(New concept) Qualifying Disc probes with RDS XXT sensor.

[[Ri...]]

I would have preferred to speak with Tom Oaks prior to this, but I have no way of contacting him.

Credit for this new concept (new to me) goes to Tom Oaks because his documenting of qualifying Disc probes for RDS XXT sensors is partially used and prompted this new concept.

This new concept would eliminate the use of Ring gages to qualify Disc probes with the RDS XXT sensor and allow the programmer to create articulations along any necessary angle combination.

I have tested this method pretty well and the results are great, I have been using this concept for a while now (Monitored for accuracy during use).

Please see the attached word document and a sample CMM program, I would appreciate any feedback from fellow professionals.

Note: The example program needs fine tuning of the diameter values reported, I just chose not to finish that for an example program.

Creating and Qualifying Disc Probes for VAST-XXT using a Reference Sphere.docx Combo76R XXT Disk Probe Setup 25mm Ref Sphere.zip

[[To...]]

Hello Richard  I'll have to check this out.  The only reason I used a ring gage is that I wouldn't need to worry too much about the height of my circle.  With the Ref Sphere, I wouldn't know if I was exactly on the equator.  However, considering the tolerances, this may be adequate.

[[Ri...]]

There is a section or two that covers how to get the geometry to be on the equator.

The length of the SP probe vs the length of the Disk probe as X.

Sin of X for any angular articulation added to the length of the Disc probe or the value of X added to the length of any standard articulation (X, Y or Z).

I have rarely had to adjust length, and I found this is due to poorly made disc where perpendicularity was poor (Normal to angle of articulation).

[[Ro...]]

So the method I came up with to find the equator of the ref sphere...... Don't laugh... I take a piece of masking tape and apply it to a square at the height of the sphere. Blacken the tape with a sharpie and carefully transfer a smudge onto the sphere. Now you have a visual dot on the sphere that is about a millimeter around, of no practical thickness, and easy to remove. Then I can use that visual aid to take points "high side, low side" of the mark for disk probe qualification.

With a steady hand you can also put a mark on the top of the ball, dead center.

[[To...]]

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Missed that  😧