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You have web Wrinkle Removal . . . we've got answers!

CAC product line

Air shafts and chucks

Air Shafts & Chucks


WrinkleSTOP Anti-Wrinkle spreader roll

WrinkleSTOP® Anti-Wrinkle

FOX Trim Removal Systems

Pneumatic Trim Removal

Aluminum Core Cones

Aluminum Core Cones

Adjusta-Pull Anti-Wrinkle

Adjusta-Pull® Anti-Wrinkle

Pneumatic Matrix Removal

Pneumatic Matrix Removal

Mechanical chucks and shafts

Mechanical Chucks & Shafts

Bowed Roll

Bowed Roll

Trim-AX Chopper

Trim-AX™ Chopper

Safety Chucks

ShaftLok™ Safety Chucks

Scroll Roll

Scroll Roll

Shaft Holders

Shaft Holders

Idler Rolls

Idler Rolls

Rollers and Roller assemblies

Roller Assemblies

Roller Mounting Blocks

Roller Mounting Blocks

Air loaded dancer roll assemblies

Dancer Roll Assemblies

Nip Roll

Nip Roll Assemblies

Unwind/rewind stand

Unwind / Rewind stand



Idler Rolls


Vettical Accumulators


Roll Lifting

Roll Lifting

Electrically Heated Rolls

Heated Rolls

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Featured Tech tip: How do you control tension?


Tech tip: How do you control tension?

How do you control tension off your unwind? How do you control tension at your rewind? Unwind and rewind rolls constantly change diameter and require constant adjustment of torque to maintain proper web tension. Remember the simple equation - torque = tension X roll radius, which mean tension = torque divided by roll radius.

If the roll radius is constantly changing (getting smaller off the unwind and getting larger at the rewind) we must change torque, linearly to maintain constant tension. Constant tension is always desirable off an unwind station and may be desired at the rewind (the rewind may need taper tension - but that's another discussion).

So, let's go back to my original question - how do your machine operators (or you if you are the machine operator) control tension in your operation? Are manual adjustments made to torque as roll diameters change? If you are adjusting torque manually a good option for you may be to add a simple open loop tension control, like an ultrasound control. Ultrasound controls measure roll radius and automatically make adjustments to torque to maintain linear tension control.

Ultrasound controls are relatively inexpensive and easy to install. Improvements made to your process, eliminating the need to manually adjust a brake or drive, will prove very fast return on investment.

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Converter Accessory Corporation
201 Alpha Road
P.O. Box 188
Wind Gap PA 18091-0188

Phone (800) 433-2413 or (610) 863-6008
Fax (800) 709-1007 or (610) 863-7818



What is Web Handling?
Web Handling is the science, engineering and equipment necessary to successfully transport a continuous flexible material through various processes without defect. Enhancing Web Handling with proper equipment will ensure materials are processed at their maximum efficiency, allowing the process to generate maximum profits.

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