Controller measurement accuracy. Actual web tension depends on sensor calibration, mechanics and control tuning.
View KTC828A specificationsClosed-Loop Tension Control
Stable Tension for Unwind, Process and Rewind Sections
Improve winding quality, reduce wrinkles and support repeatable roll-to-roll processing with KRD tension controllers and load-cell feedback.
Real-time tension feedback for closed-loop control.
Support for unwind, infeed, process and rewind zones.
Match the controller, sensor and output to your machine and control mode.
Installation photos + video
In Customer Equipment
From the roller path to the control cabinet
White web passes through a multi-roller section beside a cabinet-mounted KRD automatic tension controller. Explore the web route, cabinet position and local operating interface.
Choose the Control Mode
KTC828A or KTC838A: start with the feedback you have
Choose around the available sensor signals and winding requirements, then confirm the output interface.
Sensor-feedback closed loop
KTC828A
Use tension-sensor feedback to compare measured tension with the setpoint and adjust the output. Review this option when the machine has, or can accept, tension sensors.
Confirm single/dual sensor inputs, excitation, wiring and the brake, clutch or drive interface.
Explore KTC828AClosed loop + calculated open loop
KTC838A
Supports sensor-feedback closed-loop control, plus calculation-based open-loop control using proximity-switch or encoder input. Adds roll-diameter calculation and taper tension functions for winding requirements.
Confirm the pulse signal, diameter-calculation method, taper requirements and output interface.
Explore KTC838ANot sure which mode fits? Share what you know about the machine and material. Incomplete technical details are welcome.
Common Tension Problems
Designed to stabilize changing roll diameter and line speed
Tension variation can create web breaks, wrinkles, telescoping rolls, poor slit quality and inconsistent winding hardness.
Wrinkle and Web Break Reduction
Keep web tension within target range during acceleration, deceleration and diameter changes.
Better Rewind Quality
Support consistent roll hardness and cleaner finished roll geometry.
Repeatable Production
Improve repeatability across operators, materials and production batches.
Product Fit
Core tension control products
KTC828A
Automatic tension controller using sensor feedback for closed-loop control.
KTC838A
Sensor closed-loop and calculated open-loop control, with roll-diameter and taper functions.
LB60
Load-cell and sensor family for real-time tension feedback.
Brakes & Clutches
Magnetic powder brake and clutch products for tension actuation.
Selection Inputs
Send the right data for faster quoting
For a tension control inquiry, include material type, web width, line speed, tension range, roll diameter and machine section.
Material, web width and maximum line speed.
Target tension range and control section.
Existing brake, clutch, motor or sensor configuration.
Engineering Support
Contact KRD Automation for a customized tension control solution
Our team can help match controller, sensor and actuator components for your machine.