How to make program for Helical Milling ?

In helical milling program we are widening diameter of hole up to 31.5mm . Lets see how to make program for helical milling ;

O1234

N10  M06 T0606 ;

N20  G91 G54 G21 G17 G80 G43 ;

N30  M03 S1200 ;

N40  G00 X0.0 Y0.0 ‘

N50  G00 Z10 M08 ;

N60  G01 Z0 G95 F0.2 ;

N70  G01 X15.5 G41 ;

N80  G03 I= -15.75 Z= IC (-4) ;

N90  G03 I= -15.75 Z= IC (-4) ;

N100 G03 I= -15.75 Z= IC (-4) ;

N110 G03 I= -15.75 Z= IC (-4) ;

N120 G03 I= -15.75 Z= IC (-4) ;

N130 G03 I= -15.75 Z= IC (-4) ;

N140 G03 I= -15.75 Z= IC (-4) ;

N150 G01 X0.0 G40 ;

N160 G00 Z50 ;

N170 M09 M05 M30 ;

DESCRIPTION

O1234 ;

N10- Tool change command, select cutter no. 6 .

N20- Program in the incremental coordinate system, work coordinate destination on milling machine, all dimension in “mm”, select xy plane, cancelled canned cycle if apply, tool height offset compensation negative ;

N30 – Spindle on clockwise speed 1200 r.p.m .

N40 – Rapid traverse where at position  X0 & Z0 .

N50- Rapid traverse where tool moves at the position Z10 , coolant is on .

N60- linear interpolation command where Z is 0 . (tool touch to workpiece ) , feed rate per revolution  is 0.2

N70- linear interpolation command where tool take position 15.75 in X axis , tool radius compensation left.

N80- Circular interpolation counterclockwise where I = -15.75 & depth of cut in Z axis is -4 .( first cut imaginary point P0 to P1)

      I= An incremental distance and direction from the start point of the arc to the arc centre along the X axis.

N90- Circular interpolation counter clockwise where I = -15.75 & depth of cut in Z axis is -4 . ( Second cut from point P1 to P2)

N100- Circular interpolation counter clockwise where I = -15.75 & depth of cut in Z axis is -4 . ( Third cut from point P2 to P3)

N110- Circular interpolation counter clockwise where I = -15.75 & depth of cut in Z axis is -4 . ( Fourth cut from point P3 to P4)

N120- Circular interpolation counter clockwise where I = -15.75 & depth of cut in Z axis is -4 . ( Fifth cut from point P4 to P5)

N130- Circular interpolation counter clockwise where I = -15.75 & depth of cut in Z axis is -4 . ( Sixth cut from point P5 to P6)

N140- Circular interpolation counter clockwise where I = -15.75 & depth of cut in Z axis is -4 . ( The seventh cut from point P6 to P7)

N150- linear interpolation command where tool return at starting position X =0 , tool nose compensation off.

N160- Rapid traverse where tool moves at the position Z50 .

N170- Coolant off , spindle off , main program end .