I recently bought 20 of the “High-Torque Servos with Metal Gears (Generic).” The servos seem to be built well, except…
The PID circuit seems to not work. I hooked up a few of the servos to a Micro Maestro 6-Channel USB Servo Controller (which I have successfully used to control other servos), and the servos seem to respond roughly once every second (rather than constantly holding their position).
More specifically, I think the behavior is this: once the servos reach their commanded position, they seem to “turn off” for roughly a second and then they come back on. I am powering them with a 5V 2A power supply, so I don’t think current draw is a problem.
Are the servos broken? I have had no trouble using other servos in the past, and I know the controller works. Thanks!