Correlating Difference of .0002 between 2 different Zeiss's

[[Ja...]]

Hello,
My manager just came to me and asked me to find out why our Zeiss Eclipse and Contora G2 are not correlating on the same part.

Both machine are using the same probe size and same module and getting different numbers on the same diameter and the tolerance on the diameter is .0005.

The probe head is brand new on both machines. One machine changed to a medium force module with the same probe and the correlation got worse. I have been asked why the 2 machines are getting different readings on the same part under the same probe conditions.

Thanks

[[Da...]]

Are the programs EXACTLY the same ? Including evaluation settings ? Same filters and OLE ? Is the alignment looped ? Same probe LENGTHS ? Same work holding ? Once you've checked all that , check it again !

Then there's more to go over after that! It's very hard to get two machines to check the same, but .0002 is too much.

[[To...]]

It looks like she is using a Renishaw touch-trigger probe on the Eclipse so filters/outliers don't matter.

Are you scanning on the Contura? I think I would take the program from the Eclipse and load into the Contura, fix the stylus system name if it doesn't match. Make sure the program is still using single points.

If you measure a part, take it off, put it back on the same machine and run the program. Do you get the same results?
If not, looping the alignment should help you there.

Ditto everything else Dave said.