Textile machine, standby position determining method of driven member of winding unit, and winding unit

Abstract

A stepping motor moves an upper-yarn catching member (30) by an amount corresponding to a specified number of pulses. A magnet sensor detects an origin position, which is a reference position, of the upper-yarn catching member (30). A number-of-pulse counting section obtains an actual measurement value, which is the number of pulses necessary for moving the upper-yarn catching member (30) from a target position to the origin position. A drive control section determines a standby position of the upper-yarn catching member (30) in view of the actual measurement number counted by the number-of-pulse counting section, a theoretical value, and the origin position.

Description

technical field [0001] The present invention relates to fiber machinery. Specifically, it relates to a structure for accurately aligning a driving member included in a textile machine toward a target position. Background technique [0002] Textile machines such as automatic winders are equipped with various drive components (components driven by motors, etc.) such as components for catching upper or lower yarns and piecing devices. As a method of driving the driving member, a configuration in which the output of one motor is transmitted to a plurality of driving members using a cam or the like, and a configuration in which a dedicated motor is arranged for each driving member are known. Japanese Patent Application Laid-Open No. 2009-203008 discloses a textile machine having the latter structure. [0003] The textile machine disclosed in Japanese Patent Laid-Open No. 2009-203008 is modularized by dividing the winding unit into a plurality of sections and disposing a control...

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