Measurement of scan length

I work in a facility where we make transmission insulators for power lines. We have to measure what they call leakage per customer drawing. We recently purchased a CMM machine and now EVERYONE wants EVERYTHING checked on it. Of course it's a new toy I get it. But I am trying to perform a scan without the model to measure leakage, but I am drawing a blank on how to measure them length of the actual scan that has traveled over the surface of the part. I tried it with free form scan, as well as linear open. Attached is a photo of the part thanks in advance for the help!

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AndersI over 6 years ago

...[lots of interesting mathematics]...

Actually, in this case PC-DMIS (CAD++) can do it by itself - just construct a curve from the scan hits, and dimension the curve length (L).

I did a test with 360 points on a circle Ø60.5, which should have a perimeter of 190.06636:

CRV1       =FEAT/CURVE,DEPENDENT,183,360,TOLERANCE,0.01
            THEO/190.066
            MEAS/190.066
            CONSTR/CURVE,CIR1.HIT[1..CIR1.NUMHITS],,
DIM LOC1= LOCATION OF CURVE CRV1  UNITS=MM ,$
GRAPH=OFF  TEXT=OFF  MULT=10.00  OUTPUT=BOTH  HALF ANGLE=NO
AX    NOMINAL       +TOL       -TOL       MEAS        DEV     OUTTOL
L      190.066      0.050     -0.050    190.066      0.000      0.000 ----#----
END OF DIMENSION LOC1

swalker over 6 years ago in reply to AndersI

Thank you I will give it a try!
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swalker over 6 years ago in reply to AndersI

Thank you I will give it a try!
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