System information

Function

Lever-arm type stretching systems monitor and control the fabric tension of wires. Externally mounted fabric tension sensors continuously measure the fabric tension. A digital three-point controller continuously compares the actual value with the set target value and sends a correction value to the actuating drive of the lever-arm type stretcher. The tension on the wire is increased or decreased via the lever-arm type stretcher.

Area of use

The lever-arm type stretching system is used in the area of the wire sections for wire tension.

Application

Lever-arm type stretching systems can be freely mounted in terms of position. The adjustment stroke should be dimensioned for a 1-2% change in length of the wire and the necessary length required for changing the wire. The fabric tension sensor should be installed in the running direction of the wire as close to the stretch roll as possible. Only one lever-arm type stretcher can be operated in automatic mode per wire. Additional lever-arm type stretchers are to be positioned "manually" for optimum wire tension.

ELSTRETCHER

Felt and wire tension system

Lever-arm type stretching system ELSTRETCHER SPA09

Lever-type stretcher system for use in the wire section of a paper machine

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System components

Fabric tension sensor PD 77

Fabric tension sensor with bearing bracket for external measurement on guide roller

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Fabric tension sensor PD 80

External fabric tension sensor on separate guide roller for pedestal bearing mounting

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Analog measuring amplifier CV 22

Single-channel measuring amplifier for connecting two fabric tension sensors to a strain gauge bridge

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Digital measuring amplifier with display PA 62

Digital two-channel measuring amplifier for connection of 2 fabric tension sensors with a strain gauge bridge

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Fabric tension controller DC 04

Extremely compact digital fabric tension controller with integrated digital inputs/outputs and three-point controller for actuation of a three-phase motor/solenoid valve for the pneumatic motor

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Command station DO 20

User interface with user-friendly plain text display

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