The Redex DGT300+ is a fully digital web tension controller from the MEROBEL product line, designed for unwind, rewind, and intermediate tension zone applications in web handling machinery. It accepts direct input from load cells, dancer potentiometers, diameter sensors, and tachometers, and outputs a configurable ±10 V or 0-10 V drive signal along with a built-in 1.5 A power supply for direct brake or clutch actuation — eliminating the need for a separate amplifier module.

How does the dual-mode control work?

The DGT300+ operates in both closed-loop mode using load cell feedback for precise tension measurement and open-loop mode using dancer position or diameter-based calculation. The PID regulation algorithm automatically varies its proportional, integral, and derivative parameters based on operating conditions, and an inertia compensation function corrects for roll diameter changes during acceleration and deceleration. Operators can set independent output limits and power gain (0-100%) for each mode, and the controller blends open-loop and closed-loop coefficients for smooth transitions.

How are application setups managed?

Five complete built-in memories store independent application presets including PID parameters, tension setpoints, taper tension profiles, soft start ramp slopes, and time delay settings. This allows a single controller to be quickly reconfigured when the production line switches between different web materials or roll formats. The USB port connects to a Windows PC running the free configuration software for full setup, monitoring, and data capture — including real-time tension trending and parameter tuning.

What advanced web handling functions are included?

The controller provides adjustable taper tension for consistent roll build quality as diameter changes, a soft start function with programmable ramp slope to prevent web breaks during startup, and no-stop splice turret management for continuous unwinding. The hold and release function maintains tension during momentary stops, while the E-Stop response applies torque proportional to the setpoint for controlled emergency deceleration.