Sphere Cylinder Intersection

[kingsld1]

Working OFFLINE from HOME.

I need to find an intersection of an internal cylinder and an internal sphere. Need to find the height at which the cylinder contacts the sphere. Tried to construct a circle from the intersection of the cylinder and sphere but PC DMIS doesn't support that. Decided my best option was to create a generic point using an intersection formula I googled. Square root of (sphere_radius squared - cylinder radius squared) Tried turning that into an assignment as follows:

DIM D3= LOCATION OF SPHERE SPH1 UNITS=MM ,$
GRAPH=OFF TEXT=OFF MULT=10.00 OUTPUT=BOTH HALF ANGLE=NO
AX NOMINAL +TOL -TOL MEAS DEV OUTTOL
X 0.000 0.050 0.050 0.000 0.000 0.000 ----#----
Y 0.000 0.050 0.050 0.000 0.000 0.000 ----#----
Z 0.000 0.050 0.050 0.000 0.000 0.000 ----#----
D 5.207 0.050 0.050 5.207 0.000 0.000 ----#----
R 2.603 0.025 0.025 2.603 0.000 0.000 ----#----
END OF DIMENSION D3

DIM D4= LOCATION OF CYLINDER CYL1 UNITS=MM ,$
GRAPH=OFF TEXT=OFF MULT=10.00 OUTPUT=BOTH HALF ANGLE=NO
AX NOMINAL +TOL -TOL MEAS DEV OUTTOL
X 0.000 0.050 0.050 0.000 0.000 0.000 ----#----
Y 0.000 0.050 0.050 0.000 0.000 0.000 ----#----
Z -4.830 0.050 0.050 -4.830 0.000 0.000 ----#----
D 2.381 0.050 0.050 2.381 0.000 0.000 ----#----
R 1.190 0.025 0.025 1.191 0.000 0.000 ----#----
END OF DIMENSION D4

ASSIGN/SPH_RAD_SQD=D3.R.MEAS*D3.R.MEAS

ASSIGN/CYL_RAD_SQD=D4.R.MEAS*D4.R.MEAS

ASSIGN/V1=SQR(SPH_RAD_SQD-CYL_RAD_SQD)

F1 =GENERIC/POINT,DEPENDENT,CARTESIAN,$
NOM/XYZ,<0,0,0>,$
MEAS/XYZ,<0,0,V1>,$
NOM/IJK,<0,0,1>,$
MEAS/IJK,<0,0,1>

My issue is that V1's value is Zero. I suspect that working offline is not doing assignments properly. Is there a work around to get the assignments updated or another way to find the height at which a cylinder contacts a sphere? Or did I just not code the formula in correctly?

[dph51]

Maybe D3.R
D4.R
without the .meas

[JEFMAN]

I would use directly SPH1.R and CYL1.R...
In addition, it's "SQRT" and not "SQR"...
So V1 is zero because of an unknown function...

ASSIGN/V1=SQRT((SPH1.R)^2-(CYL1.R)^2)

[kingsld1]

Got this to work. Variable didn't want to process the assignment.

F1 =GENERIC/POINT,DEPENDENT,CARTESIAN,$
NOM/XYZ,<0,0,-2.284>,$
MEAS/XYZ,<0,0,(SQRT(SPH1.R^2-CYL1.R^2)*-1)>,$
NOM/IJK,<0,0,1>,$
MEAS/IJK,<0,0,1>