Stepper motor stepper motor is the electrical pulse signal into angular displacement or linear displacement of open loop control stepping motor. In the case of the overload, the speed of the motor, the orientation of the suspension only depends on the pulse signal frequency and pulse number, and not affected by load change, when the stepper driver receives a pulse signal, it is driving a stepper motor according to set the direction of the rolling a fixed Angle, called & other; Interval Angle & throughout; , its rotation is based on the Angle of the fixed step by step. Through manipulation of the pulse number to control the amount of angular displacement, so as to achieve accurate positioning of intent; Together to be able to scroll through the manipulation of the pulse frequency to control motor speed and acceleration, so as to achieve the intention of the speed regulation. Now, with the improvement of automation, stepper motor more and more application in the production. Under the normal mood wish, to distinguish the stepping motor phase sequence and head end mainly rely on external guide wire color or length, if because of accident may cause the instruction or logo is not clear, how to distinguish wiring is hard work. Below small make up how to introduce the step motor phase sequence discriminant method. Stepper motor shows no lead wire winding phase sequence, can use a multimeter and dc power to find lead phase sequence. For example a four phase step motor 5 root separation inlets are white, blue, brown, yellow, HongWu kinds of colour. For four phase four groups of stepper motor winding, has a head are connected together (The public side)So there are five stitches. 1. Look for the public side with the multimeter in R× 1 ', during which one of the pens and pick up 5 root thread root, the other pens and other four fuses separation, when measured all the 4 wire resistance are all equal, during which a root pens and is public. As above case, find out the white lead to public. 2. Find the adjacent phase sequence a)First the power transferred to the stepper motor nameplate indicating voltage value. b)Will be positive by public power supply, the cathode separation to touch the remaining four pinout, when encounter a thread stepper motor rolling a bit (A hand to hold the motor shaft, also can be used to whether feel stepper motor rolling), which indicates that the stepper motor winding and the rotor is in adjacent azimuth, coil can start after the power supply, in the example above the red lead. And then touch adjoining with the cathode lead wire, if the stepper motor to turn, show that the red lead wire windings of the adjacent phase, such as yellow lead. According to this way, the order directly to find out four phase. If the test by the stepper motor is a reduction gear, because speed is slow, so after winding current, the motor shaft scroll look not to come out, available at hand to knead a stepper motor shaft feel rolling shaft. This is phase sequence how to distinguish the stepper motor is introduced, although the stepper motor has been widely used, but the step motor and not like a normal dc motor, communication machine used in practice. It has to be made by double annular pulse signal and power drive circuit and so on control system before use. So good with step motor is not easy, it involves the mechanical, electrical, electronic and computer and many other professional knowledge.
