Ejematic offers various web tension control solutions for unwinder modules to address the needs of different processes in the packaging industry. For unwinding processes where precise web tension is required, Ejematic offers various tension control solutions with electromagnetic brakes and different sensor options: • Manual tension control with an electromagnetic brake and potentiometer. • Automatic tension control with an electromagnetic brake and a parent roll equipped with an ultrasonic distance sensor to measure roll diameter. • Automatic tension control with an electromagnetic brake and...

• POS1: Pneumatic expanding shaft for roll holding. • POS2: Safety chuck or standard flange bushing. • POS4: Electromagnetic brake from 6 Nm to 100 Nm for tension control in unwinding

• Pneumatic expanding shaft for unwinding • Electromagnetic brake. Control for unwinding processes where band tension does not require high precision and allows for constant braking torque regulation, for example, in the case of small rolls with a diameter of less than 300 mm. This control provides a linear braking torque response based on the position selected on the potentiometer.

Band tension is controlled by a distance sensor that reads the mother roll's diameter and adjusts the braking torque accordingly. This control offers a linear response based on the diameter reading and allows constructing the braking torque response curve. It allows limiting the maximum and minimum diameter distances and assigning the corresponding braking torque for each distance. As an alternative to the distance sensor, a pendulum-type probe can be installed to read the roll diameter. • Pneumatic shaft for unwinding. • Electromagnetic brake. • Distance sensor or alternatively, pendulum-type...

Closed-loop control: an optimal band tension is selected, and dynamic fluctuations during unwinding modify the dancer's position. The automatic tension control corrects in real time the deviation between the read position and the reference position, maintaining the desired tension at all times. To read the dancer's position, different sensors can be used: potentiometer, distance sensor, tilt sensor, or encoder. • Pneumatic shaft for unwinding. • Linear or angular dancer. • Electromagnetic brake. Dancer position reading sensor.

Kit components: • POS1: Power supply electronics • POS3: Brake torque regulation sensor Polonllomeler Sensor (broke/clutch (broke/clutch regulation) regulation) OHO Sv MAMX lOOHO IOv Mntot Adjustable PWM frequency drive XT-074 (lectromognellc brake/clutch Tension control wiring diagram

POST: Spacer washer POS2: Shaft POS3: DIN 7991 Arm screw POS4: Anti-rotation arm POS5: Shaft key POS6: Electromagnetic brake POS7: DIN 912 M8x30 screw

General components kit diagram POS2: Mechanical brake from 2 Nm to 12 Nm for band tension control POS3: Safety chuck or standard bearing POS4: Frame POS5: Shaft journal of the pneumatic shaft POS6: Body of the pneumatic shaft

Mechanical brake Manual brake power regulation via nut Shaft journal . ✓Shaft journal required to assemble the mechanical brake Torque