Research on Device Control System Design Based on Stepping Motor

Abstract

Applying stepping motor to motion control system of equipment can make the device achieve the objective of two-dimensional motion control. Firstly, the paper defines the motion control scheme of system. Then, the paper makes detailed analysis on central processing unit and motion controller of hardware in system, and analyzes the software. The paper takes medical facility as an example. And the test proves that the system works well, which accurately implements the automatic positioning functions including corotation, reversal, acceleration and deceleration and pause, and achieves the design requirements. System Development Background As a digital servo executive component, stepping motor has the advantages of easy structure, reliable operation, easy control and good control performance, so stepping motor is widely applied in low-end market as the motion control system of executive component. A medical facility is applied to make test analysis on the features of a medical reagent. The appliance consisting of test tube placing stage, screw and two stepping motors is placed in a seal box. The top of the box is fixed by a titration tube titrating reagent, and connects with external reagent bottle and the control circuit. The test tube placing stage is used to place the test tube vertically, in which 12 × 8 cylindrical grooves are distributed. Two stepping motors connects with test tube placing state with the structure of screw, and are used to control test tube placing state to move in the direction of X and Y. And the tested solution of 12 × 8 test tubes is titrated orderly. And controlling the movement of the test tube placing can make it open the box door, which is easy for operators to take out or place in test tube. When test tube placing station moves in the direction of Y, the stepping motor and the screw in direction of X moves. When it moves in the direction of X, only test tube placing stage moves, and the stepping motor indirection X has no displacement in direction of X. In order to ensure that the tested solution in testing tube and titration react normally under the given temperature, the temperature in the seal box should be constant. There is a door on the side of the box, which can control test placing stage in or out of calorstat, which makes it convenient for operators to place test tubes. The paper researches tow-axle stepping motor motion controller, and the controller is required to achieve the following functions.