I would like to get some opinions on Tru-pos locators. These are the tapered style that have a no/go thread at the end so it only locates on the thread.
1. is it better practice to project the cylinder back to the surface and report out that circle? Or is Tp perpendicular to centerline using the cylinder better? (I use legacy)
I like perpendicular to centerline method because we measure a lot of parts that are on spherical or conical surfaces. It just seems to add a unnecessary chance on error.
As far as surfaces that are flat and perpendicular I still use the same method.
2. I actually have had good success with checking threaded holes using pitch. But…. What I don’t like is the chance of the probe picking up a chip off of the inside of the thread. Potentially throwing other surfaces or holes to be off.
So, if money wasn’t an object as far as buying tru-pos. What do you all like as far as accuracy?
Increasing the number of hits is probably the biggest thing that you can do. After experimenting with different values, I've found that using a minimum of 13 hits comes pretty close to using a plug. Make sure that the tip diameter is greater than the thread pitch.