The y-stepper is connected to the flexible coupling. The flexible coupling is connected to the lead screw. Next on the leadscrew are two locking nuts (jam nuts), which provide preload against the bearing.
Alas, my lock nuts are no longer locked - with a flashlight I can see one of them rattling around the coupling, instead of being jammed against its mate. End result is too much backlash.
Can I get to these nuts from the back panel? Or do I need to access them from underneath (ie. lie the 350lb machine on it's back)?
Any help appreciated.