Stepper motor stepper motor can only be run by digital signal control, when pulse provided to the driver, in too short time, the number of pulses control system announced too much, also is the pulse frequency is too high, will lead to plugging a stepping motor. To solve this problem, it is necessary to adopt the deceleration. Is to say, when in stepper motor start, to gradually increase the pulse frequency, pulse frequency demand gradually slowing. This is what we call the & other; Deceleration & throughout; Methods. Stepper motor speed is based on the change of the input pulse signal to change, in theory, to drive a pulse, stepper motor is a step away from the Angle of rotation (Segmentation for a subdivision step Angle)。 In fact, if the pulse signal change too fast, stepper motor due to the effect of damping of the internal counter electromotive force, between the rotor and stator magnetic response will follow the change of electrical signals, will lead to the blocked and steps. So the stepper motor in high speed startup, demand using pulse frequency up to also have to slow down the process when suspension, to ensure to complete the step motor precision positioning control. Speed up and slow down the principle is the same. To speed up the instance, speed up the process is: by root frequency (Below the step-motor direct starting the highest frequency)To jump frequency (Gradually speed up the frequency)To speed up the curve (Slow down process instead)。 Jump frequency refers to the stepper motor in life gradually increase the frequency of frequency, this frequency is not too big, otherwise it will produce locked-rotor and step. Deceleration curve is commonly index curve or after repairing the exponential curve, of course, also can use a straight line or sine curve, etc. Using the MCU or PLC, to be able to complete the deceleration control. Demand for different load and speed, the warp and woof of selecting suitable frequency and jump frequency, to achieve the best control effect. Exponential curve, in software programming, good first time constant of storage in a computer memory, to select when working. Generally, complete the stepper motor deceleration time for more than 300 ms. If using the deceleration time is too short, for the vast majority of the stepper motor, would be hard to complete stepper motor at high speed.
