Method and device for controlling winding in circular knitting machine

Abstract

In a winding control method and device for a circular knitting machine, in a position control mode in which control is performed such that winding is performed in a winding amount corresponding to position control data, a winding control portion ( 6 ) changes production amount data in response to a change in specific knitting data which affects a production amount of the knitted fabric during operation, of the knitting conditions, and sets the position control data corresponding to the winding amount of the knitted fabric such that the position control data changes in synchronization with the change in the production amount data.

1 . A winding control method for a circular knitting machine which winds a tubular knitted fabric produced by a knitting portion on the basis of set knitting conditions for the knitted fabric, by a winding mechanism portion including a winding roller and a winding servo motor for roller drive and controls the winding mechanism portion by a winding control portion, the method comprising:
 providing a position control mode in which control is performed by the winding control portion such that winding is performed in a winding amount corresponding to position control data; and   changing production amount data, in the position control mode, in response to a change in specific knitting data which affects a production amount of the knitted fabric during operation, of the knitting conditions, and setting the position control data corresponding to the winding amount of the knitted fabric such that the position control data changes in synchronization with the change in the production amount data.   
     
     
         2 . The winding control method for the circular knitting machine as claimed in  claim 1 , wherein
 the specific knitting data includes at least one of knit structure data, stitch number data, knitting timing data, and used yarn data, and   a change in the production amount data corresponding to a change in the specific knitting data is previously stored, and the changed position control data is set on the basis of the change in the specific knitting data.   
     
     
         3 . The winding control method for the circular knitting machine as claimed in  claim 2 , wherein the specific knitting data is set per one course of a knit structure. 
     
     
         4 . The winding control method for the circular knitting machine as claimed in  claim 1 , wherein a change in knitting operation data corresponding to a change in the specific knitting data of the knitting conditions is previously stored, the knitting operation data and predefined data corresponding to the production amount data are collated, production amount data is obtained from matched predefined data, the production amount data is changed by repeating this, and the position control data is set such that the position control data changes in synchronization with the change in the production amount data. 
     
     
         5 . The winding control method for the circular knitting machine as claimed in  claim 4 , wherein the knitting operation data is rotation speed data of the knitting portion. 
     
     
         6 . The winding control method for the circular knitting machine as claimed in  claim 5 , wherein the rotation speed data and the predefined data are collated per one course of a knit structure, and if the rotation speed data has not changed, setting of the production amount data and the position control data is kept as it is without obtaining production amount data corresponding to matched predefined data and synchronizing the production amount data and the position control data, and collation is performed for a next course. 
     
     
         7 . The winding control method for the circular knitting machine as claimed in  claim 5 , wherein four types of the predefined data are set, first data is predefined data of an inching speed, second data is predefined data of a low speed lower than the first data, third data is predefined data of an intermediate speed higher than the first data, and fourth data is predefined data of a high speed higher than the third data. 
     
     
         8 . A circular knitting machine which winds a tubular knitted fabric produced by a knitting portion on the basis of set knitting conditions for the knitted fabric, by a winding mechanism portion including a winding roller and a winding servo motor for roller drive; and comprises a winding control device configured to control the winding mechanism portion by a winding control portion, wherein the winding control portion is configured
 to provide a position control mode in which control is performed such that winding is performed in a winding amount corresponding to position control data,   to change production amount data in response to a change in specific knitting data which affects a production amount of the knitted fabric during operation, of the knitting conditions, and to set the position control data corresponding to the winding amount of the knitted fabric such that the position control data changes in synchronization with the change in the production amount data.