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Role stepper drives

Date:2015-07-09    Read:[ ] 次

 Stepper motor drive is a pulse can be converted into electrical angular displacement of the actuator. When the stepper motor driver receives a pulse signal, which is drive a stepper motor to rotate in the direction of setting a fixed angle (referred to as "step angle"), its approach is based on a fixed rotation angle step by step operation.It can thus be controlled by controlling the number of pulses in an amount of angular displacement, so as to achieve the purpose of precise positioning; the same time we can also thereby to control the motor rotation speed and acceleration by controlling the pulse frequency to achieve the speed and positioning purposes. Widely used in high-resolution large and medium-sized CNC equipment engraving machine, crystal polishing machine, medium-sized CNC machine tools, EEG embroidery machines, packaging machinery, fountains, dispenser, cutting material feeding system.

  Phase stepper motor is the number of coil groups inside the motor, commonly used two-phase, three-phase, four-phase, five-phase stepper motor. Several different motor phase, step angle is different, generally a two-phase motor step angle of 1.8 degrees to 1.2 degrees of three-phase, five-phase was 0.72 degrees. In the case of sub-drive is not installed, the user mainly by selecting a different number of phases of the stepper motor step angle to meet the requirements. If you use the sub-drive, the number of phases will become meaningless, users simply change the number of segments on the drive, you can change the step angle.
  Drive subdivision after the operating performance of the motor to produce a qualitative leap, but all this is generated by the drive itself, and motor and control system independent. In use, the user only caveat that is to change the stepper motor step angle, frequency control system that will send a signal of stepping influential, because after the breakdown of stepper motor step angle will change small, requires stepped frequency signal to be increased accordingly. 1.8 degree stepper motor, for example: when the half-step drive state step angle of 0.9 degrees, while in ten segments during step angle of 0.18 degrees, so at the request of the same motor speed, the control system issued stepped frequency signal is subdivided in ten five times when half step runtime.
The general accuracy of the stepper motor step angle is 3 to 5%. Deviation stepper motor single step will not affect the next step accuracy, precision stepper motor does not accumulate.