A1 Z motor not holding height when printing or static not printing

Bambu Lab A Series Troubleshooting
1

I have developed a problem with one of A1’s. I have noticed that the z hight when its resting is always sitting on the bed when I walk by. Several times the head has been below the bed and it fries to move it along the X axis and runs into the bed. During a longer print now height wise its happened twice the Z height does not stick and the hot end ends up colliding with the print and dragging along the top. I believe the stepper motor has become weak. Has anyone else seen this.

I am going to open a ticket tomorrow about it but in the meantime I have downed this printer which sucks as I really need it right now. Isn’t that Murphy’s law.

2

In old printers (like reprap era, 10 years ago) it was never the motor but the controller what was the culprit in cases like this. There was a potentiometer where you could increase the voltage for the steppers (increasing their temp, fixing the issue, if the components werent totally dead) but I am not sure if all of this applies on the A1

3

yea agree not quite sure will submit a ticket today and see what they say

4

Hey @kmanning2317 did you get a resolution for this at all? I am having the same issue, doesn’t seem quite as bad as what you were having but it might get worse.