Fanuc Corporation

Yasushi Takeuchi

Takahiko Endo

Akira Kanemaru

Takahiro Haraguchi

Motohiko Ito

Makoto Suzuki

Kouhei Irie

Yoshifumi Wake

A numerical controller controls a position of a control axis in synchronization with a reference value by using tabular data. When the numerical controller sequentially reads a command block from the tabular data and analyzes the command block so as to acquire a reference value and a coordinate value of a control point, the numerical controller outputs a reference value of the control point, which is shifted based on a shift amount specified by a shift command, in command blocks subsequent to the command block which includes the shift command, in a case where the shift command for shifting a reference value is included in the read command block.

Numerical controller operating based on tabular data

A numerical controller drives motors for respective axes of a machine tool by using an NC program and table-format data that command positions of those axes with reference to a position of a reference axis. The numerical controller generates, based on a movement command commanded by the NC program, interpolation data for an axis to be controlled by the movement command, generates, based on the table-format data, interpolation data for an axis to be controlled by the table-format data, and further generates interpolation data obtained by selection from or superposition of these two pieces of interpolation data.

Numerical controller executing operation by a movement command and table-format data

A numerical controller performs cross-rail axis control that distributes moving amount to a first and second axes based on a command to a virtual axis. If a block of a program that is read out contains a fast feed command to the virtual axis for moving a tool to a cutting feed start point, the numerical controller distributes a moving amount commanded by the fast feed command to the first axis and the second axis. Further, the moving amount commanded by the fast feed command is distributed to the first axis and the second axis so that movement of the virtual axis commanded by a cutting feed command that follows the fast feed command in the program can be achieved by movement of only the first axis.

Numerical controller for performing axis control of two parallel axes

When a command for outputting a movement amount at a specific reference value is included in a command block, a numerical controller which controls a position of a control axis in synchronization with a reference value by using tabular data registers the reference value and the movement amount of the command in a shift table while associating the reference value with the movement amount. Then, when the current reference value reaches the reference value registered in the shift table, the numerical controller superposes the movement amount of the control axis that is associated with the reference value in the shift table on a distributed movement amount to the control axis, and outputs the superposed movement amount as a movement amount of the control axis.

A numerical controller configured for operation based on tabular data identifies a control command, calculates an operating time to achieve a target state for the control command, determines a time, an axis position, or a spindle position, which serves as a reference for the start of the operation, and starts the operation.

Numerical controller configured for operation based on tabular data

A numerical controller has a first axis (reference axis) and a second axis (superimposed axis), and performs superimposed control which superimposes a movement amount of the reference axis on a movement amount of the superimposed axis, and thereby controls the movement of the superimposed axis. The numerical controller controls an acceleration start time of the axis to be accelerated, in a superimposition interval in which the reference axis is accelerated and the superimposed axis is decelerated (or reference axis is decelerated and superimposed axis is accelerated). After the axis to be decelerated is sufficiently decelerated, the axis to be accelerated is accelerated, and a moving speed of the superimposed axis does not exceed a speed limit of a machine in an acceleration/deceleration interval.

Numerical controller having function of controlling speed by superimposed control

Positions to be synchronized with a reference value are stored as command data in table format. Velocity changing points of a tool path designated by the table format data are calculated. Two intersection points between the tool path and a circle or a sphere having a designated radius and centered on the velocity changing point are connected by a smooth curved tool path according to a multidimensional function or the like. In this way, the table format data is corrected.

Numerical controller for smoothing tool path in operation based on table format data

A numerical controller using table format data, the numerical controller including a memory which stores table format data, in which time or a position of a spindle or feed shaft serving as a reference is arranged so as to correspond to a position of a spindle or feed shaft other than the spindle or feed shaft of which position serves as a reference or an output of an auxiliary function, a reference value counter which inputs the time or the position of the spindle or feed shaft serving as a reference, wherein the position of the spindle or feed shaft other than the spindle or feed shaft of which position serves as a reference or the output of the auxiliary function is controlled.

Numerical controller having function of operation based on table format data

A memory other than a non-volatile memory in a numerical controller is divided into a plurality of memory areas in response to a command from a computer connected to the numerical controller. Whether a machining program has been stored in each of the divided memory areas is decided before a machining program stored on a hard disk in the computer is transferred to the memory other than the non-volatile memory. The machining program stored on the hard disk is then written to an area for which it is determined that no machining program is stored.

Numerical controller capable of dividing and combining memory areas to store machining programs and binary data

A numerical controller including a storage device for storing tabular data configured to operate one arbitrary axis, in which a position of a spindle or an axis as a control object is caused to correspond to a reference value composed of time or the position of a reference spindle or axis. A reading device is provided for successively reading a reference value in the tabular data and a position of the spindle or the axis as control object corresponding to the reference value from the storage device, and controls the position of the spindle or the axis as control object based on the reference value read by the reading device. An assignment device is provided for assigning the axis to be operated in accordance with the tabular data, and a starting device for starting the tabular data stored in the storage device, thereby causing the axis assigned by the assigning device to operate.

Numerical controller with tabular data for operating arbitrary axes

A path table operation is performed while updating the reference positions. When a read-out command in the path cycle table is read out, the reference positions are withdrawn and reset, and the respective axial positions at the time of the initiation of the path cycle command are stored. From the next period, the target positions are determined by adding the positions at the time of initiation to the respective axial positions corresponding to the reference positions stored in the path cycle table, and a path table operation is performed. A single path cycle table is sufficient for storing commands for portions to be repeatedly worked.

Numerical controller

A numerical controller capable of performing path-table operations in a plurality of systems individually or synchronously, such that during a path-table operation in one system, a path-table operation or an operation according to NC statements can be selectively performed in another system. The plurality of systems are provided with their respective reference variables. It is selected whether the reference variable is set common or specific to each of the plurality of systems. During a path-table operation in one system, it is possible to command a path-table operation in another system to start a path-table operation thereof or to perform waiting of path-table operations in the plurality of systems. If the reference variable is set in common for all systems, path-table operations can be performed synchronously, and if the reference variable is set specific to each of the plurality of systems, path-table operations can be performed individually.

A numerical controller capable of operating an auxiliary function at a target time or spindle position in performing operation based on table format data. An auxiliary function table is stored with auxiliary function commands M to be outputted corresponding to commanded reference times Lc and their corresponding operation delay times D. A reference time L is updated based in accordance with an override value. An auxiliary function command M and its corresponding operation delay time D are read from the auxiliary function table. The delay time D is corrected with the override value, and a reference time prior to a commanded reference time Lc by a margin equivalent to the corrected delay time is set as a command time Lr. If an override is entered, the delay time is corrected for the override amount and modified into an overridden reference time unit, and a command time for an auxiliary function is obtained and outputted based on the reference time unit. Thus, the auxiliary function is performed appropriately at a commanded value Lc of the reference time.

A numerical controller capable of mitigating mechanical shock caused by tool compensation while a machine tool is operated according to table data. X- and Z-axis path tables Tx, Tz store X- and Z-axis positions corresponding to reference positions (time or spindle position). A tool compensation table Tt stores X- and Z-axis compensation amounts (tool compensation numbers) associated with the respective reference positions. At every predetermined period, X- and Z-axis path table interpolators read command positions from the path tables Tx, Tz based on the reference position, and obtain command motion amounts by interpolation. X- and Z-axis tool interpolators read compensation amounts from the tool compensation table Tt based on the reference position, and obtain compensation motion amounts by interpolation. Adders add up the command motion amounts and the respective compensation motion amounts to drive respective motors. The tool compensation amounts are gradually varied, whereby mechanical shock does not occur.

A numerical controller which, after once stopping a slave axis during superposing control, can easily resume the superposing control. In the superposing control, a motion amount for a master axis and a motion amount for the slave axis are added to a workpiece coordinate value of the master axis and a workpiece coordinate value of the slave axis, respectively, to update their present position data (I, II). These motion amounts are supplied also to servo processing (I, II) for the master axis and the slave axis, where an amount obtained by superposing a motion amount &#x3b4;zIm for the master axis ZIm on a motion amount &#x3b4;zIIs for the slave axis ZIIs is supplied to the servo processing for the slave axis ZIIs. When a slave axis motion stop command is issued, the motion of the slave axis is stopped and a motion amount &#x3b4;zIm for the master axis ZIm is subtracted from the workpiece coordinate value of the slave axis ZIIs. This makes it possible to retain the positional relationship between the master axis and the slave axis, and hence easily resume the superposing control when the motion of the slave axis is restarted.

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Minamitsuru-gun, Japan

Yasushi Takeuchi