When the PLC performs the origin reset of the servo motor, which reset methods have higher repeating positioning accuracy?
The repeating accuracy of the S-step approaching origin return method is very high. In addition, your origin sensor is best to use optical fiber. Ordinary photoelectric switches are difficult to satisfy. The accuracy depends on the lead accuracy of your screw and the gear ratio of servo or stepping. If you want to give feedback, Servo Motor the encoder is not needed, just feedback the encoder from the servo.
The return-to-origin mode of the servo motor is superior to the stepper motor. Because the servo motor has feedback detection, it can perform the return-to-origin positioning with high repeat accuracy. However,Servo Motor the cumulative offset will gradually occur after the servo motor enters the operating cycle. When the offset error exceeds the allowable range, the origin must be reset again to reset the error to zero.
How often to perform a return to origin should depend on the use. Most of the servo motors do not need to perform home position return during the running cycle, and only perform home position return when the system is turned on. However, when the system is disturbed, Servo Motor the offset error may be very obvious and even unusable. At this time, it is necessary to prevent the occurrence of interference before the system can continue to use.