i have a problem with a linear rail which fixed with a robot BA006L as 7th axis.
it was working fine , but after 2 years, the rail is moving to incorrect positions.
the main issue that the rail is missing the position only after switching off the controller . but the robot arm is not missing the position , because of that i dont think it's a battery issue.
ex: today the zero of the rail was correct and everything is ok, switch off the controller and come back tomorrow, you will see that the rails is not going back to its zero reference while the values of the encoder are correct.
some times it shifts 3 mm, sometime 20 mm, the last shift was 70 mm which is too much.
i also check the motor shaft with the gearbox, they are connected and there are a key on the shaft, so i dont believe there is a slipping between the motor and gearbox.
any idea please from your experience .