In finish machining of an island on a casting with CNC milling machine, an end mill with 10 mm diameter is employed. The corner points of the island are represented by (0, 0), (0, 30), (50, 30) and (50, 0). By applying cutter radius right compensation, the trajectory of the cutter will be
A)(-5, 0), (-5, 35), (55, 35), (55,-5), (-5,-5)
B)(0,-5), (55,-5), (55, 35), (-5, 35), (-5,-5)
C)(5, 5), (5, 25), (45, 25), (45, 5), (5, 5)
D)(5, 5), (45, 5), (45, 25), (5, 25), (5, 5)

Question

Quizplus · Accepted Answer

Cutter radius compensation is used in CNC milling to adjust the tool path for the radius of the tool. Since the tool has a radius of 5 mm (half of the 10 mm diameter), the tool path needs to be offset by this amount to accurately machine the intended geometry. Option A correctly offsets the tool path by 5 mm outward from the original corner points to account for the tool radius, ensuring the machined island dimensions are accurate.

In Finish Machining of an Island on a Casting with CNC