2015 Designer's Notebook - 17

Tension Controls

VERSATEC® Ultrasonic Tension Control Applications
Control Magnetic Particle Clutches and Brakes

Control Air Brakes and Clutches, or AC and DC Drives

The VERSATEC is a fully automatic ultrasonic tension control
for unwind and rewind applications. It offers simple setup
and operation at the touch of a finger, and conveniently
displays operating and setup information on a multi-line
alphanumeric backlit display.
By simply entering the core diameter, the full roll diameter,
the distance to the roll centerline, and the desired tension
from the front keypad, the VERSATEC is ready to use. It then
measures the roll diameter, and commands the required
torque to control tension. Tension adjustments and setup
selections may be made from the keypad, from remotely
mounted push buttons, or through a PLC.
In unwind applications the Stop Multiplier feature can be
used to increase torque during machine stops to provide
smooth stops and prevent slack webs. In rewind
applications Taper Tension prevents telescoping rolls and
insures good roll edges by reducing tension as the roll
diameter increases. Core and Full Roll alarms can be
adjusted to give the operator a signal before reaching the
end of the roll. This signal appears on the display and can
also be connected to an external indicator.
The Inverse Diameter Output is provided to reduce the
speed of the rewind clutch input motor or the differential
shaft overspeed as the roll diameter increases, thus
reducing the slip rpm and extending the life of the clutch
or the differential shaft.

Features
Fully automatic unwind or rewind tension control
improves process quality
Multi-line alphanumeric display simplifies setup
and operation
Simultaneously displays tension setpoint and roll
diameter so operator can monitor progress
Ultrasonic non-contact sensor never touches the web
Control electric or pneumatic brakes and clutches,
or AC and DC drives
Inverse Diameter Output reduces clutch slip for
longer life
Adjustable Taper Tension for winding
optimum rolls
Inertia Compensation for stopping large rolls
Core and Full Roll Alarms alert operator for roll changes
Local or remote tension adjustment and setup selection

Tension Controls

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Table of Contents for the Digital Edition of 2015 Designer's Notebook

Table of Contents
2015 Designer's Notebook - Cover1
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