Studies on autolevellers in draw frame

Abstract

<span style="font-size:11.0pt;line-height:115%; font-family:" calibri","sans-serif";mso-ascii-theme-font:minor-latin;mso-fareast-font-family:="" "times="" new="" roman";mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:="" minor-latin;mso-bidi-font-family:calibri;mso-bidi-theme-font:minor-latin;="" mso-ansi-language:en-us;mso-fareast-language:en-us;mso-bidi-language:ar-sa"="">The results of the research work carried out on yarn count variation that could be achieved while using 3/3 drafting system fitted with a short-term, closed loop autoleveller are reported. It has been found possible to spin cotton yarns with a count CV of 1.2-1.4% while using autoleveller. For combed counts, single-passage post-comber leveller drawing appears to be sufficient. Due to the improvement in count CV as a result of the use of autoleveller draw frame, lea count CV improves by 1.2-1.6% and single yarn strength CV by 4%. End breaks in spinning also reduce substantially while using autoleveller draw frame. Of the total yarn count variation, between bobbin variation accounts for 60% and the within bobbin variation for the rest.</span>