CNC program example to show how two combined arc can be programmed with G02 G03 for a cnc lathe.
First arc is programmed using G02 R, but the second arc is programmed using G03 I K
G02 G03 Programming Example
N50 G00 X20 Z85 N60 G96 S200 N70 G01 Z80 N80 G02 X50 Z65 R15 N90 G03 X50 Z35 I-10 K-15 N100 G00 X80 N110 G97 S900 M05 N120 M30