Hi All,
The lead screw for the Z axis is not secured in what looks to be a little cylindrical hollow protrusion, similar to what I assume is the linear slide rails bearing blocks. I don’t know how long it’s been this way but I have a feeling it is affecting my prints.
Does anyone know how this end is retained; is it simply held in place by the bearing on the other end? Anyone experience this problem?
Thanks!
Can you post a picture? Might get more responses. I’m not sure I understand what you are saying.
Post a picture and we can compare to my machine.
Actually, that bearing at the top of the z lead screw was a mistake added by FlashForge to the MakerBot design. MakerBot actually got that one right. The X&Y registration of the bed is held in place by the smooth rods. Binding the top of the lead screw just means that more lateral force from the wobble of the lead screw is transferred to the build plate that the smooth rods have to resist. Removing that bearing from the top is often the solution to a rough surface. So if you got one with the bearing removed already, that’s good. Don’t “fix” it, because you’ll break it.
The thing that needs to be secure is the motor to the bottom. That’s what keeps the vertical position accurate.
So to review, you want the lead screw to be able to freely move in the X and Y direction, but not in the Z direction.
