Electronic Take-Up Systems and Pick Density Precision
topic
Electronic take-up systems use servo motors with encoder feedback advancing the cloth fell at precisely the programmed advance per pick that establishes the target pick density, with advance accuracy of plus or minus 0.05 millimetres per pick maintaining pick density within plus or minus 2 percent of specification throughout the warp length, and with take-up speed automatically adjusting when loom speed changes during startup and slowdown to maintain constant pick density regardless of instantaneous loom speed.
Role
Provides the mechanical control system that maintains pick density accuracy throughout the warp length by precisely controlling the advance rate that determines pick spacing, with electronic take-up eliminating the pick density variation at loom startup and shutdown that mechanical ratchet take-up could not prevent, and with the encoder feedback precision enabling the pick density accuracy that prevents the weft bar defects from pick density variation that would otherwise occur from take-up mechanism imprecision.