BFRE construction and probes used

I'm not 100% on this, but, I believe that used to be the case but isn't any longer.

I'm like 90% sure I tried this once (with two significantly different tip sizes) and it worked fine, but it would probably be worth trying it just to make sure.

You can construct it at any point in the program (in every version on PC-DMIS I have used). You can do this with multiple probes.

What kind of feature do you want to construct ?
I believe you can check the construction using RAWHIT and PROBEDATA("diam").
For a circle, for example, you could create a feature set with points measured with diameter 1 and another with points measured with diameter 2 (and so on).
Construct a BFRE circle CIRC1 from points, and then :
ASSIGN/V1=UNIT(SCN1.RAWHIT[1..SCN1.NUMHITS].XYZ-CIRC1.XYZ)
ASSIGN/V2=UNIT(SCN2.RAWHIT[1..SCN2.NUMHITS].XYZ-CIRC1.XYZ)
ASSIGN/V3=DOT(V1,SCN1.HIT[1..SCN1.NUMHITS].IJK)
ASSIGN/V4=DOT(V2,SCN2.HIT[1..SCN2.NUMHITS].IJK)
​If V3 and V4 are array of ones, then the demon didn't change the vector, so I think the compensation is wrong (or the hits are exactly perp to the surface - in this case BF and BFRE should be exactly the same)

If the dot product of 2 unit vectors is 1, then the cos of the angle between vectors is also 1, so angle is 0)

Toying with changing plane and cylinder measurement and constructions. A family of implant trials that are a PITA to measure with our standard probe configurations as we have 17 CMMs and need to keep them standardized in as many ways as possible as management doesn't want "special needs probes" on just one CMM