Z Axis

[dickdelmi]

I know that this subject has been discussed before but I want to warn everyone about a loose "Z Axis".
I just removed the cover for the stepper motor and found that the coupling was about half disengaged.  The bottom half appeared to be loose so I pushed it back up and tightened the set screw on both halves.  I hope that this is the correct procedure, leaving a gap between the coupling and the bearing housing?  Can anybody confirm this?  I am currently running a four hour job and it seems to be OK. 

[stevem]

The coupling should be centered between the stepper motor and the shaft it's mounted to. Make sure those set screws are tight. Additionally, tighten the set screws on the Y and X axis. Mine were not tight when I got the machine. After that all should be good.

[dickdelmi]

Thanks Steve!