; drill a bolt hole circle for 6 bolts at diameter 3 inches

G20 G17 G90

; position over first hole, establishing our radius of 1.5
; an equivalent command would be G0 @1.5 ^0 Z0
G0 X1.5 Y0 Z0

; drill six holes, incrementing 60 degrees each time
G91 G81 R.1 Z-.5 ^60 L6 F10

M2