Position of threaded holes are off

It has been a while since programming and this might be a simple fix.

I am trying to measure the true position of many treated hotels and it is giving me bad data. All the positions seem to be shifted to one side toward Dat B. I don't believe what it is telling me because I have checked with a hight gauge and caliper and everything should be very close to nominal.All other areas that are getting measured seem accurate except the holes so I was wondering if there might be some weird setting accidentally turned on that is calculating the holes in a nonstandard way. Could be something else that's just what came to mind thanks for the help.
Here is some extra info.

Have tried auto-feature circles and cylinders as well as constructing a circle

Yes I am using pitch

The probe tip was just calibrated

Everything is measured in Tip A0B0

2mm ball is not hitting shank

Showing out of tolerance by about 0.1mm

0 louisd 6 months ago

Is the part physically symmetrical? Maybe rotate it 180 degrees and try again?! sometimes it's that simple of a resolution lol.

Another simple resolve is to make sure the pitch is matching thread direction. you've got the circle COUNTER CLOCKWISE (CCW), with a positive value of pitch.

Otherwise please post code and we can help more.
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0 DeWain Hodge 6 months ago

When I measure threaded holes I always select MAX_INSC. It seems to help with both the location and diameter of the holes.
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0 Calvin Korver 6 months ago in reply to louisd

No, it is not symmetrical, I just made that drawing to show that it was very simple with the datums and the holes I was having problems with I will change the threads to the right direction, but that isn't where my problem is coming from. When you say post the code do you mean an example of a circle from the edit window? It is a pretty long program.
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0 austin vanbenschoten 6 months ago

Only thing I would add is using a spherical stylus. It takes having the equator of the stylus and the crest of the threads meeting, out of the equation.
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0 Neil Challinor 6 months ago in reply to austin vanbenschoten

These kind of styli are intended for sheet-metal applications where very thin edges need to be probed. For a threaded hole, the stylus would need to be perfectly orientated to the hole to avoid introducing measurement error...
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