How make formula of distance

Giving it a shot...

x = distance between both circles centerpoints

"Distance?" = ABS((x + Circle1.radius) - Circle2.radius)

JEFMAN

Thank you, vpt.se
After calculate, how to show result in inspection report.?

That will give a distance assuming the circles are perfectly round. If you're actually looking for "material thickness" examples can be found in other threads, for example https://www.pcdmisforum.com/forum/pc-dmis-enterprise-metrology-software/pc-dmis-for-cmms/417827-material-thickness-with-autofeature-points#post417827

insert->dimension->Keyin

then copy and paste fomula as MEAS value

CIRCLE1 =FEAT/CONTACT/CIRCLE/DEFAULT,CARTESIAN,OUT,LEAST_SQR
THEO/<0,0,0>,<0,0,1>,20,0
ACTL/<0,0,0>,<0,0,1>,20,0
TARG/<0,0,0>,<0,0,1>
START ANG=0,END ANG=0
ANGLE VEC=<1,0,0>
DIRECTION=CCW
SHOW FEATURE PARAMETERS=NO
SHOW CONTACT PARAMETERS=YES
NUMHITS=7,DEPTH=5,PITCH=0
SAMPLE METHOD=SAMPLE_HITS
SAMPLE HITS=0,SPACER=0
AVOIDANCE MOVE=BOTH,DISTANCE=10
FIND HOLE=DISABLED,ONERROR=NO,READ POS=NO
SHOW HITS=NO
CIRCLE2 =FEAT/CONTACT/CIRCLE/DEFAULT,CARTESIAN,OUT,LEAST_SQR
THEO/<10,0,0>,<0,0,1>,23,0
ACTL/<10,0,0>,<0,0,1>,23,0
TARG/<10,0,0>,<0,0,1>
START ANG=0,END ANG=0
ANGLE VEC=<1,0,0>
DIRECTION=CCW
SHOW FEATURE PARAMETERS=NO
SHOW CONTACT PARAMETERS=YES
NUMHITS=7,DEPTH=5,PITCH=0
SAMPLE METHOD=SAMPLE_HITS
SAMPLE HITS=0,SPACER=0
AVOIDANCE MOVE=BOTH,DISTANCE=10
FIND HOLE=DISABLED,ONERROR=NO,READ POS=NO
SHOW HITS=NO
DIM LOC1= KEYED IN DIMENSION OUTPUT=BOTH
AX NOMINAL +TOL -TOL MEAS DEV OUTTOL
M 8.500 0.010 -0.010 ABS((DIST3D({CIRCLE1},{CIRCLE2}) + CIRCLE1.RADIUS) - CIRCLE2.RADIUS) 0.000

A warning, if these circles are placed on different heights you will get a longer distance as you are using DIST3D.

Yes, as always it is dependent on the application and the caveats associated with them.

Create a generic feature with the "Distance?" value as one of the measured values, then dimension the generic feature accordingly.

You might try something like.......

If the circles are of sufficient form and at the same height...........

Create a line (lin1) between the 2 circles

Rotate to the line

Translate (x,y) to the smaller circle

Create CAST line (lin2) from lin1

create pierce points from cir2, lin2 and cir1,lin2

create distance dimension between pierce points

Thank you for support,
I got it.!

thank you very much for supporting.

Some time, when I programing or running measuring, my software automatic close and display dialog to send error to hexagon.

can you give me some advise.

I use Optiv Classic 443, PCDMIS 2017 Pro R1, Windows 10 pro 64bit.