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Web Lines

WHQuiz Answer #1 - The Right Tension

Published: February 21, 2012

WebHandlersQuiz1: Tension Control - How do you determine the target web handling tension for a give product in units of force or force per width? Answer...

Tim's Web Lines Blog Starts NOW

Published: February 21, 2012

This month marks the 10th anniversary of Web Lines column by T.J. Walker. Beginning our second decade, we are moving beyond the monthly column to share web handling process knowledge via this blog. 

Web Lines | Test Your Web Handling Knowledge

Published: February 15, 2012, By Timothy J. Walker

Can you pass this 20-question quiz to prove you understand basic principles of web handling?

Web Lines | Blocking in Rolls

Published: January 13, 2012

Get out of the hockey puck business…

Web Lines | A Rant from Tim Walker

Published: December 05, 2011

 Why don’t equipment suppliers include a display of the process variable that is critical to running successfully?

Web Lines: Take the Laminator Quiz

Published: October 17, 2011, By By Timothy J. Walker, Contributing Editor

How does your laminator rate compared to the ideal design?

Plotting Shear Wrinkles

Published: August 22, 2011, By By Timothy J. Walker, Contributing Editor
The combined conditions of when roller misalignment is bad enough to wrinkle a web is a complicated mechanism. You have to combine concepts of roller misalignment, web buckling, and web-to-roller traction

Web Lines: Wrinkling of Foils

Published: August 01, 2011, By By Timothy J. Walker Contributing Editor

In our everyday lives, our main experience with foil likely comes from wrapping a potato in kitchen-grade aluminum foil. Wrinkling thin aluminum foil

Web Lines: Is Wound Roll Pressure Greater Than Tire Pressure?

Published: July 01, 2011, By By Timothy J. Walker Contributing Editor

I'll bet you that your wound roll has more internal pressure than a car tire. To win this bet, I have to prove that internal roll pressure is above 30

Web Lines: Displacement vs Steering | Battle of the Web Guides

Published: June 01, 2011, By By Timothy J. Walker Contributing Editor

Tim Walker Addresses Displacement Guides, Known as Offset Pivot Guides, and Steering Guides that Have Differing Uses for Providing Intermediate Corrections of Laterial Web Position

Do You Want Nips with That? Part 2

Published: May 01, 2011, By By Timothy J. Walker Contributing Editor
No nips, please. To qualify this statement, I just want to get rid of unnecessary nips, especially for preventing slip on tension controlling drive rollers.

Web Lines: Would You Like Nips with That?

Published: April 01, 2011, By By Timothy J. WalkerContributing Editor
No nips, please. I need a button that says this. Every day, dumpsters and truckloads around the converting world are filled with waste generated due to

Web Lines: Limitations of Vacuum Pull Rollers

Published: March 01, 2011, By By Timothy J. Walker Contributing Editor
I love vacuum pull rollers (VPRs). When it comes to driving a web without slipping and scratching or to knowing you have control of the tension differential

Web Lines: Don't Flip Out - It's Just a Web Flip

Published: February 01, 2011, By By Timothy J. Walker Contributing Editor
The first time you see a web flip, you will wonder if you are looking at an M.C. Escher drawing. Escher was famous for his castles where you could walk

Web Lines: Blow Away Your Roller

Published: January 01, 2011, By By Timothy J. Walker Contributing Editor
What can reverse the direction of your web without touching it? What can redirect a web's running angle or inclination with the tension losses of roller

Reflections on Deflection

Published: December 01, 2010, By By Timothy J. Walker Contributing Editor
After reading last month's column, you should have resolved all of your deflecting roller problems. However, the alert web handler is not done with deflection

Web Lines: Q&A on Roller Deflection

Published: November 01, 2010, By By Timothy J. Walker Contributing Editor
Here are five frequently asked questions about roller deflection with my responses. Next month, we'll talk more about deflection, but instead of rollers,

Web Lines: Web Length per Roller Revolution=?

Published: October 01, 2010, By By Timothy J. Walker Contributing Editor

When a roller rotates, how much web does it feed forward per revolution? At first, the answer seems obvious: It feeds forward a length of web equal to

Web Lines: Mission-Detect Nip Variations

Published: September 01, 2010, By By Timothy J. Walker Contributing Editor

How To Detect Nip Variations To Create a Uniform Web Product

Web Lines: How To Control Roller Nips

Published: August 01, 2010, By By Timothy J. Walker Contributing Editor
If you want to compress something, you always have two choices. You can use either one of the following options: Put it in a vise or C-clamp and slowly

Web Lines: Are You Getting the Shaft?

Published: July 01, 2010, By By Timothy J. Walker Contributing Editor
Getting the shaft may sound bad in street lingo, but in winding there are good and bad aspects of whether you want to get the shaft (wind with a shaft

Web Lines: Do You Need an Auto Web Guide?

Published: June 01, 2010, By By Timothy J. Walker Contributing Editor
Does every web process need an automatic web guide? Maybe two? If I was in sales for a web guide supplier, I would say, Of course! and How about three?

Force Is Needed to Shift a Web

Published: May 01, 2010, By By Timothy J. Walker Contributing Editor
When your web isn't where you want it to be, you have two choices: You can be happy where it is, or you can try to move it to where you want it. If you

Web Guiding | Lateral Motion Causes

Published: April 01, 2010, By By Timothy J. Walker Contributing Editor
Where is your web? In the machine direction, hopefully, it is continuously running between your upstream and downstream processes. But where is it laterally?

Web Lines: Your Guide to Web Guiding | Part 1

Published: March 01, 2010, By By Timothy J. Walker Contributing Editor
Web guiding done right is easy to forget. The principles of web guiding are well understood. With good decisions in the design phase of a process and

Web Lines: Pitch & Catch Guiding

Published: February 01, 2010, By By Timothy J. Walker Contributing Editor

If you are like me, you find yourself thinking about spring as a way to cope with long winter days. For many, spring means baseball. A good way to combine

Web Lines: What Is a Tension Zone & How Many Are Needed?

Published: January 01, 2010, By By Timothy J. Walker Contributing Editor

Tension and speed control are the two most fundamental purposes of any web handling system. Speed control is easy for most people to understand, since

What Is the Right Tension?

Published: December 01, 2009, By By Timothy J. Walker Contributing Editor
Of all the questions about web handling, the most-asked question has to be: What is the right web handling tension for my product? This is a great question

Cores | The Foundation of Winding

Published: November 01, 2009, By By Timothy J. Walker Contributing Editor
Where would you prefer to build your next house on swamp land or solid bedrock? This should be an easy question since it's clear a house starts with the

A Torque Devil Is in the Details

Published: October 01, 2009
In center winders, like the classic Rolling Stones song, you can't always get what you want. Imagine you need to buy a new center-driven winder or unwinder.

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