New Sewing Equipment Motion Control System Research And Design

The new-type sewing machines' main characteristic is that collaboration of each mechanism is done by control software and the control centre is micro-computer. This paper analyses the demand of motion control system of new-type sewing machines and discusses the characteristic of three control pattern(main shaft constant speed , main shaft variant speed, main shaft interpolation)used in motion control card. The author raises a new control system based on counter card.The control system hardware platform is composed of motor, driver, motion control card and computer. There are three steps to construct the hardware platform. First, select the motor and driver according to the parameter of mechanism. Second, select the motion control card according to characteristic of sewing machine multi-axes motion. At last, select the control computer according to the function of sewing machine. The software platform adopts Linux that has been tailored, extended and optimized.The author designs the PCMC card which used to do motion control, on the base of analyzing the characteristic of multi-axes motion. The output frequent of counter is changed by the counter value. The motor's speed is controlled by the output frequent and the angle is controlled by the pulse. The counters are controlled by software.The control system based on PCMC card could realize the function of new-type sewing machines. Its' performance is better than motion control card. It can broadly apply to new-type sewing machines.