Understanding the three-axis, four-axis, and five-axis configurations of CNC engraving machine kits5-axis: XYZAB, XYZAC, XYZBC (the spindle can rotate approximately 180° to the left and right)4-axis: XYZA, XYZB, XYZC (4-axis interpolation)4th axis: YZA, XZA (4-axis interpolation)3-axis: XYZ (3-axis