[cncmadness]

I have completed the job and was able to solve my problem.

I am making a part and I need to take the G-code that is generated by the system and modify it so that I can do a more advanced operation then the software allows. If you look at the attached picture, it shows a block of wood(Finished) and the cutter. The programming I have now is able to start at the top of the wood block and cut straight down to make a straight shaft. But now I need the cutter to move into the wood to make a section of the shaft thinner. So my plan was to take the G-code that is generated by the software and modify it so that it does what I need. At the moment the code starts at the top of the shaft and cuts the full length of the shaft to make a square block round, The problem is that the code places the bit where it needs it and goes straight down. I need to make it so that it goes down to the proper depth and then moves into the part and then cut around it. Then when the cut is complete, move away from the part and up. Then back to home. Hope this makes sense. Below is the g-code that I plan to work off of. Please let me know if any additional info is required to help me out. Thanks in advance.

Sorry about the picture as it is upside down

(Tools used in this file: )
(0 = End Mill {9.38mm} Key Hole)
N100G00G20G17G90G40G49G80
N110G70G91.1
N120T0M06
N130 (End Mill {9.38mm} Key Hole)
N140G00G43Z0.3937H0
N150S10000M03
N160(Toolpath:- Profile 1 [7])
N170()
N180G94
N190X0.0000Y0.0000F59.1
N200G00X2.3051Y0.6235Z0.1969
N210G1Z-0.2891F23.6
N220G2X2.7103Y0.2184I0.0000J-0.4051F59.1
N230G2X2.3051Y-0.1867I-0.4051J0.0000
N240G2X1.9000Y0.2184I0.0000J0.4051
N250G2X2.3051Y0.6235I0.4051J0.0000
N260G1Z-0.3683F23.6
N270G2X2.7103Y0.2184I0.0000J-0.4051F59.1
N280G2X2.3051Y-0.1867I-0.4051J0.0000
N290G2X1.9000Y0.2184I0.0000J0.4051
N300G2X2.3051Y0.6235I0.4051J0.0000
N310G1Z-0.4475F23.6
N320G2X2.7103Y0.2184I0.0000J-0.4051F59.1
N330G2X2.3051Y-0.1867I-0.4051J0.0000
N340G2X1.9000Y0.2184I0.0000J0.4051
N350G2X2.3051Y0.6235I0.4051J0.0000
N360G1Z-0.5268F23.6
N370G2X2.7103Y0.2184I0.0000J-0.4051F59.1
N380G2X2.3051Y-0.1867I-0.4051J0.0000
N390G2X1.9000Y0.2184I0.0000J0.4051
N400G2X2.3051Y0.6235I0.4051J0.0000
N410G1Z-0.6060F23.6
N420G2X2.7103Y0.2184I0.0000J-0.4051F59.1
N430G2X2.3051Y-0.1867I-0.4051J0.0000
N440G2X1.9000Y0.2184I0.0000J0.4051
N450G2X2.3051Y0.6235I0.4051J0.0000
N460G1Z-0.6852F23.6
N470G2X2.7103Y0.2184I0.0000J-0.4051F59.1
N480G2X2.3051Y-0.1867I-0.4051J0.0000
N490G2X1.9000Y0.2184I0.0000J0.4051
N500G2X2.3051Y0.6235I0.4051J0.0000
N510G1Z-0.7645F23.6
N520G2X2.7103Y0.2184I0.0000J-0.4051F59.1
N530G2X2.3051Y-0.1867I-0.4051J0.0000
N540G2X1.9000Y0.2184I0.0000J0.4051
N550G2X2.3051Y0.6235I0.4051J0.0000
N560G1Z-0.8437F23.6
N570G2X2.7103Y0.2184I0.0000J-0.4051F59.1
N580G2X2.3051Y-0.1867I-0.4051J0.0000
N590G2X1.9000Y0.2184I0.0000J0.4051
N600G2X2.3051Y0.6235I0.4051J0.0000
N610G00Z0.1969
N620G00Z0.3937
N630G00X0.0000Y0.0000
N640M09
N650M30
%


I have modified the code and hoping that someone can now check my work and see it they see any problems with what I have changed. All the changes I made are in red and I have changed the numbers at the beginning of each line so the sequence was correct. I have placed brackets with the description of what I hope would happen. Thanks

( Drill 1 )
( File created: Monday, April 13, 2015 - 07:22 PM)
( for Mach2/3 from Vectric )
( Material Size)
( X= 24.016, Y= 22.047, Z= 1.693)
()
(Toolpaths used in this file
(Profile 1 [7])
(Tools used in this file: )
(0 = End Mill {9.38mm} Key Hole)
N100G00G20G17G90G40G49G80
N110G70G91.1
N120T0M06
N130 (End Mill {9.38mm} Key Hole)
N140G00G43Z0.3937H0
N150S10000M03
N160(Toolpath:- Profile 1 [7])
N170()
N180G94
N190X0.0000Y0.0000F59.1
N200G00X2.3051Y0.8000Z0.1069(Move to part with extra Y axis)
N210G1Z-0.2891F23.6(drop to first cutting depth)
N220G00X2.3051Y0.6235(Move to start of cut)
N230G2X2.7103Y0.2184I0.0000J-0.4051F59.1(continue program to cut shaft)
N240G2X2.3051Y-0.1867I-0.4051J0.0000
N250G2X1.9000Y0.2184I0.0000J0.4051
N260G2X2.3051Y0.6235I0.4051J0.0000
N270G1Z-0.3683F23.6
N280G2X2.7103Y0.2184I0.0000J-0.4051F59.1
N290G2X2.3051Y-0.1867I-0.4051J0.0000
N300G2X1.9000Y0.2184I0.0000J0.4051
N310G2X2.3051Y0.6235I0.4051J0.0000
N320G1Z-0.4475F23.6
N330G2X2.7103Y0.2184I0.0000J-0.4051F59.1
N340G2X2.3051Y-0.1867I-0.4051J0.0000
N350G2X1.9000Y0.2184I0.0000J0.4051
N360G2X2.3051Y0.6235I0.4051J0.0000
N370G1Z-0.5268F23.6
N380G2X2.7103Y0.2184I0.0000J-0.4051F59.1
N390G2X2.3051Y-0.1867I-0.4051J0.0000
N400G2X1.9000Y0.2184I0.0000J0.4051
N410G2X2.3051Y0.6235I0.4051J0.0000
N420G1Z-0.6060F23.6
N430G2X2.7103Y0.2184I0.0000J-0.4051F59.1
N440G2X2.3051Y-0.1867I-0.4051J0.0000
N450G2X1.9000Y0.2184I0.0000J0.4051
N460G2X2.3051Y0.6235I0.4051J0.0000
N470G1Z-0.6852F23.6
N480G2X2.7103Y0.2184I0.0000J-0.4051F59.1
N490G2X2.3051Y-0.1867I-0.4051J0.0000
N500G2X1.9000Y0.2184I0.0000J0.4051
N510G2X2.3051Y0.6235I0.4051J0.0000
N520G1Z-0.7645F23.6
N530G2X2.7103Y0.2184I0.0000J-0.4051F59.1
N540G2X2.3051Y-0.1867I-0.4051J0.0000
N550G2X1.9000Y0.2184I0.0000J0.4051
N560G2X2.3051Y0.6235I0.4051J0.0000
N570G1Z-0.8437F23.6
N580G2X2.7103Y0.2184I0.0000J-0.4051F59.1
N590G2X2.3051Y-0.1867I-0.4051J0.0000
N600G2X1.9000Y0.2184I0.0000J0.4051
N610G2X2.3051Y0.6235I0.4051J0.0000
N200G00X2.3051Y0.8000Z-0.8437(Move away from part before rising Z axis)
N620G00Z0.1969
N630G00Z0.3937
N640G00X0.0000Y0.0000
N650M09
N660M30
%

[billcha]

I think you have num or acramatic or something like this control because I saw G70 (inch mode). You need a helix operation I think.
You start from X0.0 Y0.0 Z0.0 to z-0.850"
I don't know the final hole size diameter
After LOAD TOOL try this

N14 G00 X0. Y0. Z0.6
N15 G00 Z0.039
N16 G0 X-0.816 Y0. Z0.039 X axis position
N17 F60 federate 60in/min
N18 G1 Z0.
N19 G3 X-0.816 Y0.000 Z0.000 I0.000 J0.000 X axis calculated= final diameter/2 - tool diameter/2
N20 G3 X-0.816 Y0.000 Z-0.200 I0.000 J0.000 X axis calculated for 2in hole diameter
N21 G3 X-0.816 Y0.000 Z-0.400 I0.000 J0.000
N22 G3 X-0.816 Y0.000 Z-0.600 I0.000 J0.000
N23 G3 X-0.816 Y0.000 Z-0.800 I0.000 J0.000
N24 G1 X-0.816 Y0.000 Z-0.850
N25 G3 X-0.816 Y0.000 Z-0.850 I0.000 J0.000 final Z-0.850"
N26 G1 Z0.039
N27 (--- END OF CIRCULAR MILL ---)
N28 (--- CYCLE END ---)
N29 G00 Z0.1
N30 G00 Z0.6 Return to initial Z
N31 M09
N32 M05
N33 (END OF TOOL T0)
This is for num control. If you have something else let me know