Abstract:

To solve the existing engineering problems in automatic bottom thread replacing devices in computerized embroidery machines on poor flexibility, inconvenience for extension, low efficiency of manual replacement of bottom thread, high labour intensity and the like, a modular design method for an automatic bottom thread replacing system based on the bus network and compatible with the embroidery machine master controller was provided. An innovative design of a flexible bobbin replacing device is performed, and an embedded control circuit board was used as a CAN node control unit, and constituted a nulti-node CAN bus network topology with the bottom thread replacement centralized controller. In this way, a distributed control over the bobbin device by the centralized controller is performed to  complete the replacement of bottom thread. Besides that, the optimized control method of the driving component was elaborated in detail. The field debugging results show that system is stable in operation, high in efficiency and strong in extensibility, and has good market application.

Key words: embroidery machine, CAN bus, replace bobbin, bottom line