tp20 madness!

Don't forget to mash the pins back into the mounting surface of your TP20 modules. If they have worked themselves out it can make for an unreliable connection! 
(yes I am serious) But you should probably look at replacing your module if it has the pins sticking out too far.... In my experience that only happens to modules that nightshift smashes up, and then conveniently forgets to mention until you ask later. (I wish I was making this up) 

But that all being said, if the pins are sticking out to far it causes the module to not fully seat and then rock a bit, which breaks the connection during travel and gives the probe unseated alarm.

We have had people on off shifts break probes at 0,0 going down in Z right into the part, so I am very wary of the pins being properly seated. I should make a tip change counter, but that sounds like a lot of work that needs to be added to every program, and probably overkill.

another thing to note, is your PI200 probe sensor interface box has dip-switches on the back, some of them can be toggled to alter the touch detection delays, debounce mode, and other probe detection parameters.  If you've got two CMM's that you are expecting to be equivalent, you might want to affirm they have the same PI200 parameters for detecting hits.

I had an operator smash a probe so hard he drove the internals through it and broke the magnet on a TP 20. He was immediately banned from CMM use from that point on...lol

I am impressed he wasn't fired, despite that probably being an budget cost for most companies. We have pretty high leniency here when it comes to probe tips, not sure how they feel about modules, or even entire probe heads. Don't wanna find out.