I purchased a TAZ6 about 2 years ago. After about 12 months, the movement in the Y axis was unreliable, so I replaced the controller card, which fixed the problem.
Now, about another 12 months later, the Z axiz is unreliable. It will move, but then just make a buzzing sound and stop.
Are these machines inherently unreliable. I am only using it from time to time, so it is not overworked.