The USB to serial converter, maybe a bit tricky. If you have a windows 8 operating system, I'd avoid getting one from Gigaware. The chipset they use is not compatible. If you use windows 7 or under, then it is fine. You may want to look around for different vendors.
What we are looking for is the behavior of the motor when in operation. We are looking for a normal behavior and an abnormal behavior with the motor output. Providing us those logs will let us see that.