A method for cutting a multiplicity of slices from a workpiece using a wire saw during a sequence of cut-off operations, which are divided into initial cuts and follow-on cuts, the wire saw comprising:
- a wire array of moving wire sections of a saw wire;
- and actuator, the wire array being tensioned in a plane between two wire guide rollers, each of the two wire guide rollers:
- being supported between a fixed bearing and a floating bearing, and comprising at least one chamber and a shell which encloses a core of the respective one of the wire guide rollers and which is structured with guide grooves for the wire sections, the method comprising:
- before each of the cut-off operations, determining a shape deviation by comparing an average shape profile of already cut-off slices with a reference shape profile;
- and
- during each of the cut-off operations, feeding the workpiece with the actuator, through the wire array along a feed direction perpendicular to a workpiece axis and perpendicular to the plane of the wire array in a presence of a working fluid and hard materials, which act abrasively on the workpiece, the feeding of the workpiece through the wire array further comprising:
- during each of the cut-off operations, while feeding the workpiece through the wire array, simultaneously changing a length of the shell of each of the two wire guide rollers by adjusting a temperature of the chamber of each of the wire guide rollers with a first cooling fluid in accordance with a specification of a first temperature profile, which specifies a temperature of the first cooling fluid in dependence on a depth of cut and which correlates with a first correction profile, which specifies a change in a length of the shell of each of the two wire guide rollers in dependence on the depth of cut;
- and
- during each of the cut-off operations, while feeding the workpiece through the wire array, simultaneously moving the workpiece along the workpiece axis in accordance with a specification of a second correction profile, which specifies a travel of the workpiece in dependence on the depth of cut,
- wherein the first correction profile and the second correction profile are determined based on the shape deviation for counteracting the shape deviation.