G-code to engrave numbers on cylinders

I am pretty sure that you could write a G-code sub to carve sequential alphanumeric strings as serial numbers.
I thought you wanted to carve arbitrary strings. In that scenario the hard part is passing the strings to the G-code.

Boltonbrass wrote:

Andy you are my savior. All I need is Bolton Brass engraved on a 1/2" round piece of brass with a single letter or number below it.

This might not be too hard, you only need a few extra letters (B,o,l,t,n,r,a,s)

But: The point of this routine was to generate the numbers on-the-fly for scale rings of various types (0-360, -180-180, 0-10. 0-25 etc)
For engraving the same words many times it is probably sensible just to use a CAM system like Fusion360 to create the G-code once :

If you want to use this G-code, then it might help to explain how it works.
Each number is created by joining points on two octagons. (generally). I worked out the coordinates of the required points, typed them in (probably in Excel) and then formed them in to the subroutines (again, probably using Excel, but it was quite a while ago)

This is the number 8
The factors #41 and #42 are used to scale in the A and X directions. Here are the points plotted in Excel:



You would Need to create the letters you need in the same way, and form them into a subroutine looking like the existing digits.
I would suggest using ASCII to name the subroutines:

B = 66
o = 111
l = 108
t = 116
n = 110
r = 114
a = 97
s = 115

. Please tell me you make money doing this......

I actively avoid making money from this. It's important to me to keep it a hobby.

I have modified the code to also do the tick marks.

Try just changing #<_inc> to 28.8 degrees (and see what the preview looks like)
That's 360 / 12.5 though it sounds a bit too large without testing, and I don't know what it will do at 120.
(Sorry, not at a LinuxCNC machine at the moment to test it)