•Depending upon the arrangement of the
feed tube , the fibres can move into the rotor
in one of the two ways ,
viz . axial & tangential.
–In axial feed , centrifugal force
distributes the fibres within the collection
groove in a purely random fashion & in
accordance with an umbrella principle .
–This type of feed has three major
•Fibre orientation in the groove
is bad & the yarn quality is
•A large rotor diameter is needed
, & this limits rotor revolutions.
•The spun yarn has to be
withdrawn through the rotor axis.
–These problems led to the adoption
of the currently almost universal
tangential-feed technique. Here , the
rotation of the rotor , & a corresponding
air circulation within the rotor, ensure
ordered deposition of the
fibres in the groove.