Rapier Loom Speed and Fabric Width Relationships
topic
Rapier loom weaving speed in picks per minute decreases with increasing fabric width as the time required for rapier traversal across the wider shed constrains the maximum picks per minute, with typical speeds of 400 to 600 picks per minute at 190 centimetres width reducing to 200 to 350 picks per minute at 400 centimetres width, making specific insertion rate expressed in metres of weft per minute the more meaningful productivity metric that remains more constant across widths than picks per minute and enables direct comparison between different width looms.
Role
Defines the productivity scaling relationship that guides loom width selection for production planning, with wider looms producing more fabric per metre of width per unit time than multiple narrow looms from the reduced selvedge waste proportion in wider fabric, but with the speed reduction at greater width reducing some of the productivity advantage from width and requiring the calculation of net fabric output per machine hour to correctly compare the economics of different width configurations for each fabric specification.
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