The vertical alignment of the spindle ensures that metal chips can accumulate to the floor with the workpiece and have to be cleared. Linear, rotary and angle encoders can be utilized with servo motors as well as other systems to reduce glitches by examining the machine is going as expected. https://www.sedlacek-t.cz/obrabeci-centrum-haas-ec-400-spolehlivost-a-presnost-pro-vas-provoz/