Hi,
after a long time of stop (1-2 months), i’ve powered on my uarm.
It now trembles, both when stopped and during movements.
It seems like all the steppers oscillante around a position.
I notice that powering on it, when it is far from the zero rotation position, the initial movement of rotation is discontinuous, and not always it succeed in recover the correct rotational zero position.
Sometimes, during the reaching of a position, it loses tension and I see the arm fall down. Then the arm returns quickly up and completes the movement.
What can it be happened?
Thanks.