A method for operating a gear cutting machine comprising the following steps: machining a first workpiece (1) in the machine, wherein the first workpiece (1) heats up due to the machining, determining at least one characteristic workpiece variable in the first workpiece (1) in the heated state, wherein a measuring device of the machine is used for the determination, determining a compensation on the basis of the at least one characteristic workpiece variable of the first workpiece (1) and at least one characteristic workpiece variable of a reference workpiece, wherein the characteristic workpiece variable of the reference workpiece is determined in the machine after a steady-state temperature has been reached, at least one compensation value is determined in the course of determining the compensation, adjusting of the machine setting by taking into account the at least one compensation value, and machining a further workpiece (2) in the machine.

A method for operating a gear cutting machine comprising the following steps: machining a first workpiece (1) in the machine, wherein the first workpiece (1) heats up due to the machining, determining at least one characteristic workpiece variable in the first workpiece (1) in the heated state, wherein a measuring device of the machine is used for the determination, determining a compensation on the basis of the at least one characteristic workpiece variable of the first workpiece (1) and at least one characteristic workpiece variable of a reference workpiece, wherein the characteristic workpiece variable of the reference workpiece is determined in the machine after a steady-state temperature has been reached, at least one compensation value is determined in the course of determining the compensation, adjusting of the machine setting by taking into account the at least one compensation value, and machining a further workpiece (2) in the machine.

A turning controller includes a storage, a working program processing device, a command value setting processing device, an approach angle setting command amount calculator, and a command processing device. The storage is configured to store a working program and tool shape data. The working program processing device is configured to analyze the working program and to calculate and output command amounts. The command value setting processing device is configured to set an approach angle command value for defining an approach angle. The approach angle setting command amount calculator is configured to calculate, as an approach angle setting command amount, a B-axis command amount for controlling to cause the approach angle to have the approach angle command value based on the tool shape data. The command processing device is configured to output the approach angle setting command amount to the B-axis driver.