There are several basic methods to produce
beamed yarns/strands:
The first method, used mostly for
electronic application is the direct warping: a large and predetermined
number of ends pulled from a creel are wound onto a large spool (beam)
placed on a warper to produce section beams .Then a
predetermined number of them are assembled on a slasher to
generate a loom beam which will be used in the further processing
step. During the slashing operation a secondary sizing is applied
to the ends in order to enhance their abrasion resistance.
Some applications don't require the slashing operation, section beams
can be directly used in the further textile process or a determined
number are assembled on a beamer to make up a loom beam.
The second method to prepare loom beams involves sectional warping.
In this case a sheet of ends pulled from of limited number
of packages placed on a creel are wound onto the cylinder of the sectional
warping machine to build a section. When the required amount of
warp end sheets, necessary to achieve the desired fabric width, have
been completed and placed side by side, all the sections are rewound
directly on a beam to constitute the loom beam.
Another method is the warping sizing: a predetermined number
of ends pulled from a creel are directly slashed and wound onto a
beam. Then the slashed section beams are assembled together
on a beamer to produce the loom beams.
Remarks: Some applications using warp ends don't utilize beams,
instead the textile process is directly fed from a creel.
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n
many case the first textile operation is the preparation of the lengthwise
ends system (warp or beamed yarns) of the textile structure 
