I ran the attached CNC code on the Haas VF-2 to add 37 tapped 1/4-20 holes with 1" spacing (a breadboard hole pattern) to a 10" CF Flange. I added a 0.0156" deep groove for venting so that we can cover a hole and not have a virtual leak.

The "pipeline" was to design the part in SolidWorks (CAD), give some CAM commands (tell it what holes to drill, how deep, etc), then "post" the G Code. I then copy the G Code into .txt file adn import it into the python script. This python script adds a custom cycle call (M97) to remove chips and allow me to visually confirm this. I then copy the code's output into a new .nc file. I then add the custom cycles at the bottom of the code. I can then read this G Code in the Haas.

I attached the flange the same as this post. Because the part and tool are flooded with coolant, the masking tape didn't do a great job at holding the flange to the knife edge and some chips got under the copper gasket. Luckily, these chips did not scratch the knife edge. I think the flange helped.

I used the 4 following tools: this #4 Cobalt Steel drill bit with a TiN coating, a 3/8" diameter 90° chamfer tool, this 1/4-20 steel bottom tap with 3 flutes and a black oxide coating, and a 1/8" diameter carbide end mill with 4 flutes and a TiAlN coating.

The tools did not appear to be too worn out after this cycle. There is a bit of wear on the tap and end mill, possibly due to earlier use.

After machining, I carefully removed the chips and used a stone and WD 40 to remove burrs from end mill.

I am going to machine another flange tomorrow and clean these Friday so that they can be baked out over the weekend.