[Ken_Shea]

Ken,

Some ideas, most/all of which you've undoubtedly done:

- no stray correction value left in the Wear column of an offset?
- what are you using for CAM? Any chance there is a wear correction somewhere that hasn't been cleared?
- the end mill you grabbed is definitely the diameter you think it is?

Is the error "consistent" from part to part? (can you cut multiple simple parts of identical dimensions and see if they are all exactly the same)? Maybe even cut them in the center, then on one end of the travel/table?

AFA: the .0015" of deflection when you push on the table -- remember it's a long ways around from the indictor to the table! (indicator, through the spindle mount, up the Z column, through the entire machine, back up through the bed all the way to the casing that supports the locating end of the ball screw(s). As HFO_tech said: if it springs back, you're good!

PM

Yes, had dbl checked for wear offset in CAM and tool registry, tool diameter measured and definetly the correct end mill, you were correct in asking though because it is these simple things over looked that get you so often.

Not sure on the consistency of the error over several parts, need to check and see.

Checked the level, it is out substantially in Y and less in X but still out. That will be the next thing corrected before continuing, then I can check from part to part.

Thanks for the input.