Dobby Loom Speed Optimisation
topic
Dobby loom speed optimisation balances the production rate benefit of higher picks per minute against the warp break rate increase from higher yarn tension and impact forces at elevated speeds, with maximum practical speeds of 400 to 600 picks per minute for rapier dobby looms and 600 to 900 for air-jet dobby looms depending on fabric construction, yarn quality, and dobby mechanism type, with speed limits set by the slowest-responding shaft in the dobby array from variation in spring force and mechanism wear.
Role
Maximises weaving room throughput within the quality constraints of each fabric construction by identifying the speed at which the combination of warp break rate, weft insertion reliability, and fabric quality together produce maximum net production at acceptable quality, with speed optimisation requiring systematic evaluation of multiple interacting parameters rather than simple maximum speed setting that ignores the quality and efficiency costs of operating beyond the reliable speed capability of the installed dobby mechanism.
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