production Process
The system is flexibly deployable from the forming section down to the reel. In active industrial deployments, the sensors have demonstrated substantial operational value. On a European MG cylinder, continuous nip optimization generated verifiable savings of €45,000, leading to the equipment of additional rolls. In a rewinding application, the system showed extreme sensitivity at line loads of just 2 kN/m, successfully isolating quality-relevant winding issues. Furthermore, on a tissue pressure roll, the system instantly identified a localized low-pressure zone correlated with a wet streak in the paper profile, allowing the hidden deviation to be corrected immediately. "NipDynamics gives paper manufacturers continuous insight into nip conditions during active production," explains Ralf Moser, Global Product Manager for Roll Covers at Voith Paper.

Additional Context: Dynamic Loads and Nip Mechanics
This section provides technological background not explicitly detailed in the original release. In the high-speed papermaking process, the "nip"—the contact area between two rotating rolls—is subjected to immense dynamic forces and thermal stresses. If the pressure profile is uneven, it directly impacts dewatering efficiency and the cross-machine moisture profile of the paper web, leading to structural weaknesses and web breaks. Traditional static nip impressions using pressure-sensitive paper during machine shutdowns cannot capture dynamic crown inversion, thermal expansion, or the hydrodynamic effects of pulp at operating speed. By embedding wireless telemetry directly into the elastomeric roll cover, engineering teams transition from reactive troubleshooting to condition-based monitoring, dynamically optimizing nip loads and maximizing the operational lifespan of the equipment.

Edited by industrial journalist Lekshman Ramdas, with AI assistance.

www.voith.com