Study on the drive parameters of a high-precision basis weight control valve

Decreasing precision or mechanical damage may occur in basis weight valves because of excess design torque valves. Stepping motor driver current values are set at the rated motor current or are based on practical experience. Applied technological research on current setting values was conducted in this paper. A current-setting experimental device was developed to solve this problem. The drive parameters include the drive current value, mechanical strength of valve actuator and the state holding current value were tested. Finally, the acceleration time for the trapezoidal velocity curve was calculated, which was helpful to improve the positioning precision of the valve. The test result with a sample diameter of a DN125 basis weight valve showed that the reasonable current value stage was 3.71 A, and the state holding current value stage was 50%. Then, the acceleration and deceleration times of the trapezoidal velocity curve were both set at 0.01 seconds. The positioning precision was able to match the requirements of a basis weight control valve for 10,000 steps in which an error of 1 step was less than 5.0% during 10,000 positioning steps under such drive parameters.