Most CAM software stops where Macro B begins. When you need a CNC to think — make a decision based on a measured value, run a family of parts from one parametric program, drive an on-machine probing routine — you’re writing Fanuc Macro B by hand. It’s one of the most valuable and least common skills on the floor. Fanuc Macro B programming services give you that expertise without hunting for a unicorn hire.

What Macro B unlocks that CAM can’t

Macro B is parametric G-code: variables, math, logic, loops, and conditional branching inside the program. That turns a static toolpath into something adaptive:

• Custom canned cycles tailored to a feature you run constantly, callable like a built-in cycle.
• On-machine probing — measure a surface, then offset or branch based on the result.
• Families of parts from one program driven by a handful of variables instead of dozens of separate programs.
• Logic and decision-making — skip operations, adapt depths, respond to conditions.
• Tool-life and counting routines built into the program.

We write it for your control

Macro B varies by control generation and by what system variables your machine exposes. We write to your specific Fanuc control so the macros read the right offsets, probe inputs, and tool data — not a generic example that throws alarms on your iron. A bad macro is worse than no macro, which is exactly why this is senior-level work. It pairs naturally with post processor customization when the goal is squeezing every second out of a job.

When to bring in Macro B support

• You run a high-mix family of parts and want one parametric program instead of fifty.
• You’re adding on-machine probing and need the logic written around it.
• A repetitive feature would be faster as a custom cycle.
• Nobody in-house writes macros and your CAM can’t do what you need.

Frequently asked questions

Does Macro B work on Haas or other controls?

Haas uses a very similar macro language, and other controls have parametric equivalents (Okuma, Heidenhain). Tell us your control and we’ll write to its dialect.

What do you need to write a macro?

Your control model, what you want the program to do, and which offsets/probe inputs are involved. A sample of an existing program helps us match your conventions.