Within the span of a month of owning V5, I have had two motors give me problems. They start to have a weird behavior with the cortex (not just the program we’re running, but system wide) where the cortex recognizes the motor, but under no means will it move unless by human force. It will not work with my program, or in the “Devices” menu. If I tap an arrow to move it via the cortex, it does absolutely nothing. The next thing I noticed is that they both make a funky noise. They have this really “tinny”? noise when rotating a shaft, and after opening the motor up, I noticed that the internal motors rattle. I thought this was weird and shook a never-used motor, and it did not have the same “rattle” noise.
The first attached video is a comparison between a good then the bad motor. (May need headphones in order to distinguish a difference) and the second is a demonstration of the “rattle” noise.