Positional tolerance for thread

Hello!
Could you tell me please how do you measure positional tolerance for thread?
The idea of measuring spirally less and less do i like because for my experience big different measuring between threaded hole and without.
Using cilindre prob good idia for circule, but for cilindre i am not sure that surfece of cilindre prob can correctly measuring points.
How do you measure?)

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mrollings53 11 months ago

I measure a cylinder and specify a pitch. The pitch equals the thread pitch in whatever units the routine is in. I dimension position only and ignore material modifiers. You can add 3 sample hits to make sure you are always probing the same points in the thread.

If I had an analog scanning probe I would create an adaptive cylinder spiral scan, pitch is the same as the TTP setting.
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mrollings53 11 months ago

I measure a cylinder and specify a pitch. The pitch equals the thread pitch in whatever units the routine is in. I dimension position only and ignore material modifiers. You can add 3 sample hits to make sure you are always probing the same points in the thread.

If I had an analog scanning probe I would create an adaptive cylinder spiral scan, pitch is the same as the TTP setting.
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