Journal of Textile Research ›› 2020, Vol. 41 ›› Issue (06): 161-167.doi: 10.13475/j.fzxb.20190505707

• Machinery & Accessories • Previous Articles     Next Articles

Control technology for density motor used in seamless underwear machines

DAI Ning, HU Xudong, PENG Laihu(), ZHONG Yaosen   

  1. Key Laboratory of Modern Textile Machinery & Technology of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China
  • Received:2019-05-23 Revised:2020-03-06 Online:2020-06-15 Published:2020-06-28
  • Contact: PENG Laihu E-mail:laihup@zstu.edu.cn

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Abstract:

Facing the problem that the control of the density motor used in current seamless underwear machines is unstable, this research was carried out to investigate the performance characteristics of the density motor, proposing a density motor control scheme based on CAN bus. According to the processing characteristics of the density motor control stitch cam, the overall implementation of the control technology was expounded. The key circuit design and program algorithm was studied, and the protocol for controlling the action characteristics of the density motor was established. In order to avoid the long-term operation of density motor appearing the horizontal stripes caused by the lost step phenomenon, detecting error mode by zero-return was proposed. The test results indicate that the control technology facilitate the position control of the density motor and improve the stability of the seamless underwear machine density motor control, with cost savings compared to density motors with encoders, meeting the control requirements of the seamless underwear machine for the density motor.

Key words: seamless underwear machine, CAN bus, circuit design, program algorithm, density motor, detecting error mode by zero-return

CLC Number: 

  • TS103.7

Fig.1

Figure of triangle arrangement of seamless underwear machine(a)and structure of density motor and circle forming triangle(b)"

Fig.2

Overall structure of seamless underwear machine density motor control technology"

Fig.3

Schematic diagram of two control methods. (a)Traditional method;(b)Improved method"

Fig.4

Control circuit diagram of density motor drive board"

Tab.1

Protocol of density motor action"

29位扩展帧 数据段
9~29位 Data[0] Data[1] … Data[8]
预留 状态 密度电动机1 … 密度电动机8

Fig.5

Flow chart of density motor action protocol analysis algorithm"

Fig.6

Diagram of density motor position"

Fig.7

Flow chart of density motor action execution program algorithm"

Fig.8

Flow chart of density motor zeroing and debugging algorithm"

Fig.9

Diagram of experimental platform construction"

Fig.10

Diagram of waveform about P pin and S pin of ARM processor"

Tab.2

Statistics of lost step test"

测试次数 报警时间 报警类型
第1次 2019-2-28-14∶33∶17 8号密度电动机异常
第2次 2019-2-28-14∶33∶27 8号密度电动机异常
? ? ?
第8 639次 2019-2-29-14∶32∶57 8号密度电动机异常
第8 640次 2019-2-29-14∶33∶07 8号密度电动机异常
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