Ballscrew snapped? What else?
Nah, it just wound the screw all the way out of the nut and deposited all those little bearings in 6 years of accumulated swarf and muck under the table.. I think I recovered them all.. :-(
You can see in that pic that I've already tapped the end of the screw to take an M8 bolt, that'll hold a plate that will stall the stepper if I try the same trick again...
It took 5 minutes to drill and tap that screw. It'll be an hour or so to rebuild the screw and reinstall it....
How does it go? " No one has time to do anything properly, but we all have time to do it twice!"