CNC machine programming

What the service includes

CNC machine programming is the preparation of the control program by which the machine performs the part's machining on its own. We take your drawing or 3D model and turn it into a tool path: we choose the machining strategy, the cutting modes, the entry and exit points — and deliver ready G-code for your specific machine and controller. You get not "advice on how to do it" but a file that loads into the machine and runs.

How CNC machining is set up

A CNC machine moves the cutting tool along three or more axes strictly by numerical commands — hence the name "computer numerical control". Each line of the program sets a movement, a feed and a spindle speed with an accuracy down to hundredths of a millimeter. The operator doesn't crank handwheels by hand: they load the program, set the workpiece and the part zero, and from there the code ensures repeatability. So the same program yields an identical part both the first time and the thousandth.

Where CNC machines came from

The first numerically controlled machine was built in 1952: the engineer John Parsons, together with the MIT Servomechanisms Laboratory, retrofitted a Cincinnati Hydrotel milling machine for punched-tape control and achieved automatic three-axis motion with an accuracy of about 0.025 mm. It was an answer to a problem of the aviation industry — precise, complex-shaped parts impossible to reproduce by hand. With the arrival of minicomputers in the 1960s–70s, numerical control became computer-based (CNC), and the machine began to store and execute programs on its own.

Why the program decides everything

On a CNC machine the precision of the part is the precision of the program. An error in a single coordinate or a wrong cutting mode turns into scrap, a broken tool or a ruined workpiece, and on expensive material that's direct money. That's why CNC machine programming isn't "drawing a contour" but engineering work: accounting for the part's rigidity, tool wear, lead-ins and lead-outs, and always verifying the program in simulation before the spindle touches the metal. A good program saves both material and the machine's service life.

What languages we program in

The base language is G-code (also known as the RS-274 standard): the controllers of most machines understand it. On top of it we write macros for Fanuc and Heidenhain controllers — this lets us create parametric programs where the part is described by formulas rather than hundreds of lines. For compact and hobby machines we work with GRBL and LinuxCNC, and for serial and non-standard parts we write our own control-program generators in Python. This set covers both a single part and a series.

When CNC programming languages appeared

The first specialized CNC language — APT (Automatically Programmed Tool) — was created at MIT in 1956 under the direction of Douglas Ross; it became a US standard in 1974 and an international one in 1978. G-code was born in the same MIT lab in the mid-1950s and was finally standardized as RS-274D in 1980 — and it still remains the main machine-control language. In other words, the industry has spoken these languages for over half a century, and they keep evolving along with the controllers.

Why you can trust this to us

The combined experience of our development team is more than 45 years in IT and programming. We approach the machine not as operators but as software engineers: for us a control program is code that has to be correct, verifiable and repeatable. That's why we always run the program in simulation and on a dry run before the production cut, document it and hand it over so your process engineer can maintain it themselves. CNC machine programming for us is the engineering of precision, not a set of random commands.