Question

In a CNC milling operation the tool has to machine the circular arc from point (20, 20) to (10, 10) at sequence number 5 of the CNC part program. If the center of the arc is at (20, 10) and the machine has incremental mode of defining position coordinates, the correct tool path command is

• A. N 05 G91 G03 X-10 Y-10 R10
• B. N 05 G90 G03 X20 Y20 R10
• C. N 05 G90 G01 X-10 Y-10 R 10
• D. N 05 G91 G02 X20 Y20 R10

Answer 1

The correct option is A N 05 G91 G03 X-10 Y-10 R10


Radius of circle =10
Incremental coordinate system is used. Anti clockwise is the motion form A to B
$\because$(b) is the correct answer.