(1)Stepper Angle and static interval error of stepper motor step Angle & alpha; Shi6 decide important parameters of the pulse equivalent, open loop servo system of nc machine tools in the common reactive stepper motor step Angle is commonly 0. 5°~3°, in general, step away from the smaller the Angle, the higher the precision. Static interval error refers to the theory of the step Angle and interval Angle, the difference between the actual in points, said is in commonly 10 & prime; Within. Step away from the pitch error is mainly composed of stepping motor manufacturing error, uneven air gap between stator and rotor, and factors such as uneven electromagnetic torque of each phase. Step distance error directly affect the machining accuracy is carried out and the dynamic behavior of the stepper motor.
(2)Start frequency fq. Light, step motor by static suddenly started, and into the don't throw step allows the proper functioning of the highest frequency, is called start frequency or kick, with fq said. If the startup frequency is greater than the kick, stepper motor can't start properly. Fq related to load inertia, generally along with the increase of load inertia. No-load startup, stepper motor stator winding current state frequency relay, not higher than the frequency of change.
(3)Continuous operation of the highest working frequency fmax stepper motor run continuously, it can accept, guarantee the limit frequency of not losing step run fmax, known as the highest operating frequency. It is decided to the parameters of the stator winding current state the highest frequency, it determines the maximum speed of stepper motor. Its value is greater than fq, and vary with the nature of the load and size, also has a lot to do with driving power supply.
(4)Deceleration characteristics of stepper motor and deceleration feature are described not skills from static to the working frequency of the motor and the working frequency to the stillness of the deceleration process, the change of the stator winding current state the relationship between frequency and time. When stepping motor start to outweigh the sudden jump frequency stops working frequency, the change speed must decline gradually. Gradually rising and falling of acceleration time, deceleration time is not too small, otherwise there will be a step or steps. We used to accelerate the time constant of Ta and Tb to describe the rise of the stepping motor speed and speed characteristic,
(5)From the frequency characteristics and dynamic torque from the frequency characteristics of M = F (f)Is to describe the continuous and stable operation of the stepping motor output torque and the relationship between the frequency of continuous running.
