Spindel-Antriebsvorrichtung für eine Werkzeugmaschine.

摘要

The invention relates to a spindle drive controller for a machine tool such as a numerically controlled lathe of the two spindle type. According to the invention, a drive control unit is enabled to separately control the spindles (1, 1a) or jointly control both spindles (1, 1a) simultaneously. A switchover unit (24, 21) controls whether one or both spindles (1, 1a) is controlled and change-over units (22, 23) are provided for selectively feeding back speed and position feedback signals from one or the other of the respective spindles (1, 1a) depending on which spindle (1, 1a) is being driven at that time.