Converting Blogs
Turret-positioning requirements: Part 1
By Clarence Klassen Turret winders should index (rotation of the turret) to a level position. How accurate should the level position be? The more accurate the positioning, the better. I will list several concerns that may call for very precise positioning of the turret. I used my drafting program to model a turret winder capable […]
Dave’s Favorite Defects: Interleaving
By Dr. David R. Roisum Interweaving or stuck rolls are costly defects because every occurrence means the loss of not just one, but two finished wound rolls. This defect is one of the more difficult of the winding troubles to troubleshoot. Even so, we are guided by the science of web handling, most particularly the […]
Software crashes
By Clarence Klassen A while back, my computer drive and PAC software stopped working. I was able to borrow a different computer at my client’s today. Now I am in my hotel room, reinstalling software. The TV is on with Chicago playing Boston. Regular time ends in a tie. My software is not loaded yet. […]
Software crashes
By Clarence Klassen A while back, my computer drive and PAC software stopped working. I was able to borrow a different computer at my client’s today. Now I am in my hotel room, reinstalling software. The TV is on with Chicago playing Boston. Regular time ends in a tie. My software is not loaded yet. […]
Dave’s Favorite Defects: Gage bands
By Dr. David R. Roisum Gage (caliper, density, thickness) bands in a wound roll teach us two things. First is that, for most profile-related defects, you should wind as loose as possible. Second is that winding loose may not be enough, in which case you need to diagnose and reduce the root-cause mechanics of streaky […]
Dave’s Favorite Defects: Gage bands
By Dr. David R. Roisum Gage (caliper, density, thickness) bands in a wound roll teach us two things. First is that, for most profile-related defects, you should wind as loose as possible. Second is that winding loose may not be enough, in which case you need to diagnose and reduce the root-cause mechanics of streaky […]
Dave’s Favorite Defects: Cutting
By Dr. David R. Roisum Most webs are cut at least once, if not many times prior to reaching the end-user customer. This cutting operation is cause for many complaints on a wide variety of products including paper, film, foil, nonwovens, textiles, tissue and more. These many complaints all somehow involve the edge of the web being […]
Dave’s Favorite Defects: Cutting
By Dr. David R. Roisum Most webs are cut at least once, if not many times prior to reaching the end-user customer. This cutting operation is cause for many complaints on a wide variety of products including paper, film, foil, nonwovens, textiles, tissue and more. These many complaints all somehow involve the edge of the web being […]
Dave’s Favorite Defects: Curl
By Dr. David R. Roisum. Curl is seen on a wide variety of chemistries including paper, film, foil, nonwovens, textiles and more. What is common between ALL of the types of curl is that the top side of the web is different than the bottom side. What makes the different types of curl is the distinctly different ways the […]
Dave’s Favorite Defects: Curl
By Dr. David R. Roisum. Curl is seen on a wide variety of chemistries including paper, film, foil, nonwovens, textiles and more. What is common between ALL of the types of curl is that the top side of the web is different than the bottom side. What makes the different types of curl is the distinctly different ways the […]