Dirty "Y" Rails???

[ktjwilliams]

Glad that you figured it out and all is good again ...

[SAA3840]

Well, my "Y" rails are apparently dirty again. I put a 4hr 13min carve project on the machine. The project consisted of four separate carves, one each for each side of a box I'm trying to make. Three "sides" carved just fine, on the last one, I got the dirty "Y" rails message. I checked the rails and they were quite clean. I started the machine back up and the machine forgot where it was and carved all the way to the edge of the board. The last (4th) side was a square carve region, 3/8" deep with an elephant within. 3/4 of the elephant was done when the error message came up.
Any new ideas??

[fwharris]

I could also be one or more of the Y bearings.

[SAA3840]

I could also be one or more of the Y bearings.

I did check them, BUT I've got some ordered so being as how that's just about the last thing anyone can think of, I'm thinking I'll just replace all four "Y" bearings just to be sure. (As soon as they get here, of course.)
Thanks