Knitting mechanism controller design of circular knitting machine based on double bus architecture

PENG Lai-hu1， YANG Min1， SHI Wei-min1， TANG Wei1， LIU Feng-chen2
（1. College of Machinery and Automatic Control， Zhejiang Sci-Tech University， Hangzhou 310018， China；
2. Hangzhou Wahaha Group Co. Ltd.， Hangzhou 310009， China）

Abstract： Aiming at the problems of various forms，multi triangles and feeders of the knitting mechanism in circular knitting machine，complexity of the existing control circuit，mutual interference in drive circuit，a design project of the knitting mechanism control module of circular knitting machine based on double bus architecture was proposed with modular design. The hardware circuit of control module，the realization of the CAN bus and RS485 bus multi-node communication and the implementation of the application layer protocols in the knitting mechanism control module of circular knitting machine，the CAN and RS485 driver were discussed. The test of instantaneity shows that the control module meets with the requirement of high instantaneity as the time of double bus data transmission is the same as the theories value. The results of the control module running indicate that it has a stable performance，anti-jamming ability and easy scalability.
Key words： double bus architecture；CAN bus；RS485 bus；multi-node