Programming knurling - anyways to simplify?

[compunerdy]

I am hand writing g-code for doing knurling on a 4th axis.

It cuts from 0 to 180 deg and then back to 360 goes forward 10 deg and then restarts.

My question is how can you simplify this? Is there someway to make it rest a to zero each time or some other way to make it so I wont end up at a999999 when I am done programming it?

This is on a Tormach mill running mach 3. Here is a sample of the code.

G1 x6 A180 f15
G1 x2.5 A360 f15
g1 A370 f6

G1 x6 A550 f15
G1 x2.5 A730 f15
g1 A740 f6

G1 x6 A920 f15
G1 x2.5 A1100 f15
g1 A1110 f6

G1 x6 A1290 f15
G1 x2.5 A1470 f15
g1 A1480 f6

G1 x6 A1660 f15
G1 x2.5 A1840 f15
g1 A1850 f6

G1 x6 A2030 f15
G1 x2.5 A2210 f15
g1 A2220 f6

G1 x6 A2400 f15
G1 x2.5 A2580 f15
g1 A2590 f6

G1 x6 A2770 f15
G1 x2.5 A2950 f15
g1 A2960 f6

G1 x6 A3140 f15
G1 x2.5 A3320 f15
g1 A3330 f6

Thanks, Tim

[HuFlungDung]

I'm not sure what capabilities you've got to run subroutines, but on a Haas we'd perhaps do it like this, running the routine in incremental mode:

Main program
......
M3
G90 G0 X6 A0
M97 N100 L36
....
M30
Subroutine
N100 G91
A180 F15
G1 X-3.5 A180
G1 A10 F6
G1 X3.5 A180 F15
M99

[compunerdy]

I did a little searching and I think something like this might work.

G90 G54 G17 G40 G80 G49
M8
S5100 M3

G0 x2.5
g0 z.15

g0 a0
G1 z-0.03 f2

M98 P1
G92 A0
M98 P1
G92 A0
M98 P1
G92 A0
M98 P1
G92 A0
M98 P1
G92 A0
M98 P1
G92 A0
M98 P1
G92 A0
M98 P1
G92 A0
M98 P1
G92 A0
M98 P1
G92 A0
M98 P1
G92 A0
M98 P1
G92 A0
M98 P1
G92 A0
M98 P1
G92 A0
M98 P1
G92 A0
M98 P1
G92 A0
M98 P1
G92 A0
M98 P1
G92 A0
M98 P1
G92 A0

O1
G1 x6 A180 f15
G1 x2.5 A360 f15
g1 A370 f6
M99

g0 z.2

M5 M9
M30