Sliver Evenness Measurement and Periodic Fault Detection
topic
Drawing sliver evenness is measured by capacitive USTER evenness testers recording continuous linear density variation as CV percent and spectrogram wavelength spectrum, with periodic fault detection identifying machine-caused regularity at specific wavelengths corresponding to drafting system component rotation periods that indicate mechanical defects requiring maintenance intervention before the periodic fault reaches yarn production.
Role
Provides the quality monitoring data for drawing room process control by detecting sliver evenness deviations from normal that indicate mechanical problems in drafting rollers, gears, or drive systems before the associated yarn periodicity causes visible fabric faults, enabling condition-based maintenance scheduling that prevents defective yarn production from reaching weaving or knitting machines.
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