Independently of the warping system, the threads are fed from bobbins placed on creels. The creels
are simply metallic frames on which the feeding bobbins are fitted; they are equipped with yarn
tensioning devices, which in modern machines are provided with automatic control and centralized
tension variation.
Moreover the creels are equipped with yarn breakage monitoring systems (fig. 5).
The creel capacity is the parameter on which the number of warping sections or beam s depends; it
should be as high as the installation type and planning permit; the usual creel capacity amounts
today to 800-1200 bobbins.
Various solutions have been designed to reduce the time required to load the creel and thus
increase the warping performance (fig. 1, 2, 3, 4). When standard creels are used, the most costeffective
solution is, provided that there is sufficient room available, to use two creels for one and
the same warping machine; in fact, while one of the two creels is used for warping, the other creel
can be creeled up again. In this case it is advisable that the reserve creel is equipped with comb
holder and that the warp threads are already drawn through the dents of the combs. This way the
loss of time caused by creel change can be minimized.
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