THANKS!
Yeah, you can see they are hard to keep clean. The x and y are protected with bellows, but get fairly dirty quickly.
When I had the Y axis tore down and no ball screws attached, I could tap the table and send it to the far end.
The machine started life as a CMM, BIG 4' x 4' granite table 9" thick, and the fixed gantry is 3" high, stretches the width, has a 24 1/2" opening for the Y to pass through and is 12" thick.
The guys who delivered it said I weighed 2,750 lbs without the 4x4 steel base