Tension Control Continued

- Pneumatically actuated tension brake. This system holds the unwinding tension at a preselected constant level. Operation: The ultrasonic sensor senses the roll diameter. The control device processes the sensor's signal and outputs a signal to adjust the air pressure for the brake in accordance with the decreasing roll diameter and the preset command value for the line tension. The control device is offered in two different versions: - "TENSIONOR I" as standard version with the basic functions, namely setting of the command value, releasing of the brake and display components. - "TENSIONOR II" with additional functions including gradual ramp increase of the brake pressure, the gradient of the ramp being preset, digital displays for brake pressure, together with roll and residual diameter, warning signals when a roll has been fully unwound, automatic or manual mode.

ORTLINGHAUS-TENSIOBAR®

Fully pneumatic web tension feedback control system consisting of the following components:

Measuring device
Operating console
Pneumatically actuated tension brake.

Thanks to its robust design, this web tension feedback control system is suitable for difficult operating conditions including use in locations with an explosion hazard. Operation: The measuring device is also the bearing for a line guiding roller. The actual web tension, measured at the measuring device, is compared with the preset command value. Each variation found is compensated for by an appropriate adjustment being made to the operating pressure of the brake. Particular advantages are:

Simple operating
Almost no maintenance
Sensitive feedback
Repeatable control.

Possible enhancements: Emergency stop circuit, switching over to different brake torque and command value ranges, feedback control for flying roll changes.

ORTLINGHAUS-TENSIODYN®M

Electronic web tension feedback control for measuring roller systems consisting of the following components:

Ortlinghaus-CONTREX measuring device with electronic transducer
PID regulator with measuring amplifier,
Operating console
Pneumatically actuated tension brake.

This system is particularly suitable for unwinding lines where the requirements are ease of operation, repeatable, automation, large regulating range and optimum facilities for integration into the particular process. Operation: The effective tensile force is monitored with the CONTREX measuring device

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