For precise geometric settings of the machine it is absolutely necessary to have the appropriate equipment. In respect of our customers' growing demands we have a very precise laser interferometer to measure the geometry of the machine, which enables measurements of displacements with a resolution up to 0.00001 mm (10nm) and an accuracy up to 0.0001mm / m (100 nm / m). It allows to perform the map of bolt errors, then to compensate these errors in the control system. The system also enables a very precise measurement of rectilinearity and perpendicularity of the machine axes, which allows to extend our offer for more accurate machines.