The vertical alignment with the spindle means that metal chips can accumulate to the surface on the workpiece and must be cleared. In terms of machining centers, there are various different types of machine centers that cater to distinctive manufacturing desires. One particular popular form is definitely the Vertical Machining Center (VMC), https://www.sedlacek-t.cz/obrabeci-centrum-haas-ec-400-spolehlivost-a-presnost-pro-vas-provoz/