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1) Bad condition of doffer wire.
2) Doffer not set parallel to cylinder.
3) Cylinder and flats or doffer set too wide.
4) At the doffer, fibers are removed and eventually enter the card sliver.
5) Feed roller is driven by an electronic frequency converter which permits stepless variation of its speed and is controled to be synchronized with doffer by the computer.
6) High - speed electric machinery and tooth belt are adopted for doffer transmission, realizing stepless speed changing.
7) Faulty air current under the licker in, cylinder & doffer.
8) In the case of cotton and NetEase to sink, you can increase the doffer and tension between the pressure roller draft to improve the quality of Web.
9) FG Series Bare Cylinder Grinder is used for grinding and modification of Cylinder and Doffer.
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