Oscilloscope analysis of the noise
induced in rc servo control/power signal

   I started investigating this problem after I observed small vibrations (jerking) in the servo arm when load was applied. So started to analyze with my oscilloscope (an SDS 200A digital) what was happening. The result of these measuring can be seen bellow. The are multiple causes for this noise, anywhere from your power supply, bad wiring to your controller (as it was in my case).
Servo control signal measured in two different positions.
Servo Signal position one
Servo Signal position two
Servo control signal noise with and without load applied.
Servo Signal with no noise
Servo Signal with noise
Servo power line noise measured first with no load then with increased load.
Servo power with no load
Servo with little load
Servo power with full load

Main-> Work-> Robotics