Does anyone know if the Z screw drive needs to be lubricated?
Yes…it definitely does. Mine was making a terrible squealing sound. All along I thought it was coming from the other lead screws and kept lubricating them without success. Finally shot the Z-screw and it was eliminated.
Doesn’t take much. (silicone spray is best but don’t get it on the electrical contacts). You can also use 3-in-1 or sewing machine oil but they will attract dirt/debris.
@Andrias I soak all the moving points of pro before I begin a session with WD-40 silicone spray.
WORD TO THE WISE !!!
do not spray lube on the couplers IMO this is one of top reasons behind coupler slip.
I’m not sure what’s the IMO couplers, is it the electrical contacts for the IHS ?
Sorry I had the Pro on my mind.
in my opinion