Create an NC code for the following part: Spot or center drill for starting hole

Question

Create an NC code for the following part:

Spot or center drill for starting holes, 1/8” diameter (center_4)

Twist drill for drilling holes, 1/4” diameter (TD0250)

Square Endmill for milling the pockets, 1/2” diameter (EM0500)

Machining parameters :

Holes must be spot/center drilled before twist drilling.

Milling requires a finish pass of 0.050 inches.

Machining should be done with a spindle speed of 2500 RPM.

Spot/center and twist drilling should have a feed rate of 10 IPM.

Rough passes should have a feed rate of 25 IPM.

Finish passes should have a feed rate of 20 IPM.

0.250 Pocket 1.5 x 1.0, 0.25 Deep, 0.4 Corner Radius 0.25 Dia, 0.15 Deep, 2 Holes 3,000 3.000 1.750 0.750 0.250 1.000 1.750 2.500 5.000

Explanation / Answer

N01 G00 G71 G20 G90 G94;

N02 M06 T01;

N03 M03 S2500;

N04 M08;

N05 G00 X22 Z0.5;

N06 G01 X0 Y0 F10;

N061 G81;

//HOLE 1

N07 X1 Y0.75 R 0.125 Z-0.1;

//Tool change T1 to T2

N063 MO6 T02;

N07 Z-0.15;

N073 MO6 T01;

N08 X2.5 Y2.25 R0.125 Z-0.1;

N083 MO6 T02;

N084 Z-0.15;

//POCKET MILLING

N073 MO6 T03;

N081 G00 X2.15 Y0.25 Z0.2;

Z-0.25;

N082 G01 X2.85 ;

N09 G03 X3.25 Y0.65 R 0.4;

N091 G01 Y0.85;

N10 G03 X2.85 R0.4 ;

N101 G01 X2.15;

N102 G03 X1.75 Y 0.85 R0.4;

N11Y0.65;

N12 G03 X2.15 Y0.25 R0.4;

//POCKET 2

N13 G00 X0.65 Y1.75 Z2;

N131 Z-0.25

N15 G01 X1.35 ;

N16 G03 X1.75 Y2.15 R 0.4;

N161 G01 Y2.35 ;

N17 G03 X1.35 Y2.75 R0.4;

N171 G01 X0.65;

N172 G03 X0.25 Y2.35 R0.4;

N118 G01Y2.15;

N119 G03 X0.65 Y1.75 R0.4;

N120 GOO X0 Y0 Z2;

N18 M09;

N19 M30;

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