:100
G70 (INCH MODE)
G90 (ABSOLUTE MODE)
G75 (4 QUADRANT ARCS)
M00 (STOP TO SET TOOL = 1/8 drill)
G92 X0.0 Y0.0 Z1.0 (MACHINE ACCEPTS AS CURRENT POSITION)
G00 Z1.1 (HOP UP TO CLEAR & START MOTOR)

(part A1)
G00 X0.5625 Y0.5625 (post centering pin)
G25 #drillAi (Runs subroutine #drillAi)

(part A2)(already 1/8 deep)
(drill the spindle)
G00 X1.8444 Y0.5625 
G00 Z0.875 (hop to surface)
G01 Z0.6 (PLUNGE to 0.6)
G00 Z1.1 (hop to CLEAR PLANE)

(partA3)
G00 X3.1263 Y0.5625 (post centering pin)
G25 #drillAi (Runs subroutine #drillAi)

(part B3)(already 1/16 deep)
G00 X3.1263 Y2.8111 (post centering pin)
G25 #drillBi (Runs subroutine #drillBi)

(part B2)(already 3/16 deep)
(drill the spindle)
G00 X1.8444 Y2.8111 
G00 Z0.8125 (hop to surface)
G01 Z0.6 (PLUNGE to 0.6)
G00 Z1.1 (hop to CLEAR PLANE)

(part B1)(already 1/16 deep)
G00 X0.5625 Y2.8111 (post centering pin)
G25 #drillBi (Runs subroutine #drillBi)

G95 #PATH002 (CHAIN TO 1/16 end mill program)


(**************SUBROUTINE #drillAi****************)
(drills 1/4 deep from Z1.0)
#drillAi
G00 Z1.0 (hop to surface)
G01 Z0.6 (PLUNGE to 0.6)
G00 Z1.1 (hop to CLEAR PLANE)
M17 (return from subroutine)

(**************SUBROUTINE #drillBi****************)
(drills 1/4 deep from Z0.9375)
#drillBi
G00 Z0.9375 (hop to surface)
G01 Z0.6 (PLUNGE to 0.6)
G00 Z1.1 (hop to CLEAR PLANE)

M17 (return from subroutine)