We have a new Dobot Magician, but Joint 4 does not respond in dobot studio.
When we turn on the arm, it spins for 5-10 seconds, and we have to quickly move the arm out of the way so it doesn't collide with anything. After that it doesn't respond at all.
It is plugged into GP3/Port 1 (lowest on the arm, near the button).
What should I try?