I’m sure this must be documented somewhere. Because there are 2 motors and 1 could be turned without the other when the power isn’t on.
What is the best way to align or check the alignment of the Z axis?
Certainly, you could adjust the bed leveling to account for an offset in one side or the other, but I’d prefer to be square to start with.
Can the shipping tabs be used, is there a reference point that can be used to adjust both motors to create a square relationship to something with the z axis?
Also while on this topic… I’ve noticed that when the Z axis is down close to the bed that there is a tendency for the screw shafts on the Z motors to have not be straight. Let me explain. When you home if you have the Z axis up off the bed a good ways, you’ll see at the tip of the threaded rod, that it will not be straight as it turns, it will have a wobble to it this wobble is much more pronounced when the head is down towards the bed, and less pronounced when it’s up off the bed. As you might image, the threaded part that is tracking that rod is dampening the wobble the closer it gets to the end. I would expect that this wobble will show as a slight offset in the X or Y axis as the Z axis moved up and down…
To see this, all you have to do is home the Z axis, then watch the tip of the threaded rod on both sides and move the Z axis via rapid movements up a few inches and then hit the home Z again… you’ll immediately see what I’m talking about.
Maybe I’m just used to .00001" tolerances on CNC equipment as those equipment have support on both ends of any threaded movement devices.
Anyway, figured I’d ask.