A machining center comprising a tool spindle, a tool magazine, a tool shuttle assembly for transferring tools between the tool spindle and the tool magazine including rail means, a tool change mechanism including a carriage, means for mounting the carriage on the rail means for displacement therealong, a dynamically brakeable motor for driving the tool change mechanism along the rail means in a selected direction, means for stopping the tool change mechanism driven in the selected direction including first proximity switch means secured to the carriage at a selected spacing from the rail means for maintaining the condition of the proximity switch means as the carriage is displaced along the rail means, opening means in the rail means at a selected location for changing the condition of the first proximity switch means as the carriage means is displaced in the selected direction along the rail means, second proximity switch means secured to the rail means, the tool change mechanism including a projecting element for changing the condition of the second proximity switch means from a first condition to a second condition as the tool change mechanism is displaced therealong, the projecting element being selectively located and the opening being selectively configured so that the first and second proximity switches will simultaneously have the second condition when the tool change mechanism is at the predetermined position.
A machine tool comprising a machining spindle, a device for inserting an auxiliary unit into the machining spindle, a tool magazine for providing a multitude of tools and a tool changer comprising at least one tool gripper for holding tools for the machining spindle for the transportation of tools between the tool magazine and an exchange position at the machining spindle. To ensure an automatic supply to the machining spindle as well as to the auxiliary unit in a simple and fast way the tool changer has at least one additional tool gripper for holding tools for the auxiliary unit.
