Crepe Structure Measurement Crepe Structure Measurement x Standard sensor modular design allows installation in any slot inside the measuring head x There are no moving parts in the sensor module, which minimizes maintenance needs and ensures a long lifetime x Up to four images per scan are available in Experion MX from operator-defined cross direction locations for visual analysis and trouble-shooting x An “Image Gallery” display shows 8 images each representing reel average crepe structure characteristics. These are displayed around grade dependent reference image for comparison x In single point operation, images are transferred periodically at a fixed rate for operator observation Description The measurement is designed for online use in the challenging tissue machine environment. Fast image capture allows reel speeds up to 2600 m/min (8530 ft/min) without reduction of image quality. The measurement automatically adjusts illumination
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and imaging parameters for varying speeds. An intelligent operating algorithm mitigates the effect of uneven illumination, ambient light, and dirt/dust buildup. Images are captured and analyzed at the rate of 10 Hz. Folds/length reports crepe folding per length unit (typically inches or centimeters). This correlates with creping blade wear: new blade produces high folds/length and worn blade low values. Macro and Micro Crepe indicate folding types categorized as in long and short wavelengths. Caliper indicates crepe dominant sheet thickness. With new blade macro and caliper are typically low and micro high. As the blade wears, macro and caliper will increase and micro decreases.
The system displays the latest captured surface image to operator for visual analysis.
1* Application dependent additional measurement
Folds per inch. Upward peaks occur after creping blade change
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