Clarence Klassen posted a blog post
E-Stop-Yellow Submarine Original Artwork copyright 2012Emergency Stops have been required on machinery for a very long time. The current definition for E-Stop is provided in ISO 13850 – Safety of Machinery – Emergency Stop – Principles for Design an…
Sep 30
Clarence Klassen posted a blog post
The Pulse Width Modulation (PWM) drives can create motor overvoltage failures due to differential mode transient voltages. This is a well-known problem since AC VSD's were introduced. Specify motors insulated for Adjustable Speed Drive application.T…
Sep 24
Clarence Klassen posted a blog post
Mine Hoist-Yellow Submarine Original Artwork copyright 2012Web Handling is a small player (<10% of the market) for Variable Speed Drives. Most of our drives are used in fractional or low power applications. High-Power drives (0.4 to 200 MVA) are use…
Sep 16
Clarence Klassen posted a blog post
Diameter-Yellow Submarine Original Artwork copyright 2012Of all the features of a drive system, the most popular by far is stop to diameter. A few weeks ago I wrote about stopping to length. Stopping to diameter is a bit more complicated than stoppi…
Sep 9
Clarence Klassen posted a blog post
Noise-Yellow Submarine Original Artwork copyright 2012Electrical noise is anything that degrades a measurement in the electrical control system. Noise can be of any frequency. Sources of noise may be the power supply, improper grounding, improper sh…
Sep 4
Clarence Klassen posted a blog post
Easy as Pie - Yellow Submarine Original Artwork copyright 2012Several times this year I have heard people speaking of the advantages of simple drives. Who wouldn’t be in favor of a simple drive?By simple, OEM managers expect a low-cost drive that do…
Aug 26
Clarence Klassen posted a blog post
Yellow Submarine Original Artwork copyright 2014This list provides a yearly update of standards applicable to web handling. Revisions this year are shown in bold-italics.Risk AssessmentANSI B11.0-2015 Safety of Machinery; General Requirements and Ri…
Aug 19
Clarence Klassen posted a blog post
 https://www.stevenabbott.co.uk/abbottapps/WBC/index.htmlThis week we present something entirely new. A Web-Based PID simulation Web Based Controller (WBC) app. The calculations were programmed and the page published by Prof. Steven Abbott, a long-t…
Aug 13
Clarence Klassen posted a blog post
Yellow Submarine Original Artwork copyright 2012Of all the features of a drive system, the most popular by far is stop to length. This feature is particularly appreciated by operators of older lines in which the operator had to be vigilant to preven…
Jul 31
Clarence Klassen posted a blog post
Yellow Submarine Original Artwork copyright 2012Years ago, I was plagued with web breaks on a large high-speed paper coater. In the motor control room, we had a full time, 8 channel chart recorder. It was set to chart at slow speed continuously at a…
Jul 22
Clarence Klassen posted a blog post
Yellow Submarine Original Artwork copyright 2012The TNT’s associated with the quality of winding are Tension, Nip Loading, and Torque2. Torque2 is the second T and is used when control of Tension and Nip Loading is not enough to produce a roll witho…
Jul 16
Clarence Klassen liked David R Roisum's blog post Summer School - Roller Alignment How Close
Jul 16
Clarence Klassen posted a blog post
Yellow Submarine Original Artwork copyright 2012Producing rolls of a fixed length is a great selling point and may even be a requirement. Web length measurement is normally accomplished with a length or footage counter. This is a wheel of known circ…
Jul 8
Clarence Klassen posted a blog post
Yellow Submarine Original Artwork copyright 2012It is quite difficult to maintain some older electronic devices used in web handling. Many of these devices used serial RS232 communications protocols. They may also use DOS or old Windows programs. I…
Jul 2
Clarence Klassen posted a blog post
Yellow Submarine Original Artwork copyright 2012The controllers used in web handling have a lot of data, but not much storage capacity. Many manufacturers recognize this and collect and retain the data from the drive controller using programs typica…
Jun 24
Clarence Klassen posted a blog post
Yellow Submarine Original Artwork copyright 2012Pneumatic accumulators are designed to take up slack and maintain web tension if a drive stops. The need may come up during splices, cut-overs or due to equipment jams. Because the accumulator is part…
Jun 17
More…