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tangent line

Hello everyone,
how can I construct a line that is an external tangent to two circles​?

Thanks
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  • Generic Features are your friends.

    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
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