an upper beam and a lower beam, wherein the upper beam is movable in a direction of a primary axis (y) of the bending machine relative to the lower beam in order to form a workpiece which can be inserted between the upper beam and the lower beam via a front side of the bending machine by bending along a bending line, wherein the bending line extends in a width direction (z) of the bending machine,

wherein the bending machine includes at least one position measuring system for measuring and monitoring a respective position of the upper beam with respect to a reference position during a working process,

wherein the at least one position measuring system is configured in such a way that a linearly movable measuring unit of the at least one position measuring system follows a movement of the upper beam in the direction of the primary axis (y) and in the working process moves along a stationary linear element,

wherein the linearly movable measuring unit of the at least one position measuring system is held on the upper beam by a connecting element, wherein the connecting element is resistant to deformation in the direction of the primary axis (y), configured to be spring-elastic in the width direction (z) of the bending machine and/or a depth direction (x).