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Step drive role

Release date:2015-05-14Views:1812

Stepper motor driver is a kind of electrical pulses into angular displacement of the actuator. When the stepper driver receives a pulse signal it will drive a step motor according to set the direction of rotation of a fixed point (called "step angle"), its rotation is in fixed angle step by step operation. Can by controlling the pulse number to control the amount of angular displacement, so as to achieve the purpose of accurate positioning; at the same time can by controlling the pulse frequency to control the motor rotation speed and acceleration, so as to achieve the purpose of speed regulation and positioning. Widely used in engraving machine, crystal grinding machine, middle CNC machine, EEG embroidery machine, packaging machinery, fountains, dispensing machine, cut material feeding system of high resolution of large and medium-sized CNC equipment.

Phase stepper motor refers to the number of the motor coil group, used a two-phase, three-phase, four phase, five phase stepper motor. Number of motor phase are different, the step angle is different, the general two-phase motor step angle is 180 degrees, three-phase 1.2 degrees, five phase of 0.72 degrees. In the absence of subdivision drive, users mainly depends on the number of different phase stepper motor to meet the requirements of step angle. If you use a subdivision driver, the number of phases will become meaningless, users only need to change the fine fraction on the drive, you can change the step angle.

After subdivision driver will be the running performance of the motor have a qualitative leap, but all this is generated by the drive itself, and the motor and control system. When in use, the user only needs to pay attention is the stepper motor step angle changes, the dots on the control system of step signal frequency effect, because subdivision back stepping motor step angle smaller, step into the frequency of the signal to a corresponding increase in. To 1.8 degrees step motor as an example: drive in the half step state step angle is 0.9 degrees, and in ten subdivision step angle for 0.18 degree. This requires that the motor speed is the same, the control system the step into frequency signal in ten segments for half step runs 5 times.

General precision stepper motor step angle of 3~5%. Stepper motor step deviation will not affect the accuracy of the next step, so precision stepper motor is not cumulative.