The spinner has the last and final chance to improve the quality of yarn. It is the last process that helps to minimise the yarn irregularities. The unevenness present in the sliver gets passed into the yarn after the draw frame process. The best draw frame process practice makes a very big difference in the evenness and other yarn irregularities. The performance of the draw frame process depends upon the parameters selected in the process. The selection of the correct process results in the form of improved performance of the draw frame machine.
The main factors affecting the performance of the draw frame machine are given below:
•The fibre length of the raw material used.
• The total draft to be used in the draw frame.
• The fibre fineness of the raw material to be used.
•The number of doublings to be used in the draw frame machine.
• The type of drafting system to be used in the draw frame machine.
• The weight per unit length of sliver to be fed to the draw frame machine.
•The number of the draw frame passages.
• the delivery speed of the draw frame machine.
•The break draft in the draw frame machine.
• The type of auto leveller used in the draw frame.
• The setting of auto leveller.
