Stepper motor stepper motor as a kind of free rotation of electromagnet, it can't directly to the power frequency ac or only the power supply work, must use the special stepper motor drive; Step and step motor is divided into the whole, half step, subdivided driving mode, the stepper motor step the whole half step what does that mean? Let below small make up for you to explain: there are three basic stepper motor drives the stepper motor drive mode: the step, half step, segmentation. The main difference is that the control precision of the motor coil current (The excitation mode)。 A step in the whole operation of the step, the whole drive, the same kind of stepping motor can match both full/half step drive also can match subdivision driver, but the running effect is different. Stepper motor drive by pulse direction/instruction on the two two phase stepper motor excitation coil cycle (The charging coil set current)Each pulse, this kind of drive mode will make a basic step motor mobile pitch Angle, which is 1. 80 degrees (Standard two-phase motor once a total of 200 steps from the Angle of)。 Second, half step driver when single-phase excitation, step motor shaft stop to the whole position, drive after receiving the next pulse, such as to another phase excitation and keep the original one after another in excitation state, the motor shaft will move from a half step Angle, parked in the middle of the adjacent two whole step position. So cycle to single phase and two phase coil bipolar excitation stepper motor will with each pulse 0. 90 - degree rotation half step way. All full/half step driver steps can perform the whole and half drive, dial the code switch of dial by the driver to choose. Compared to the whole step mode, half step way are twice as high accuracy and the advantages of small vibration during low speed running, so the actual when using the full/half step drive half step is generally selected mode. Three, minimal subdivided driving subdivided driving mode with low speed vibration and two positioning accuracy is high. For sometimes need to run at low speed (The motor shaft and sometimes work in the RPM of 60)Or positioning accuracy is less than 0. 90 degrees of stepping applications, the subdivision type stepping motor drives for a wide range of applications. Its basic principle is to two of the motor coil respectively according to the steps of the sine and cosine shape precision current control, thus making a step away from the Angle of step distance is divided into several segments. Such as drive mode can make the segmentation of 16 step each lap 200 standard stepper motor to achieve each lap 16 = 200 * 3200 steps run precision (Is 0. 1125°)。 Overall: step in the whole running condition, each pulse input, the motor shaft angular displacement is a step torque Angle, in the condition of half step operation, for each pulse input, the motor shaft angular displacement is half step torque Angle. Stepper motor step had better not use the whole state, the state step vibration.
