Spinning process utilizing roving frames and ring-spinning frames

A method of producing yarn, comprising the steps of:

• (a) feeding sliver to a multiplicity of stations of a multiaxial-drive flyer frame with independent drives for at least some of the driven elements thereof, said driven elements including flyers, bobbins, a bobbin rail and a drafting frame of the flyer frame, and controlling said independent drives to produce roving bobbins with a starting-winding height of about 460 mm to about 560 mm, a greatest-winding height of about 460 mm to about 560 mm and a greatest-winding diameter of about 190 mm to about 230 mm and a bobbin weight in excess of 4 kg;
• (b) using an automatic bobbin-change mechanism on said flyer frame doffing fully wound bobbins from said flyer frame with said starting-winding height of about 460 mm to about 560 mm, said greatest-winding height of about 460 mm to about 560 mm and said greatest-winding diameter of about 190 mm to about 230 mm and said bobbin weight in excess of 4 kg, and suspending the fully wound bobbins from respective hangers of a suspension carriage train;
• (c) displacing said fully wound bobbins on said suspension carriage train along a track to a creel of a ring spinning frame;
• (d) storing said fully wound bobbins in said creel;
• and
• (e) spinning yarn in said ring spinning frame from fully wound bobbins transferred from said creel to said ring spinning frame.