Formation OF The Yarn

  • The yarn end is pressed against the rotor wall by the high centrifugal force, & the separation point therefore rotates within the rotor .
  •  Each revolution of the yarn at this point inserts one turn of twist.
  • The yarn twist penetrates into the fibre ring in the collecting groove, where the fibres are to be bound together to form a yarn.
  • The length of this binding in zone is of some significance for the spinning conditions & the the yarn characteristics.
  • If this length is too short , the ends-down rate will be high ;
  • If it is too long , twisting-in will be very tight , & there will be many wrapping fibres


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