Editiing an nc file

CNC Machines Shapeoko
1

I had a job stop halfway threw,
i was thinking i could edit the nc code leading up to that point.
Are there any required lines needed at the beginning to leave in

2

To do this:

  • note what line the machine is currently sending (or determine where it was by measuring the deepest area correctly cut)
  • pause, then stop the job and shut things down
  • open up the G-Code file in a text editor
  • identify the preamble and copy it — see GRBL G-code definitions for the details of the codes
  • go to the line # noted above
  • scroll up from there until you find a move down from safety height
  • delete everything from the line above that line to the beginning of the file
  • paste in the preamble at the beginning
  • save under a new name
3

this is the start of my code it stoped at line 27000 roughly
can you help me decide what to keep at the beginning
%
(dish1)
(T15 D=0.25 CR=0 - ZMIN=0.1603 - flat end mill)
G90
G17
G20
G28 G91 Z0
G90

(Adaptive1)
M9
T15 M6
S12500 M3
G54
M7
G0 X-2.1502 Y-0.0363
Z1.92
Z1.72
Z1.62
G3 X-2.3766 Y0.0359 Z1.607 I-0.1132 J0.0361 F60
X-2.1502 Y-0.0363 Z1.5939 I0.1132 J-0.0361
X-2.3766 Y0.0359 Z1.5809 I-0.1132 J0.0361
X-2.1502 Y-0.0363 Z1.5679 I0.1132 J-0.0361
X-2.3766 Y0.0359 Z1.5549 I-0.1132 J0.0361
X-2.1502 Y-0.0363 Z1.5418 I0.1132 J-0.0361
X-2.3766 Y0.0359 Z1.5288 I-0.1132 J0.0361
X-2.1502 Y-0.0363 Z1.5158 I0.1132 J-0.0361
X-2.3766 Y0.0359 Z1.5028 I-0.1132 J0.0361
X-2.1502 Y-0.0363 Z1.4897 I0.1132 J-0.0361
X-2.3766 Y0.0359 Z1.4767 I-0.1132 J0.0361
X-2.1502 Y-0.0363 Z1.4637 I0.1132 J-0.0361
X-2.3766 Y0.0359 Z1.4506 I-0.1132 J0.0361
X-2.1502 Y-0.0363 Z1.4376 I0.1132 J-0.0361
X-2.3766 Y0.0359 Z1.4246 I-0.1132 J0.0361
X-2.1502 Y-0.0363 Z1.4116 I0.1132 J-0.0361
X-2.3766 Y0.0359 Z1.3985 I-0.1132 J0.0361
X-2.1502 Y-0.0363 Z1.3855 I0.1132 J-0.0361
X-2.3766 Y0.0359 Z1.3725 I-0.1132 J0.0361
X-2.1502 Y-0.0363 Z1.3594 I0.1132 J-0.0361
X-2.3766 Y0.0359 Z1.3464 I-0.1132 J0.0361
X-2.1502 Y-0.0363 Z1.3334 I0.1132 J-0.0361
X-2.3766 Y0.0359 Z1.3204 I-0.1132 J0.0361
X-2.1502 Y-0.0363 Z1.3073 I0.1132 J-0.0361
X-2.3766 Y0.0359 Z1.2943 I-0.1132 J0.0361
X-2.2816 Y-0.1176 Z1.2872 I0.1132 J-0.0361
X-2.1446 Y-0.0002 Z1.28 I0.0182 J0.1174
X-2.3822 I-0.1188 J0
X-2.1446 I0.1188 J0
S17000
G1 X-2.1444 Y0.0108 F100
X-2.1354 Y0.0539
X-2.1344 Y0.0598
X-2.1338 Y0.0658
Y0.0719
X-2.1344 Y0.0785
X-2.1355 Y0.0854
X-2.1373 Y0.0926
X-2.1398 Y0.1002
X-2.1431 Y0.1079
X-2.1472 Y0.1157
X-2.1521 Y0.1236
X-2.1579 Y0.1313
X-2.1646 Y0.1389
X-2.1722 Y0.1462
X-2.1807 Y0.1532
X-2.1899 Y0.1596
X-2.2 Y0.1654
X-2.2108 Y0.1706
X-2.2223 Y0.175
X-2.2344 Y0.1785
X-2.247 Y0.1812
X-2.26 Y0.1828
X-2.2733 Y0.1834

4

This is the preamble and should be kept:

Each toolpath will begin w/ a section similar to:

and at the end there will be a post-amble which usually contains instructions to lift and M2 or M30

5

thank you for the help

6

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