An axis, in general, refers to any axis capable of linear or rotary motion; essentially, it represents the degrees of freedom of a machine tool. Machining centers come in 3-axis, 3+2-axis, and 5-axis configurations.
What are the differences between 3-axis, 3+2-axis, and 5-axis machining centers?
A 3-axis machining center uses linear feed axes X, Y, and Z for machining.
The key characteristic of a 3-axis machining center is that the cutting tool's direction remains constant throughout the entire cutting path.
A 3+2-axis machining center uses two rotary axes to first fix the cutting tool in an inclined position, and then the feed axes X, Y, and Z perform the machining.
The key characteristic of a 3+2-axis machining center is that the rotary axes always rotate to a position where the machining plane is perpendicular to the tool axis, and the machining plane remains fixed during machining.
A 5-axis machining center involves linear interpolation motion across any five axes: feed axes X, Y, and Z, and rotary axes A, B, and C around X, Y, and Z.
The characteristics of a 5-axis machining center: The tool direction can be optimized throughout the entire path of movement, while simultaneously performing linear tool movement. This maintains optimal cutting conditions throughout the entire path.
Theoretically, the more axes a machining center has, the higher its machining freedom and the greater its functionality. However, this does not mean that the more axes a machining center has, the better.
