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What model of servo are you using?
Describe your control environment. This includes the controller or interface, and any power source.
The below figure shows my environment to measure the current of MX-28.
Specify the operating mode for applicable models, and any firmware settings you are using.
I am using the latest Mx28 2.0 firmware and the operating mode was PWM control mode but the torque was off.
Include pictures if possible.
Include a full description of the issue.
The above figure is the idle current that I measured and there is an almost 5 sec period of fluctuation. I measured the current of MX-28 through serial communication with Arduino Uno and INA 219 and the MX-28 was communicated with PC every 8 msec. The MX-28 's torque was off and there was no external force or torque on the MX-28.
If possible, could you kindly let me know why there is a long-term idle current fluctuation?