I have an issue with the RFS value the system computes. The manual tells us it is two times the distance from the true position to the observed position. What does this mean?

I have an issue with the RFS value the system computes. The manual tells us it is two times the distance from the true position to the observed position. What does this mean?

 

When you calculate RFS for CIRCLES, the software internally projects the center of the NOMINAL to the plane of the MEASURED. Then finds the distance between the projection of the nominal and the measured and multiplies it by 2.

 

For measured or constructed POINTS, the software doesn't know of any plane associated with the it, hence when you ask for RFS it will calculate the 3D distance between the points and multiply it by 2. This is why some of the RFS values in this file are high. They only care about X and Z but the Y is 10mm off and it throws off the calculation of RFS. Since the points have a Y value, the solution would be to use it for the for the nominal instead of leaving it as ZERO. In short, key in all the elements of the position of the circle (X, Y, Z) if you want a good calculation.

 

 

 

 

Keywords: Version 3.92, CAM2, RFS, REF Values, Software, true position, mmc