Why Is My Machine Erring????

A) share code using code tags (swapped the number 0 for the letter o that should be used in the tags)
[C0DE]
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B) Did you modify something about a datum plane that would have caused you a .3" offset?
C) Are you utilizing avoidance moves in auto-features?

complete blind guesses:

is void detection on? It does some weird things to me on compound angle holes.

Is your starting offset and ending offset correct? If I do a DEEP hole where I have to not check the last inch due to short stylus, next hole I go to, it has hits outside the actual part based on remembering the ending offset previously used, I set that back to .04/.04 and hits are golden.

Did someone at some point get the popup about no hole do you want to read machine's location, the location happened to be .300 above the part, god knows why, when they clicked yes, then asked if you want to remember that forever they clicked yes again, so your TARG XYZ are not actually IN the hole?

Weird vector with weird start/end values AND "FIND HOLE" is turned on, so it "thinks" it is IN the hole .300 above and is looking for the hole BEFORE going to your actual hits?

I got everything to work as it should...i dont know what the issue was. Just feel really dumb because the part is simple and it took me all damn day to get it and it still needs some tweaking. I restarted everything and it was ok. I use a sheffield? Discovery cmm. Its 15 years old and it does some goofy stuff. At times it will not manually travel in the positive axis only the negative...and everything has to be restarted. The iffiest cmm i have ever used.

Anyway, thanks for all the insight for future head scratchers.

i would suspect your tach on the motors rotor is getting worn out. id look into taking the cap off it and look to see if it needs replaced, cleaned or serviced.
but then again i could be totally wrong.