Line profile - applicable filters?

Igxaq 10 months ago

Hi.

I evaluated a linear closed scan (with CAD) as line profile. It would be good to display information on the percentage of points that are out of tolerance. The second question is, I do not find any applicable filters to the linear closed scan setup windows. GOM and Zeiss software are supposed to have this option. Is there a way to remove dropouts from the scan?

Many thanks.

JEFMAN 10 months ago

Take a look here, page #1063, "Constructing a Filter Set"

https://downloads.ms.hexagonmi.com/docs/v2011manual

The number of filtered hits (outlier=3) can be calculated like this (set the decimal place at the max value) :

ASSIGN/V1=DOT(SCN1.HIT[1..SCN1.NUMHITS].XYZ-SCN1.HIT[1..SCN1.NUMHITS].TXYZ,SCN1.HIT[1..SCN1.NUMHITS].TIJK)........................................T values
ASSIGN/V2=SUM(V1)/SCN1.NUMHITS.........................................................................................................................................................................................average
ASSIGN/V3=(V2-V1)^2
ASSIGN/V4=SQRT((SUM(V3))/(SCN1.NUMHITS-1)).....................................................................................................................................................................std deviation
ASSIGN/V5=V2+3*V4......................................................................................................................................................................................................................higher limit
ASSIGN/V6=V2-3*V4.......................................................................................................................................................................................................................lower limit
ASSIGN/V7=((V1-V5)+ABS(V1-V5))/((V1-V5)+ABS(V1-V5))
ASSIGN/V8=((V1-V6)-ABS(V1-V6))/((V1-V6)-ABS(V1-V6))
ASSIGN/V9=SUM(V7)+SUM(V8).....................................................................................................................................................................................................number of filtered hits

In V5 and V6, you can replace "3*V4" by the tolerance value, it will give you the number of oot hits.