Lower level matrix

[UKCHAMP]

Do I do the lower level matrix first, before I qualify any of the styli?

[BKulpa]

Depends on the situation.
Was the machine just calibrated by Hexagon? (Technician performing the calibration should have done this before they left you)
Did you suffer a crash?
New install?
Changed probe head?
If you answer yes to any of these questions, yes.

[JEFMAN]

You have to perform it with your master probe, reset to theo and saying yes the sphere moved (yes dcc can be enough).

[anthony.alfaro]

to answer your question literally, yes.

to answer the overriding question: you should only be doing the lower matrix in certain situations. You should not be doing a lower matrix just willy nilly before each probe cal.

[sealevel]

You have to perform it with your master probe, reset to theo and saying yes the sphere moved (yes dcc can be enough).

I concur! And to add.... (IMHO) your Master should be a tough sergeant for your probe privates/pawns........ use a 5MM x 20MM or similar.
Hopefully, that's one stiff hombre' to show lead with SD on the ceramic Einstein for the rest of them wet noodle probe configurations!

[BKulpa]

I think we need to know the probing system before recommending a stylus!
Some systems require a predetermined stylus for the lower matrix calibration.

What probing system do you have UKCHAMP?
Tell us a little more about your machine, so the best advise can be offered.

[UKCHAMP]

Probing system is a HP-S-X1C, on a 443 dual z Optiv.

[JEFMAN]

Probing system is a HP-S-X1C, on a 443 dual z Optiv.

As sealevel said above, use a Ø5L20, it should be the best tip to perform the lower matrix.