Tonight I went down to flip my stock after running a rough cut and then a finish cut. When I got to the machine I noticed the finish cut went bad. I just assumed a motor stalled. I jogged the axis' to see which stalled and found none of them did. Looking at the part, I noticed that the Y axis was off about an inch. I thought I must have zero'ed it wrong. Okay, I cut a new piece of stock, viced it up and started to jog the tables to begin a new piece.
Thats when I noticed that the Y axis table stopped somewhere mid screw. Funny thing was the table wasn't moving but the screw was spinning!
I removed the Y motor and pulled out the table to check the brass splitnut.
It was intact but there was play in it so I tighted it down and reinstalled the table and motor. Works fine again but for the life of me I cant figure that one out. Anyone else seen this before?
How could the lead screw turn inside the split nut WITHOUT moving the table?
It was running all day without issue till this occured.