The rovings from the carding set need to be twisted to produce yarn. At the Woolmill this is done on a spinning Mule. Rovings are fed through delivery rollers on to the 120 spindles on the mule carriage.

As the carriage advances, the rovings are drawn out and the fast turning spindles insert twist to produce a strong thread. As the carriage returns, the treads are wound on to bobbins mounted on the spindles and the process is repeated until full cops of yarn are produced. 

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