Journal of Textile Research ›› 2019, Vol. 40 ›› Issue (01): 136-141.doi: 10.13475/j.fzxb.20180201806

• Machinery & Accessories • Previous Articles     Next Articles

Magnetic holding electronic needle selector and serial bus jacquard control system for circular knitting machine

PENG Laihu1,2(), WANG Luojun2, HU Xudong1,2, WU Zhenhui2, YUAN Yanhong1,2   

  1. 1. The Center for Engineering Technology of Modern Textile Machinery & Technology of Ministry of Education, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China
    2. Key Laboratory of Modern Textile Machinery & Technology of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China
  • Received:2018-02-01 Revised:2018-06-26 Online:2019-01-15 Published:2019-01-18

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Abstract:

Aiming at problems of existing needle selectors in jacquard circular knitting machine, such as slow operation speed, large unit to unit performance variation and easy overheating, a novel electronic needle selector employing fast forward and reverse gaussing/degaussing of solenoid actuator was presented. Based on the magnetization of the ferromagnetic material and the operating characteristics of selector solenoid, a new circuit drive and a control method of needle selector were proposed to switch and to maintain the states of the selector blade by alternating the magnetization direction of the semi-hard ferromagnetic material of the solenoid core. To meet the requirements of such needle selectors, a design of jacquard control system for circular bi-directional industrial serial bus architecture was also proposed for minimizing signal crosstalk and enhancing anti-interference performance in unidirectional parallel bus architecture. The resnlts show both the laboratory experiment and field testing demonstrate that the new system design can sustain temperature rise within 9 ℃ during operation. The maximum operating frequency of 65 Hz is obtained. Also the design enhances the serial bus's anti-jamming performance and improves the jacquard control system reliability.

Key words: circular knitting machine, jacquard, needle selector, magnetic retention, human-computer interaction

CLC Number: 

  • TS103.7

Fig.1

Diagram of core structure of needle selector"

Fig.2

Control system architecture"

Fig.3

Diagram of 'public end' drive circuit"

Fig.4

Diagram of 'free end' drive circuit"

Fig.5

Structure diagram of circular CAN bus network"

Fig.6

Structure diagram of human-computer interaction"

Fig.7

Flow diagram of main program"

Fig.8

Infrared thermography of temperature rise of needle selector"

Fig.9

Diagram of CAN communication sequence"

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