Clarence Klassen posted a blog post
Yellow Submarine Original Artwork copyright 2012When I started my career in drive control and automation, I tried hard to do the most with the least processor power and the least memory. I learned which data types used the least memory and executed…
Monday
Clarence Klassen posted a blog post
Yellow Submarine Original Artwork copyright 2012Often the Torque Hold function provides adequate tension during most of the index, but may not provide enough tension for a good clean cut. The knife may require a very taut web if the web is stretchy.…
Apr 15
Clarence Klassen posted a blog post
Yellow Submarine Original Artwork copyright 2012Many events happen during a turret winder index that make it very difficult to control tension. An old, but practical, technique for surviving an index is to put the outgoing spindle into Torque Hold m…
Apr 8
Clarence Klassen posted a blog post
Yellow Submarine Original Artwork copyright 2012While not the only cause, it is well known that tension variations cause a web to move in the cross-machine direction. The web displacement or movement can be in either direction, to the operator size…
Apr 1
Clarence Klassen commented on Clarence Klassen's blog post Regulator Tuning – Request for Metrics
"I agree with comments below"
Apr 1
Clarence Klassen posted a blog post
Yellow Submarine Original Artwork copyright 2012One of the drive tools available for turret winder applications is tension boost. This function is different than torque boost.Tension boost is not always required. It may be required if the winder inc…
Mar 25
Clarence Klassen commented on Clarence Klassen's blog post Regulator Tuning – Metrics
"In response to the comment by Dr. Birmbaum.
Of course in the steady state, the speed regulator response is less important. 
As you mentioned, the response to disturbances is present and in my experience critical.
Disturbances are seen in web handlin…"
Mar 20
Clarence Klassen posted a blog post
Yellow Submarine Original Artwork copyright 2012Many older drive systems rely on programming tools that will only run on older operating systems. The drive program may run only on an old DOS or Windows operating system. Newer operating systems on mo…
Mar 4
Clarence Klassen posted a blog post
Today most companies expect remote access troubleshooting from suppliers of drive systems. Remote access software over the internet and using Virtual Private Networks (VPN) or web-based remote access provide very useful connectivity.Technically remo…
Feb 25
Clarence Klassen posted a blog post
Yellow Submarine Original Artwork copyright 2012Permanent Magnet (PM) motors stators are very similar to synchronous or induction motor stators. The rotor is made of a shaft with a sandwich of steel layers (laminations) or alternately with a solid c…
Feb 19
Clarence Klassen posted a blog post
Yellow Submarine Original Artwork copyright 2012Synchronous motors stators are very similar to induction motor stators. The rotor is made of a shaft with a sandwich of steel layers (laminations) or alternately with a solid casting. The rotor require…
Feb 11
Clarence Klassen posted a blog post
Yellow Submarine Original Artwork copyright 2012 Induction motors are the simplest motors to manufacture. The rotor is made of a shaft with a sandwich of steel layers (laminations). The laminations have a ring of punchings. When aluminum or copper i…
Jan 28
Clarence Klassen posted a blog post
Yellow Submarine Original Artwork copyright 2012Variable Speed Drives today can be run with or without sensors. By sensors, we mean encoders, tachometers or resolvers. These are attached to the Opposite Drive End of the motor and give an RPM feedbac…
Jan 21
Clarence Klassen posted a blog post
When tuning speed regulators, at what speed the drive should be stepped and how large a step should be applied?First of all, the speed regulator is tuned very early in the life cycle of the mechanical equipment. Check with mechanical to ensure lubri…
Jan 14
Clarence Klassen posted a blog post
Recently week I was called in to a paper mill to look at a problem following a drive upgrade. This was an old machine that had one section running in tension control for about 40 years.The old drive used a dc generator. The new drive was a previousl…
Jan 6
Clarence Klassen posted a blog post
25 years ago, tension was indicated with a 4” (100mm) analog meter on the operator console. These meters were rugged, accurate to about 1%, and provided a nice degree of damping or filtering.Today, the analog meter is rare, replaced with a number or…
Dec 17, 2018
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