That's the email I got upon entering the shop today. I was using a 1 x 10 styli for a part with 3-48 & 6-32 threaded holes. Just trying to get a decent location within tolerance of +/- .005. Now, the customer (we are the sub-contractor) is "coming in today with a cylindrical probe which will take more accurate hits on thread holes". I checked some of the postings in the forum and it looks like there's a lot involved and the results are sketchy.
Unless the hole is
exactly square to the axis of the probe you will get bad hits.
Think about the chances of the combination (summation possibly?) of the hole axis, the probe head, and the stylus components exactly 'adding' up so that the cylindrical face of the stylus contact multiple thread peaks, all around the thread?
More likely you're going to 'shank' out. Also in pc-dmis although you can make it take hits on the shank during qualification, this achieves nothing - the only data used in calculating hits is the tip centre and diameter.
Unless the hole is
exactly square to the axis of the probe you will get bad hits.
Think about the chances of the combination (summation possibly?) of the hole axis, the probe head, and the stylus components exactly 'adding' up so that the cylindrical face of the stylus contact multiple thread peaks, all around the thread?
More likely you're going to 'shank' out. Also in pc-dmis although you can make it take hits on the shank during qualification, this achieves nothing - the only data used in calculating hits is the tip centre and diameter.
