ADEEPT Robotic Arm, Manual

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2.2.2 The working principle of the Servo
The servo mechanism is an automatic control system that enables the object's
position, orientation, state and other output controlled quantities to follow arbitrary
changes in the input target (or given value). The servo mainly depends on Pulsefor
location. Basically, it can be understood that the servo motor receives an impulse and
rotates the angle corresponding to the impulse to realize displacement. Because the
servo motor itself has the function of sending out pulses, the servo motor rotates every
time at an angle, and a corresponding number of pulses will be sent out. In this way,
the pulses received by the servo motor form a response, or a closed loop. In this way,
the system will know how many pulses are sent to the servo motor and how many
pulses are received. In this way, it is possible to precisely control the rotation of the
motor, thereby achieving precise positioning.
Adeept Arm Drive Board sends a PWM signal to a servomotor, which is then
processed by an IC on the circuit board to calculate the rotation direction of the drive
motor, which is then transmitted through a reduction gear to the swing arm. At the
same time, the position detector returns a position signal to determine whether the set
position has been reached or not.