Tension Control Continued

or another equivalent bearing. After the measured value has been processed in the PID controller, the regulated brake pressure is applied to the brake via a U-P transducer.

Particular advantages are:

PID regulating function
Simple setting of the regulating behaviour, fine alignment by the P, I and D components possible.
Ability to adjust the parameters of the ramped increase in the brake torque at line start-up.
Automatic switch-over to holding pressure when the line stops,
External setting of command values possible. Enhancement possibilities: Automatic switching off of brake calipers during the unwinding process, automatic switching on of brake calipers in the case of rapid or emergency stops.

ORTLINGHAUS-CONTREX

A device for monitoring the tension in lines of material electronically, consisting of:

Electronic measuring device based on extension measuring strips
Measuring amplifier with digital display.

When used with the Ortlinghaus TENSIODYN-M web tension feedback control system, the measuring amplifier is located in the PID regulator. The mechanical subassembly contains the "pathless" sensor and two bearing points for a line guiding roller. The bearing housing can be fitted either as a pedestal bearing or as a flange bearing.

ORTLINGHAUS-TENSIODYN®T

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

PUD regulator with ultrasonic sensor
Operating console
Pneumatically actuated tension brake.

This system is recommended when it is important that the line tension is kept constant even during dynamic process such as when the line is started up or when its speed is changed. Operation: The changes in position of the jockey roller are measured with a potentiometer. The PID regulator adjusts the brake pressure via a U-P transducer. At equilibrium the jockey roller is in the preset middle position regardless of the command value that has been set for the line tension.

Particular advantages are:

PID regulating function
Fine alignment by the P,I and D components possible
Ultrasonic measurement of the roll diameter permitting automatic matching of the regulated valve in order to prevent the jockey roller oscillating
Ability to adjust the parameters of the ramped increasing of the brake torque at line start-up, - Automatic switch over to holding pressure when the line stops
Jockey roller position and regulator output displays.

Enhancement possibilities: Automatic switching on of brake calipers at rapid or emergency stops, switching over of the brake torque ranges.

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