| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method and a device for controlling a draft device at a fore-spinning step, which allow a belt-like fiber bundle sent out from the draft device in a lead-out operation to easily pass through a gatherer. <P>SOLUTION: A method for controlling a draft device 11 includes the draft device 11 in which a front bottom roller 13, a middle bottom roller 14 and a back bottom roller 15 are independently driven by a front roller drive motor 28, a middle roller drive motor 30 and a back roller drive motor 32, respectively. A device 37 for controlling the draft device 11, includes a CPU 38 constituting draft ratio changing means for controlling the front roller drive motor 28, the middle roller drive motor 30 and the back roller drive motor 32 so that a draft ratio in a lead-out operation becomes greater than that in stationary operation. <P>COPYRIGHT: (C)2012,JPO&INPIT |
