stepper motor speed of step motor control is very simple, in theory, only need to drive the pulse signal, each to drive a CP pulse, stepper motor is a step away from the Angle of rotation (Segmentation for a subdivision step Angle), that is to say, always follow the change of the CP pulse stepper motor. But in fact, if the CP signal change quickly, stepper motor due to the inertia will follow the change of the electrical signals, then can produce step locked-rotor and lost phenomenon. So the step motor at startup, there must be acc process; Must have a slow process, when stop generally acc and slow down the process rule is the same, the following up, for example. acc process consists of sudden jump frequency higher speed curve (Slow down process instead)。 Sudden jump frequency refers to the stepper motor in the stationary state when suddenly imposed by pulse start frequency, the frequency is too big, otherwise also can produce locked-rotor and step. Speed curve is commonly index curve or after repairing the exponential curve, of course, also can use a straight line or parabola, etc. Users need to be according to your own load relay, selecting the appropriate frequency and speed curve, it is not easy to find a ideal curve, generally require multiple & lsquo; Commissioning & rsquo; To just go. Index curve in the actual software programming more troublesome, general in advance good time constant storage in a computer memory, direct selection in the course of work. the stepper motor speed from the main workload of design for the control software, the design level will directly affect the stability and speed of motor running speed, motor running sound, highest speed, positioning accuracy. Is a special case: the operation of the stepping motor speed is less than sudden jump frequency, speed problems at this time will not.
