Numerical controller and numerical control system

A numerical controller configured to control maintenance of a machine tool, the numerical controller comprising:

• a mode shift part configured to shift an operation mode of the machine tool to a maintenance mode from a normal operation mode having first operation restriction contents, on a basis of input of a trigger for starting the maintenance of the machine tool, wherein the maintenance mode has second operation restriction contents different from the first operation restriction contents in the normal operation mode;
• an operation execution part configured to make the machine tool execute a maintenance operation on a basis of predetermined maintenance contents;
• and
• an output control part configured to control output of a result of the maintenance operation of the machine tool, as a maintenance result,
• wherein the mode shift part sets the second operation restriction contents included in the predetermined maintenance contents to the machine tool, and wherein when the maintenance result obtained by the operation execution part is determined to be within a range of normal values in comparison with the predetermined maintenance contents, the output control part controls the output of the maintenance result, and when the maintenance result is determined to be outside the range of normal values, the operation execution part determines whether the maintenance result is within the range of normal values after executing an operation to adjust a state of the machine tool, including any one of replacement of a component of the machine tool and change in the first operation restriction contents to be executed by the operation execution part in the normal operation mode,
• the mode shift part automatically returns the operation mode of the machine tool from the maintenance mode to the normal operation mode, when a predetermined time period elapses after the output of the maintenance result, and
• wherein the output control part is configured to calculate a date and time by use of past maintenance dates and times and information on maintenance intervals, for each maintenance type of a plurality of maintenance types, and control output of a notification when the output of the notification of the calculated maintenance date and time is necessary.