The control of plc pulse quantity is mostly used for angle control of stepping motor, servo motor, distance control, position control and so on. The following is a stepping motor as an example to illustrate the various control methods.
1. Angle control of stepper motor. First, we must clarify the number of subdivisions of the stepper motor, and then determine the total number of pulses required for the stepper motor to make one revolution. Calculate "angle percentage = set angle / 360 ° (ie one turn)" "number of angular action pulses = total number of pulses per circle * percentage of angle."
The formula is: the number of angular action pulses = the total number of pulses per circle * (set angle / 360 °).
2. Distance control of stepper motor. First, the total number of pulses required for the stepping motor to make one revolution is determined. Then determine the diameter of the stepper motor roller and calculate the circumference of the roller. Calculate the running distance of each pulse. Finally calculate the number of pulses to be run at the set distance.
The formula is: set distance pulse number = set distance / [(roller diameter * 3.14) / total number of pulses per circle]
3. The position control of the stepping motor is the combination of angle control and distance control.
The above is just a simple analysis of the control method of the stepper motor, which may differ from the actual ones, only for reference by colleagues.
The servo motor operates in the same way as the stepper motor, but considers the internal electronic gear ratio of the servo motor and the reduction ratio of the servo motor. Some things are simpler to say, but the actual application is difficult. Please understand the truth in the actual work.
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