Abstract: A method checks a focus position of a laser beam in relation to a workpiece. The method includes: focusing the laser beam at a plurality of positions along a trajectory on the workpiece; detecting radiation generated during an interaction of the laser beam with the workpiece at a respective position of the positions; determining signal values corresponding to the detected radiation at the respective position; and checking the focus position at at least one of the positions by comparing the respective one of the signal values at the respective position with a reference value formed from the signal values.

Abstract: A method for controlling a laser processing machine includes providing the laser processing machine. The laser processing machine includes a laser source, a process optical unit, and a control device. The method further includes creating redundant data of the laser source and of the process optical unit, transferring the redundant data of the laser source and of the process optical unit to the control device by data streaming, and comparing the redundant data of the laser source and of the process optical unit.

Abstract: A method checks a focus position of a laser beam in relation to a workpiece. The method includes: focusing the laser beam at a plurality of positions along a trajectory on the workpiece; detecting radiation generated during an interaction of the laser beam with the workpiece at a respective position of the positions; determining signal values corresponding to the detected radiation at the respective position; and checking the focus position at at least one of the positions by comparing the respective one of the signal values at the respective position with a reference value formed from the signal values.