Position accuracy analysis on needle bar mechanism of computerized embroidery machine

The needle bar mechanism of computerized embroidery machine is a six-bar mechanism with slide block.An analytical model of the position accuracy of the needle bar mechanism was set up by means of the complex-vector method,and the embroidery accuracy of the needle bar mechanism was analyzed.The expression of the embroidery error of the needle bar mechanism was obtained,the calculating program with MatLab were worked out,and the embroidery error of the needle bar mechanism of computerized embroidery machaine GY902A was calculated with the program.The regularity of the embroidery of the needle bar mechanism varying with the rotation angle of the crank was obtained,which has important reference value to the movement design of the needle bar mechanism of computerized embroidery machine and improvement of the quality of embroidery products.