• The hardness of the traveller should be less than the hardness of the ring surface. This practice helps to optimise the life of the ring surface. The traveller is cheaper than a ring, so that maintenance cost is also gets reduced. The replacement method of traveller is easier in comparison ring so that reduced downtime also helps to optimise the efficiency of the machine.
• The weight of the traveller gets selected according to the spindle speed, yarn count, yarn strength and material to be processed. Low traveller weight results in the form of low bobbin density and low cop content. The higher traveller weight causes high yarn tension. The ends breakages get increased.
• The break draft in the ring frame process is employed to the total draft in each case since the main draft does not exceed 25 to 30.
• In the winding of a layer, when the ring rail gets moved upward direction, the rail traverse speed is low at the bottom and increased at the top position.
When the rail comes downward direction, the rail's traverse speed gets maximum at the top position and minimum at the bottom portion.
This gives a ratio between the length of yarn in the main (up) and cross (down) windings about 2:1.
Objectives of carding process
Objectives of mixing and blow room
Objectives of drawing ( draw frame process)
Cotton spinning process chart
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