I have a late model 2006 PRT Alpha. My Z has about 1/16" vertical play which I can cause with little effort. Based on others posts I've read, I'm guessing that it may be a loose pinion gear. None of the other pinions have any appreciable wear so, again I'm guessing, it seems that pinion wear is less likely. Either way, I need to get in there, assuming this is a good place to start my troubleshooting.
Where I need advise is how best to access the Z pinion as I'm not seeing a simple way. Do I maybe need to run the gantry out past the stops to a point where I can drop the tracked router mounting plate (not sure what it's called) far enough down past the table to get at the pinion inside the Z assembly and, if yes, is there some sort of stop that must be defeated to then drop it that far?
Thanks kindly, Gerry