Abstract: For the validity of yarn carries control in computerized flat knitting machine, This paper presents a design approach of secondary control combined with PC104 module and FPGA . By analyzing pattern documents to get the control data, the host computer utilizes the PC104 bus to transfer them to the slave computer. FPGA with double buffer, accomplishes the data analysis, processing and execution according to the needle position sensor information and achieves up to 32 the yarn carries scheduling. Application results prove that, this method makes full use of strong processing capacity of the PC104 module and FPGA, yarn carries scheduling is stable and extensible, FPGA resource consumption is small, which has high practical value.

Key words: computerized flat knitting machine, yarn carries control, PC104, FPGA