Patent ID: 7088064

Claim:
A method for the orientation of a spindle of a numerically controlled and rapidly rotating spindle by which said spindle is brought from an initial rotational speed into a predetermined position of rest, the method comprising: performing a first phase of orientation of said spindle by braking said spindle at a first braking rate function to a threshold rotational speed, wherein during said braking a switching over from a speed controller to a position controller is prepared, said switching over is performed at a switching time during a transition from said first phase of orientation to a second phase of orientation, said switching over is continuous in regard to position and/or rotational speed, and wherein a rotational speed of said spindle drops strictly monotonically during said switching over; and performing said second phase of orientation of said spindle so that a predetermined position of rest for said spindle is controlled by said position controller from said switching time until said predetermined position of rest of said spindle has been reached in said second phase at a position time, said second phase of orientation having a second braking rate function different than said first braking rate function.