Analysis of the Influence of Machining Errors on the Dynamic Characteristics of the Dobby Modulator

Abstract

In this paper, cam profile dynamic modeling and analysis of the cam slider modulator are presented. The nonlinear dynamic model is derived for the modulator equation with consideration of the flexible effect. The fourth order RungeKutta method is employed to for response solving. The lumped parameter and Monte Carlo simulation methods are also utilized. Modulator roller vibration with regard to the cam profile machining errors are analyzed. In order to analyze the vibrational response at different speeds, VB.net simulation is performed. The results demonstrate that the disturbed cam profile vibrates smoothly and randomly when the dobby speed is less than 400 r/min. Furthermore, it is observed that the operating dobby speed should not exceed 900 r/min. For disturbed cam profile system, when the speed of the dobby is less than 400 r/min, small follower vibration response is observed. When dobby speed is greater than 200 r/min, significant impact on the follower vibration response is observed.