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Systematic method for determining the controller gains in a multi-span web line
(Oklahoma State University, 2019-06)
A web line may have multiple locations where feedback systems are used to control web and roller speeds, and web tension. The Euclid Web Line (EWL) in the Web Handling Research Center at Oklahoma State University is such ...
Evaluation of physical properties of thin film and measurement of unsteady thermal stress
(Oklahoma State University, 2019-06)
Winding defect such as the roll wrinkles or slips to lose the value of the product. Winding defect is caused by the internal stress condition in the roll and the temperature change of the roll after winding. Therefore, it ...
Roll-to-roll gravure printed smart food package to replace the "use-by" date system of foods
(Oklahoma State University, 2019-06)
The implementation of internet of things (IoT) to the food industry offers a great deal, accompanying each functional unit from production to the consumption to ensure the quality of a particular food item. Among several ...
Roll variability analysis for non-statisticians
(Oklahoma State University, 2019-06)
Roll variability can be characterized by several different methods. Off line cross-direction (CD) scans of thickness or coat weight give a snapshot of CD variation over a small machine-direction (MD) range. Roll hardness ...
Mechanics of cambered web belts on aligned rollers
(Oklahoma State University, 2019-06)
The lateral deformations of webs in roll-to-roll (R2R) process machines can affect the quality of the manufacturing process. Webs can enter a cylindrical roller normally if the forces required to sustain normal entry and ...
Web length creep in wound rolls
(Oklahoma State University, 2019-06)
For convenience, webs are stored in wound rolls. The available web length in a wound roll is one mark of roll quality and a concern for many who process and convert webs. Elastic winding models have proven very precise at ...
Taxonomy of web and winding defects
(Oklahoma State University, 2019-06)
Constructing taxonomies can be useful for the researcher and troubleshooter alike. First, it gives us a precise language for conversation within our own plant or with our customers. This language helps us avoid using the ...
Exploring the strain transport formula
(Oklahoma State University, 2019-06)
The strain transport formula relates the velocity of a moving web to its strain. It is based on the conservation of mass which, when applied to webs, becomes the conservation of relaxed length. Simply stated it says, the ...
Controller gain scheduling in a multi-span web line
(Oklahoma State University, 2019-06)
Gain scheduling is a common method of variable gain feedback control used to account for changes in the diameters of an unwind roll and a rewind roll during the operation of a web line. This paper focuses on three methods ...
Control of the web lateral position and slope by employing spatially dependent transfer functions
(Oklahoma State University, 2019-06)
In this work, we employ a non-dimensional state space representation of the spatially dependent lateral transfer functions to study web lateral position behavior in response to lateral displacement and rotation of the guide ...