Development Of Control System For Fully-Automatic Industrial Lockstitch Sewing Machine

Along with the rapidly development of clothing trade in China, the demand quantity of sewing equipments to the correlation is more and more, especially, the industrial lockstitch sewing machine also obtained the fast development as the main equipment in the clothing processing industry, the former common production has not already been able to satisfy the market demand, at present, the fully-automatic, straight driving, high speed industrial lockstitch sewing machine receives the market favour, on behalf of industrial lockstitch sewing machine development direction.This article obtains from the fully-automatic, straight driving, high speed industrial lockstitch sewing machine's principle and the function, has determined overall plan of control system based on the permanent magnetism AC servo technology, has selected permanent magnet synchronous motor and absolute magnetoelectricity encoder, uses 32 bit single-chip, Mitsubishi Corporation's third generation intelligent power modules and TI Corporation's monolithic switching power chip as the core component, has designed the main hardware in the fully-automatic, straight driving, high speed industrial lockstitch sewing machine, and has carried on a great lot of debugging and experiment, greatly strengthened the entire control system reliability through revising power module actuation electric circuit plan, has solved the problem that the electromagnet reliably attracts gathers in the width voltage scope, through using back-fly switching power supply for the electromagnet power supply. And has designed the user function program in the base of whole control program frame, then has carried on the entire machine debugging, and revised and perfected the user function program. System has realized automatically stopping the needle, automatically back sewing, automatically cutting line, automatically dialing line. And system can freely complete the free sewing, the certain length sewing, the repeated sewing and the trademark sewing.Finally, this article has carried on the entire machine performance test, indicated the main targets of control system already achieved or has surpassed the domestic and foreign homogeneous types machine.