With high demands on accuracy and dynamics, the base frame in welded construction or hard stone is also a possible and reasonable part of the scope of supply. Here, all axes are specified, assembled, aligned, measured, tested and recorded - according to desired specifications. By means of hard stone, the required accuracies can be achieved. Hard stone offers all the characteristics required - ranging from a small coefficient of expansion, high abrasion resistance, optimum vibration damping, absence of unwanted residual stresses up to the necessary accuracies regarding flatness, parallelisms and angularity.