Stepping motor controller is a kind of to a uniform pulse signals of electronic products, it signals enter the stepper motor drives, can by the drive into a stepper motor need strong current signal, drive the step motor running. Stepper motor controller can accurately control stepping motor turned every Angle. drive is receives the pulse signal, each received a pulse, one pulse motor to motor drive around a fixed point of view, because the characteristics of stepper motor is widely used in various industries. Driving circuit 1
in the application of stepping motor, is one of the most important items to consider design matches the driving circuit. Stepper motor dynamic performance very much depend on the driving circuit. Figure 1 shows the structure of stepping motor driven system. Driving a stepper motor need to switch from one stator winding current to another. This kind of switch function provided by the driver circuit, drive circuit arrangement, distribution and magnified from pulse sequence signal circuit. Stepper motor windings in the specified order is motivation. the practicability of integrated circuit has been made for the rated current is less than 3 amperes small stepper motor driving circuit using discrete component structure is unnecessary. SGSL7180 and L7182, for example, for a single drive, polarity and L293 and L298 for bipolar drive, can be easily used in the controller of tightly. (2](3]Step mode
2 stepper motor to drive the stepper motor to obtain the location of the resolution, mainly are limited by the structure design of the stepper motor. From the earliest each loop four steps of stepper motor to each loop 400 steps of step motor, there has been a huge step in the resolution. However, for high precision positioning applications, even the position resolution are not enough. For example, are used to produce electronic integrated circuit of a specific device, may need to mechanical movement control just to step only about 0. 1 micron. Now that is the smallest step in the stepper motor can produce by its mechanical design (Mainly in the stator and the number of the teeth on the active cell and electrode)Determined by the limit is reached soon, at that point, in order to improve the resolution, must use other method to split step Angle. This article describes a way to complete the improvement of resolution. Stepper motor operation is the essence of stator current timing sequence, by properly controlling the stator current timing sequence, step electric opportunity driven by the positioning resolution. Segmentation is the most important benefits of technology improves the position resolution, the characteristics of the other is to reduce the ripple torque, especially at low speed of motor. Through the segmentation technology, by the high frequency pulse rate and smaller interval Angle, step to gain and loss is reduced and resonance also not be triggered.
