Yes, CNC 5-axis machines are often categorized into "true 5-axis" and "fake 5-axis" (or "3+2 axis") systems, based on their ability to coordinate axis movements. This distinction is critical because it directly impacts a machine’s capability to handle complex geometries and its overall efficiency.  

True 5-axis machining refers to systems where all five axes (three linear: X, Y, Z; two rotational: typically A, B, or C) can move simultaneously. This simultaneous motion allows the cutting tool to maintain an optimal angle relative to the workpiece at all times, even as the part or tool rotates. For example, when machining a curved surface like a turbine blade, the spindle can tilt and rotate in real time to follow the contour, ensuring consistent cutting conditions and a smooth finish. True 5-axis machines excel at producing parts with complex, non-linear geometries, such as impellers, medical implants, or aerospace components, where continuous adjustment of the toolpath is necessary. They require advanced CAM software to generate synchronized toolpaths and sophisticated controllers to prevent collisions between the tool, workpiece, and machine structure.  

In contrast, "fake 5-axis" or 3+2 axis machining is a hybrid approach where the rotational axes (A and B/C) are used to position the workpiece or spindle at a fixed angle, after which machining occurs only along the three linear axes (X, Y, Z). This means the rotational axes do not move during the cutting process; instead, they lock into a predefined orientation to access a specific feature, such as an undercut or angled hole. For instance, to machine a hole at a 45-degree angle, the table rotates to 45 degrees, locks in place, and the drill operates along the linear axes. While 3+2 axis machining is simpler and less expensive than true 5-axis, it is limited to parts that can be divided into multiple fixed-angle setups. It is slower for complex parts because each orientation requires a separate setup, and it may leave visible seams or inaccuracies between setups.  

The key difference lies in simultaneity: true 5-axis systems offer continuous, coordinated motion, while 3+2 axis systems use discrete, fixed positions. True 5-axis is ideal for high-complexity parts where precision and surface quality are critical, but it comes with a higher cost and requires more skilled operators. 3+2 axis, on the other hand, is more affordable and easier to program, making it suitable for parts with moderate complexity or when budget constraints exist.  

Manufacturers must choose between the two based on their specific needs: true 5-axis for intricate, organic shapes and 3+2 axis for simpler, multi-angle parts. Misunderstanding this distinction can lead to inefficiencies, as using a 3+2 axis machine for a true 5-axis job would result in longer lead times and compromised quality.