Wire saw wire with controllable pitch

Wire saw juxtaposed with two at a distance from one another parallel cylindrical guide rollers and at least one wire, wherein the two guide rollers along a portion of its circumference rotates in succession in the same direction at least once to form a wire array with one or more parallel wire portions between the diverting pulleys, wherein at least one auxiliary roller is arranged in contact with the wire frame, which is supported by a guide rollers to the parallel arranged to a support axis of rotation and which touches one, several or all of the parallel wire portions of the wire array, characterized, that by at least one of the auxiliary rolls, a tensile force and / or a compressive force to the wire box can be exerted.