What is smart servo ?

What is smart servo ?

The definition of  smart servo on this site must include the following functions :
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What is the PLS position unit?

What is the PLS position unit?

The PLS unit is based on the resolution of the encoder. Take Delta A2 servo as an example. Although the resolution of the encoder is 17 bits/rev or 20 bits/rev, the PLS units are all set to 1280000 PLS/rev, which cannot be changed by the user. That is, when the electronic gear ratio is set to 1:1, the driver must receive 1280000 pulses then the motor will make one revolution.Due to the high resolution, the PLS unit is suitable for inner motor control of servo drives. However, in the motion control system, an absolute coordinate system must be established. If PLS is used as the position unit, neither the command nor the feedback is suitable, the reason is as follows :

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