Machine tool

A machine tool comprising:

• a machine tool body including:
• a spindle device having a spindle to be rotationally driven while holding a workpiece or a tool;
• a feed device changing a positional relationship between the workpiece and the tool;
• and
• a machining auxiliary device assisting machining of the workpiece by the tool;
• an additional device attached to the machine tool body and configured to perform a predetermined operation accompanying the machining of the workpiece;
• a controller configured to operationally control the spindle device, feed device, and machining auxiliary device of the machine tool body and operationally control the additional device;
• a main operation panel having a machine running operation unit for operating the machine tool body and the additional device by automatic operation based on a Numerical Control (NC) program or by manual operation and configured to input an operation signal of the machine running operation unit to the controller;
• and
• a sub-operation panel having a device operation unit for operating the additional device by manual operation and configured to input an operation signal of the device operation unit to the controller,
• wherein:
• the sub-operation panel further has an abnormality avoidance operation unit for causing the machine tool body to perform an abnormality avoidance operation for avoiding a predetermined abnormality occurred in the machine tool body and is configured to input an operation signal of the abnormality avoidance operation unit to the controller;
• and
• the controller is configured to be able to, when receiving the operation signal of the abnormality avoidance operation unit from the sub-operation panel during the automatic operation based on the NC program, implement the abnormality avoidance operation by changing an operational status of at least one of the spindle device, feed device, and machining auxiliary device in accordance with the operation signal of the abnormality avoidance operation unit without powering off the machine tool.