MOTOR SPINDLE WITH IMPROVED MACHINING PRECISION AND METHOD FOR OPERATING ONE SUCH MOTOR SPINDLE

摘要

The invention relates to a motor spindle (1), comprising a spindle shaft (4) for receiving a tool (14). Said spindle shaft (4) is accommodated in the housing (2) of the motor spindle (1) in a fixed bearing (5) and a loose bearing (6). The received tool enters into contact with the machined workpiece (15) in a tool interface (16) when the spindle shaft is driven and the tool interface (16) is displaced in an axial direction of the spindle shaft (4) when a workpiece is machined. A displacement sensor (19) is provided on the spindle bearing in order to determine the axial displacement of the tool interface (16). The invention also relates to a motor spindle (27) comprising a spindle shaft (28) for receiving a tool (32). The spindle shaft (28) is accommodated in the housing (29) of the motor spindle (27) in a fixed bearing (30) and in a loose bearing (31) with an axially displaceable bearing bushing (38). The tool (32) enters into contact with the machined workpiece at the tool interface when the spindle shaft is driven, and an adjusting element which is used to adjust the axial displacement of the bearing bushing (38) of the motor spindle (27) is also provided.