Machine tool including viewing window controller

A machine tool including a viewing window attached to a splash guard or an opening/closing door, the viewing window for observation of a machining area, and a block plate provided inside the viewing window, the block plate for blocking the viewing window, the machine tool comprising:

• an actuator for driving the block plate to switch states between a state in which the machining area can be seen from outside the viewing window and a state in which the machining area cannot be seen from outside the viewing window;
• an operation mode determination unit for determining an operation mode of the machine tool at the time of start of operation by a machining program;
• and
• a controller for driving the actuator according to the determination result by the operation mode determination unit to control opening or closing operation of the block plate.

A machine tool including a viewing window attached to a splash guard or an opening/closing door, the viewing window for observation of a machining area, and a block plate provided inside the viewing window, the block plate for blocking the viewing window, the machine tool comprising:

• an actuator for driving the block plate to switch states between a state in which the machining area can be seen from outside the viewing window and a state in which the machining area cannot be seen from outside the viewing window;
• a block plate opening/closing setting unit for setting opening or closing of the block plate in advance;
• and
• a controller for driving the actuator according to the block plate opening/closing setting set in advance to the block plate opening/closing setting unit to control opening or closing operation of the block plate at the time of start of operation by a machining program.