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, motor speed, stop position depends only 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 a fixed point of view, called & other; Interval Angle & throughout; , its rotation is based on the Angle of the fixed step by step. Can be controlled by controlling the pulse number of angular displacement, so as to achieve the purpose of accurate positioning; As well as by controlling the pulse frequency to control motor rotation speed and acceleration, so as to achieve the purpose of regulating. At present, with the improvement of automation degree, 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 line color or length, if because of accident may cause the instruction or logo is not clear, how to judge whether a connection is the difficult thing. Below small make up to introduce stepper motor phase sequence of how to determine 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 stepping motor each of the five lead is white, blue, brown, yellow, HongWu colours. 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, one of the root pens and five lines to any of the root, the other pens and pick up another four fuses, respectively, when measured all the 4 wire resistance are all equal, is one of the root pens and the public. As above case, find out the white lead to public. 2, looking for 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, respectively, to touch the remaining four pinout, when encounter a thread stepper motor rotate a little bit,Can also hold the motor shaft by hand to feel whether stepper motor rotation)Said, stepping motor winding and the rotor is in its adjacent position, after electrify coil can start, in the example above the red lead. And then touch adjoining with the cathode lead wire, if the stepper motor to turn, said this red lead wire windings of the adjacent phase, such as yellow lead. According to this method, directly to find out the order of the four phase. If the test of stepper motor is with the reduction gear, because speed is slow, so after winding electricity, look not to come out the rotation of the motor shaft, available at hand hold to feel axis stepper motor shaft rotation. Above is the phase sequence of how to determine the stepper motor is introduced, although the stepper motor has been widely used, but the step motor is not like a normal dc motor, ac motor under normal use. It must be driven by double annular pulse signal and power circuit of control system can use. So good with step motor is not easy, it involves the mechanical, electrical, electronic and computer and many other professional knowledge.
