Measure Cir1 and Cir2
Assuming that Cir1 is to the left and Cir2 is to the right in the XY plane.
Do an alignment between the two features.
Add Cir1.R to Cir1.Y and store the result in variable Cir1_A
Create a generic point using Cir.X, Cir1_A, Cir1.Z and name it Cir1_tan
Do the same thing for Cir2.
Construct a line between Cir1_tan and Cir2_tan
Measure Cir1 and Cir2
Assuming that Cir1 is to the left and Cir2 is to the right in the XY plane.
Do an alignment between the two features.
Add Cir1.R to Cir1.Y and store the result in variable Cir1_A
Create a generic point using Cir.X, Cir1_A, Cir1.Z and name it Cir1_tan
Do the same thing for Cir2.
Construct a line between Cir1_tan and Cir2_tan
Thank you very much for your explanation. so tangent line can achieve by calculation,
when I Was using software verisurf, the software itself did it automatically and also asked about internal tangent and external tangent .line.
hopefully the next version of PC-DMIS include this command
