What does MIC, CMI and CLSQ stand for in the measurement software output?

K

khalchris

I got some results back for a drilled hole size and I got the following file with some values but I am not sure which ones to consider for hole size:

MIC1[1,1] X 47.993302 48.000000 0.050000 0.050000 50
MIC1[1,1] Y -24.002334 -24.000000 0.050000 0.050000 50
MIC1[1,1] Z -1.003735 -1.000000 0.050000 0.050000 50
MIC1[1,1] D 5.998988 6.000000 0.050000 0.050000 50
MIC2[1,1] X 47.998463 48.000000 0.050000 0.050000 50
MIC2[1,1] Y -24.008510 -24.000000 0.050000 0.050000 50
MIC2[1,1] Z -6.008636 -6.000000 0.050000 0.050000 50
MIC2[1,1] D 5.995579 6.000000 0.050000 0.050000 50
LSQ1[1,1] D 6.007228 6.000000 0.050000 0.050000 50
LSQ2[1,1] D 6.003916 6.000000 0.050000 0.050000 50
CIRTY1[1,1 M 0.009178 0.000000 0.000000 0.010000 50
CIRTY2[1,1 M 0.015057 0.000000 0.000000 0.010000 50
CMI1[1,1] X 47.996996 48.000000 0.050000 0.050000 50
CMI1[1,1] Y -24.005110 -24.000000 0.050000 0.050000 50
CMI1[1,1] Z -3.512765 -3.500000 0.050000 0.050000 50
CMI1[1,1] D 5.995022 6.000000 0.050000 0.050000 50
CLSQ1[1,1] D 6.005566 6.000000 0.050000 0.050000 50
STRA1[1,1] M 0.009806 0.000000 0.000000 0.010000 50
PERP1[1,1] M 0.004931 0.000000 0.000000 0.010000 50

it seems that the machine measured the hole size at three different locations: Top, middle and bottom, and used the MIC algorithm for top and bottom, for the middle it used the CMI criteria, it seems also the top, bottom and the middle D values were measured using the LSQ criteria as well (LSQ1,LSQ2, and CLSQ) algorithm. then got the straightness?, and the perpendicularity at the end?.

1-What does MIC, CMI and CLSQ stand for in the software? does MIC stand for (Maximum Inscribed or Minimum Circumscribed circle)?
2-Which one should we usually consider for the hole size the MIC or LSQ? (there is a good difference between results)
 
J

JustDeb

Without knowing the CMM software format I would guess that MIC is Maximum Inscribed Circle and LSQ is Least Square Circle. I'm thinking that CMI and CLSQ are just the respective center measures of MIC and LSQ.

Which measurement to use would depended on the feature being measured or the customer preference. In this case I would think the MIC.

If you have a need to generate inspection reports with integrated CMM data I would recommend InspectionXpert. I use their software to generate inspection reports using PC-DMIS and Calypso CMM data. CMMXpert will import results from dozens of CMM formats and assign them to corresponding features on an inspection drawing.
 
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