The accuracy of milling centre geometry is a basic condition for successful application in practice. Users of modern centres have to deal with the issue of measuring accuracy using in the production program. The desired results are achieved by careful preparation both before and during adjustment operations. These rules apply to all applications for new machines, but also to machines after collision or after handling older machines. The geometrical accuracy of the machine begins at the design stage, when the emphasis must be placed on the precision of production of parts and groups with the precise assembly of new machines. Even the best adjustment or alignment of the machine is not valid if the company orders a poor quality machine that does not meet the required characteristics both in design and quality. Such a poorly selected machine guarantees frequent interventions by technicians to ensure at least the minimum required tolerance.