I'm looking for suggestions for how to keep round parts consistently clocked.

When I have a round part with a hole used for Align, the fixture will usually keep the origin consistent from part to part, but the Alignment (clocking) has to be done by eye.

For example, I have a barrel with a hole (datum C) that forms the Z axis with the center of the part.  that line should be 90 deg  with the table.  If the operator (or me) puts the part in the fixture so its 85 degrees with the table that can cause problems.  For example, a point on the bottom of the barrel is now on the opposite of the part as the probe.  Or a hole in the side that was at 45 degrees, so the probe is at 45 degees is now at 40 degrees and it shanks out.

On other programs I've had the probe go to where the clocking hole is "supposed" to be and instructed the operator to rotate the part in the fixture so it lines up with the probe.  CMM Manager, though, updates the probe position each time the program is run (or works off the last part alignment) so that instead of keeping the clocking hole 90 degrees from the table, with each run the part gets more out of whack.

This is a great feature when, for example, I have the probe move to the front of the part at the start of a program and then move the fixture to a different part of the table.  During the next run it moves to the front of the new location of the part.

This is just an example of when I would like to shut it off (or come with a better way to fixture the part).