Stepper motor has no encoder
There is no encoder for the stepper motor. If you want to add an encoder to the stepper motor, you can step the motor with a double shaft extension and add an encoder to the rear shaft.
The stepper motor is the original, the encoder belongs to the feedback system, the encoder is used with the stepper motor, and the PLC is used to control its operation. According to the principle, the PLC sends a pulse command to the stepper driver. The driver supplies the stepper motor with corresponding current to operate. When the encoder detects that the stepper motor runs to the position that needs to be reached, it will feed back the signal to the PLC. The feedback signal stops sending the pulse signal to the stepper driver. When the stepper motor does not have the electric original supply current, it will stop running immediately. (The servo motor is such a device). In fact, the encoder will continuously feed back the current position to the PLC. The PLC compares the feedback value with the target value to adjust the angle of the rotor rotation.
Of course, will it stop? After stopping, is it the position you want? Does this depend on the motor? Of course, if the speed is running at a low speed, the general feed accuracy can be satisfied.
Another is to calculate the number of pulses required for the stepper motor feed in advance, and then use PLC programming, run so many pulse numbers, the stepper motor stops, the encoder feedbacks the motor position at this time, forming a semi-closed loop control. In addition to the high-speed positioning, the PLC program can set the motor to decelerate and feed when it is approaching the position, which can meet the positioning accuracy.
If you want to buy a power tool motor, please pay attention to Printer Dc Motor
