If a simple method is used to adjust the direction of rotation of the two phase stepper motor after power on?
The 5. phase current "smooth" is not precise control of motor, but the current rate of change is slow, so it does not have a "smooth" step, and the breakdown of Microstepping can be used for precise positioning.16. when the phase current of the motor is smoothed, it will lead to the decrease of the motor torque, and the subdivision control will not cause the decrease of the motor torque, but the torque will increase.
In foreign countries, two phase hybrid stepping motor and corresponding subdivision driver are mainly used in stepping system. But in China, the majority of users of "segmentation" is not particularly understand, just think, in order to improve the accuracy of segmentation is, in fact, is mainly to improve the performance of motor operating segments, is as follows: the breakdown of stepper motor control by the drive control phase current stepper motor to realize, in the second phase motor as an example, if the motor rated current is 3A, if we use a conventional drive (such as the commonly used constant current chopping) the motor drive motor, each operation step, the current in the winding will be from 0 to 3A or 3A mutation mutation from to 0, great changes of the phase current, will cause vibration and the noise of motor operation. If the use of sub drive, the motor drive in the 10 segments of the state, every operation of a micro motor, the winding current change of only 0.3A rather than 3A, and the current is a sine curve changes, thus greatly improve the vibration and noise of motor, therefore, the advantages in performance is the real the advantage of subdivision. Due to the precise control of the phase current of the motor, the driver must have high technical requirements and technical requirements, and the cost will be higher. Attention, some domestic drives use "smooth" to replace subdivision, and some also known as "subdivision", but this is not a true segmentation, and hope that the majority of users must distinguish the essence of the difference between the two:
Just switch the motor to the A+ and A- (or B+ and B-) of the drive line.The subdivision principle of drive and some related instructions
