A method for control of a drive for a tool or workpiece uses pilot control and a device with a control apparatus, the pilot control taking place depending on a frequency of movement. At least one of a frequency component of the reference value, a spectrum of the reference value, and a part thereof is used as the frequency of movement. At least one pilot factor is determined depending on the frequency of movement, and the at least one determined pilot factor, multiplied with a pilot value that corresponds to or is a derivative of the reference variable is used for pilot control. In this way, a contouring error can be advantageously reduced.

A separative high-pressure cooling and lubrication method is provided. The method includes: S1: apply ultrasonic vibration on the cutting tool on a machine tool; S2: deliver high-pressure cutting fluid to a jet nozzle so as to spray the high-pressure cutting fluid to the cutting zone of the ongoing process. The method also includes: S3: set cutting parameters and ultrasonic vibration parameters to adjust the separation amount between the cutting tool and workpiece, and adjust the pressure of the high-pressure cutting fluid; S4: when the cutting tool and the workpiece separate completely with each other periodically, the high-pressure cutting fluid enters and flows through the interior of cutting zone, forming liquid film on the surfaces of the cutting tool and the workpiece. In step S4, the cutting tool and the workpiece and cooled, and liquid film is formed on the surfaces of the cutting tool and the workpiece.

The present invention relates to a method for machining a blank (10) by means of a tool (12) for producing a finished part, wherein the tool (12) is moved during the machining on a guide path (14) comprising at least three successive path segments (16, 18, 20; 16-1, 18-1, 20-1; 16-2, 18-2, 20-2; 18) in the form of two machining segments (16, 20; 16-1, 20-1; 16-2, 20-2) and one connecting segment (18; 18-1; 18-2; 18), which connects the two machining segments (16, 20; 16-1, 20-1; 16-2, 20-2) to one another, and wherein the connecting segment (18; 18-1; 18-2; 18) of the path segments (16, 18, 20; 16-1, 18-1, 20-1; 16-2, 18-2, 20-2; 18), which connecting segment connects the two machining segments (16, 20; 16-1, 20-1; 16-2, 20-2), is determined in terms of its shape by the forward feed (F1) of the tool (12) at the end (24) of the first machining segment (16) and by the forward feed (F2) of the tool (12) at the start (30) of the second machining segment (20).