Thank you for your feedback. Responding to your question/feedback below.
*) the motor should be fairly warm but not too hot to touch.
A) Other motors were warm. J3 was hot.
*) is it making a groaning noise and not moving very far?
A) When I first connected J3, it was making a fairly loud hissing sound. Motor wasn't working at all. Other motors J1, J2, J4, J5 seem to be working. Upon checking J3, noticed that one of the pins of the motor wire was bent when I connected it to the JST connector. So, fixed the pin and reconnected. Do you think one or more of the J3 motor coils got burnt inside when I ran it with bent pin?
*) if the drive doesn't sound consistent or is groaning rather than whining evenly then you likely have a wiring issue. only one pair of coils is driving the motor. I would check the JST connectors for bad connection as you may be missing one of the A+A- or B+B- wires.
A) Good question. With all the wiring connections on (except the motor wire connected to JST), I ran connectivity check all the way from the servo drivers to the JST connectors - they connect as shown below, and without any cross connections. Do you think below is correct?
Found wire connectivity as follows -
Driver wire = JST connector (to the J3 motor)
WHITE = BLUE
BLACK = BLACK
RED = RED
GREEN = GREEN
