Qualification after drives off

[[Pa...]]

Accura and Accura2, VAST Gold in each

My company requires qualification of all styli after drives off, whether it happened due to a collision or a holiday weekend shutdown.  I've felt for a long time that this is unnecessary, particularly in the intentional shutdown scenario. What would change about a stylus or a stylus system (relative to the Master Stylus) during a shutdown?  I've got a couple machines; each has a rack with 21 systems.  They're all very different from one another, meaning I need to use 3 different sphere sizes in a total of 7 positions.  A full qualification of both machines takes just under 3 hours.  This past holiday the pain of lost hours was great enough I think I'm poised to make a change here.

I'd happily verify a couple and get back to work in 15 minutes if there were no findings.

Google's AI bot says there's no reason.  I believe him, but I don't trust him 😉

What do you guys think?

[[Ma...]]

I would calibrate right after crash just that probe system and then regularly, depending on your usage.

You can get into situation, where you have a collision which is not a collision, just a probe which ran into a void.
There is no need to do such calibration after drives are off - they can shut down to conserve air consumption every 15 minutes of inactivity - that would be hilarious to do calibration in this case.

I am running calibration program, which measure before calibration and then after calibration - this can tell you if you have a problem with specific probe ( lose screw and so on )