Fanuc Corporation

Tomomi Nakazato

Takashi Iwagaya

Hitoshi Matsuura

Takahiko Endo

A preventive maintenance management system and method, and a cell controller, for monitoring preventive maintenance data, calculating a residual period of time until which a component comes to the end of its life, and generating an appropriate maintenance schedule based thereon. The system has: a cell including machines and machine controllers, a cell controller communicably connected to each machine controller; and a supervisory computer communicably connected to the cell controller. The cell controller has: an analyzing part which detects a deterioration of the component and calculates the residual period of time when the deterioration is detected, based on the monitored preventive maintenance data; and an informing part which informs the supervisory computer of the calculated residual period of time along with an alarm. The supervisory computer has a maintenance scheduling part which generates or updates a maintenance schedule based on the informed residual period of time.

Preventive maintenance management system and method for generating maintenance schedule of machine, and cell controller

A numerical controller having a learning control function executes commands in an NC program, starts performing learning control from a location where the same operation pattern starts occurring, and stops performing learning control at a location where the same operation pattern ends. Once a command that allows learning control is established in the NC program, the section in which learning control is carried out can be automatically determined.

Numerical controller for carrying out learning control

A machine having X- and Y-axis linear moving axes and a pivot axis B for rotationally pivoting a pivot member having a tool arranged at a distal end thereof about an axis parallel to a Z axis is controlled. A moving command obtained by a command program commanded by a position expressed by X, Y, and Z in a three-dimensional orthogonal coordinate system is subjected to an interpolation process to calculate amounts of interpolation movement (&#x394;X, &#x394;Y, and &#x394;Z) of the respective orthogonal axes. An amount of rotation &#x394;&#x3b8; of the pivot axis required for moving the tool by the amount of movement &#x394;Y in the Y-axis direction is calculated. An amount of correction movement &#x3b4;x for canceling the movement in the X-axis direction caused by the rotation &#x394;&#x3b8; of the pivot axis B is calculated. Values (&#x394;X+&#x3b4;x), &#x394;&#x3b8;, and &#x394;Z are outputted to the X axis, the pivot axis B, and the Z axis, respectively.

Numerical control apparatus

A superimposing control method using a numerical control device, capable of starting and terminating a superimposing control even during movement, without the need of waiting for the adjustment of timing and without rapid acceleration or deceleration. In response to a superimposition command, a motion value distributed to a Z axis of a superimposing axis in a reference system is subjected to acceleration/deceleration processing by an acceleration/deceleration processing section separately provided for superimposition, and the obtained movement value is added to a motion command value for a Z axis of a superimposed axis in a superimposing system. When a superimposition termination command is issued, the motion command value remained in the acceleration/deceleration processing section for superimposition is superimposed on the motion command value for the Z axis of the superimposing system. The superimposition can be smoothly started and terminated without the need to stop the two control systems.

Growing community of inventors

Kawasaki, Japan

Tomomi Nakazato