I'm trying to find some youtube videos which are showing robot arms with some malfunction in it. The problem is, that the keyword is unclear. Should i search for “unstable”, “tremble”, “jerking” or “vibrate” as additional word?
I'm sure, that especially lowcost robot arms have often this kind of behavior. If the mechanic contains only of cheap plastic and the servo motor isn't accurate, the construction will result into an underactuated system which is difficult to control. But i like this behavior, because this provides the challenge to develop a motion controller which can overcome the issue with software.
Are any example videos available, in which the robot arm is quite inaccurate and makes it hard to position the endeffector to the target?