Questions about the servo zero switch

The change of the method has a lot of kinds,according to the requirements of precision and actual

requirements to select.Could finish (some brand servo motor servo motor itself has a full back to the

origin function),also can through the PC to complete servo,But back to the origin of the principle of

generator rotor and stator common basically has the following several kinds.One,to find the origin of the servo motor,when touching the origin switch,slowing down to stop immediately,to point to the origin.Second,back to the origin directly for encoder The Z believe,when have Z believe that number,slowing down to stop immediately.This method only commonly used in the back to the original axis of rotation,and back to the original speed is not high,the precision is not high also.The installation of the synchronous belt has a great influence on the servo positioning also? This situation,to know whether the servo tuning very soft? Common servo is controlled by pulse,so,the proportion of the position loop gain,speed loop proportional gain,integral time constant,respectively is how much? Proportion of

position loop gain: 21 percentage gain in rad/s speed loop: 105 rad/s speed loop integral time

constant: 84 ms three control modes of the servo There are three kinds of electricalmotor1.blogspot.com general servo control mode: speed control mode,the torque control mode,the position control mode.Want to know is that these three kinds of control mode according to specific what to choose? Speed control and torque control are using analog control.Pulse to control the position control is through the hair.Specific controlled by what way according to the requirements of customers,meet what kind of movement function to choose.If you didn't ask for motor speed,position,as long as a constant torque output,of course is to use the torque mode.If the position and velocity accuracy to a certain extent,and the real-time torque is not very care about,With torque model is not very convenient,with the speed or position mode is better.If the host controller has better closed-loop control functions,with a speed control effect will be better.If the request is not high,or,Almost no real time request,in position control mode has no high demands on upper controller.In the context of the response speed of the servo driver,computation of minimum torque mode,drive the fastest response to control signals;Location model computation,pumps drive the slowest response to control signals.The dynamic performance of sports have higher requirements,the need to adjust motor in real time.So if the controller itself operation speed is slow (such as PLC,or the low end of the motion controller),with the position control method.If the controller operation speed is faster,you can use speed,the position loop from the driver moved to the controller,reduce the workload of the drive,Efficiency (for example,in the most high-end motion controller);If there is a better host controller,can also use the torque mode control,the speed loop also remove in the drive,it generally only high-end dedicated controller to do that,And when does not need to use the servo motor.