Researching Electronic System of the SC-920 Control Circuit of the DDL-8700-7 Single Needle Sewing Machine and Application

The DDL-8700-7 is a single-needle electronic sewing machine that uses servo motor to drive the main shaft. This has advantages such as being noiseless, energy saving, automatic thread trimming, reverse feed, wiper, and lifting of needle bar highest position when stops... paper presents research results relationship between mechanical, electrical, parts SC-920 control circuit in machine; analyzing operating principle system according each block. In this study, theoretical experimental methods were used measure, test, evaluate parameters. obtained contribute building scientific basis for making test repairing circuits some electrical errors error code list SC-920, helping repairer identify defects repair replacement