Abstract: Provided are a display device, a computer program, and a storage medium that make it possible to increase visibility of a tool path. This display device comprises: an oscillation condition setting unit that sets oscillation conditions for oscillation cutting in which a workpiece and a tool are oscillated relative to each other; a tool path information generation unit that generates tool path information related to a tool path on the basis of the oscillation conditions; a determination unit that determines an actual cut portion and an air cut portion on the tool path on the basis of the tool path information; and a display control unit that controls a display unit to display thereon the tool path in which the actual cut portion and the air cut portion on the tool path are displayed in different manners.

Abstract: A numerical controller configured for simultaneous control such as to cut a workpiece in order in the direction of a rotary axis by a plurality of tools, in a machine having a plurality of cutter holders fitted individually with the tools and capable of lathe turning, generates movement command data for locating the plurality of tools so as to cut the workpiece with the same depth of cut and controlling respective relative speeds and relative positions of the plurality of tools so that respective cutting points of the tools move back and forth in order; generates interpolation data based on the movement command data; and controls a motor for driving the machine, based on the interpolation data.

Abstract: A numerical controller configured for simultaneous control such as to cut a workpiece in order in the direction of a rotary axis by a plurality of tools, in a machine having a plurality of cutter holders fitted individually with the tools and capable of lathe turning, generates movement command data for locating the plurality of tools so as to cut the workpiece with the same depth of cut and controlling respective relative speeds and relative positions of the plurality of tools so that respective cutting points of the tools move back and forth in order; generates interpolation data based on the movement command data; and controls a motor for driving the machine, based on the interpolation data.

Abstract: A numerical controller includes a division setting unit which sets division information for dividing a machining region into a plurality of areas, an area division unit which divides a machining region into a plurality of areas based on division information, a program division unit which generates divided programs respectively used for machining control in the areas, an area coordinate system setting unit which sets a virtual coordinate system in the plurality of areas, and an operation precision setting unit which sets operation precision, and performs internal operation for controlling an operation of a machine in accordance with the virtual coordinate system and the operation precision to control each axis of the machine.

Abstract: A numerical controller includes a division setting unit which sets division information for dividing a machining region into a plurality of areas, an area division unit which divides a machining region into a plurality of areas based on division information, a program division unit which generates divided programs respectively used for machining control in the areas, an area coordinate system setting unit which sets a virtual coordinate system in the plurality of areas, and an operation precision setting unit which sets operation precision, and performs internal operation for controlling an operation of a machine in accordance with the virtual coordinate system and the operation precision to control each axis of the machine.

Abstract: A screen assembly and a rear-projection type graphic display device are provided to block overscanned light Lo projected outside a fresnel lens screen. The screen assembly 20A includes the fresnel lens screen 21, a screen retainer 22 and a light blocking member 23. The fresnel lens screen 21 forms an image on the side of a front surface 21b by image light Le incoming through a back surface 21a. The screen retainer 22 has a back surface 22a whose area is larger than the back surface 21a and the front surface 21b and which is opposed to the front surface 21b to hold it, and a front surface 22b located on opposite side of the back surface 22a to allow an image formed by the image light incoming through the back surface 21a to be visible through the front surface 22b. The screen retainer 22 has an optical transparency. The light blocking member 23 is arranged so as to surround respective side surfaces of the screen 21 in the form of a frame.

Abstract: A projection type display device includes a image displaying element having image display areas for displaying a plurality of images respectively, a projection optical system having an emitting part for emitting projection light flux to the image display areas of the image displaying element, and a plurality of screens for displaying projected images by the projection light flux transmitted through the image display areas of the image displaying element. In the projection type display device, the image display areas are formed in respective areas in the image displaying element independent of each other. The projected images on the screens correspond to the image display areas, respectively. Each of the screens is arranged in such a position that the each of the screens is not overlapped with shadows of the other screens which are produced since the projection light flux is emitted from the emitting part to the screens.

Abstract: A numerical controller that shortens time required for transferring control of a spindle between control systems. When the spindle control command is included, the command is carried out and information on designation of the spindle, commanded rotational velocity and direction is stored in a case of a velocity control mode, and information on designation of the spindle, commanded rotational position and velocity is stored in a case of a position control mode. When a command to cancel the control of spindle is read, the control of the designated spindle and also the stored information on the control status of the spindle are transferred to the other control system. A command to acquire the control of the spindle is read in a machining program for the other control system, the control of the designated spindle is started by the other control system according to the transferred control status of the spindle.

Abstract: A screen assembly and a rear-projection type graphic display device are provided to block overscanned light Lo projected outside a fresnel lens screen. The screen assembly 20A includes the fresnel lens screen 21, a screen retainer 22 and a light blocking member 23. The fresnel lens screen 21 forms an image on the side of a front surface 21b by image light Le incoming through a back surface 21a. The screen retainer 22 has a back surface 22a whose area is larger than the back surface 21a and the front surface 21b and which is opposed to the front surface 21b to hold it, and a front surface 22b located on opposite side of the back surface 22a to allow an image formed by the image light incoming through the back surface 21a to be visible through the front surface 22b. The screen retainer 22 has an optical transparency. The light blocking member 23 is arranged so as to surround respective side surfaces of the screen 21 in the form of a frame.

Abstract: A magnetic recording device includes a write head, a perpendicular magnetic recording medium, a recording-current generating circuit, and a setting circuit. The perpendicular magnetic recording medium includes a plurality of tracks that includes a recording track. The recording-current generating circuit generates a recording electric current. The write head supplied with the recording current writes a recording data pattern on the recording track. The setting circuit sets a value of the recording electric current such that the value of the recording electric current decreases as a magnitude of side erase effect on at least one track of the tracks adjacent to the recording track increases.

Abstract: A projection type display device includes a image displaying element 20 having image display areas 20a, 20b for displaying a plurality of images respectively, a projection optical system 30A having an emitting part for emitting projection light flux to the image display areas 20a, 20b of the image displaying element 20, and a plurality of screens for displaying projected images by the projection light flux transmitted through the image display areas 20a, 20b of the image displaying element 20. In the projection type display device, the image display areas are formed in respective areas in the image displaying element independent of each other. The projected images on the screens correspond to the image display areas, respectively. Each of the screens is arranged in such a position that the each of the screens is not overlapped with shadows of the other screens which are produced since the projection light flux is emitted from the emitting part to the screens.

Abstract: A numerical controller capable of shortening time required for transferring control of a spindle between different control systems. It is determined whether or not a spindle control command is included in a machining program for one control system. If the spindle control command is included, the command is carried out and information on designation of the spindle and commanded rotational velocity and direction is stored in a case of a velocity control mode, and information on designation of the spindle and commanded rotational position and velocity is stored in a case of a position control mode. When a command to cancel the control of spindle is read, the control of the designated spindle and also the stored information on the control status of the spindle are transferred to the other control system.

Abstract: A numerical controller which has a plurality of command systems and controls a machine having a plurality of spindles, and in which a program can be prepared without taking account of the correspondence between the command systems and the spindles. The numerical controller has n number of command systems and controls a machine tool or the like that has n number of spindles and a required number of other axes. A signal indicative of the correspondence between each command system and a spindle is inputted from external signal input means to a selecting/switching section. The selecting/switching section selects, among the spindles 1 to n, a spindle of a destination such as a command S1 for spindle control outputted by each command system in response to the input signal by software processing. The position of a tool or a workpiece to be machined can be changed in accordance with a change of the correspondence between the command systems and the spindles.

Abstract: A specified-data saving means saves a data specified by a data name from a battery-backed-up volatile memory to a nonvolatile memory not requiring battery backup. At the same time, a generation management means stores the data name and time information in the nonvolatile memory, together with the saved data. An individual-data restoring means selects data from among the data stored in the nonvolatile memory based on a specified data name and time information and restores the selected data to the volatile memory.

Abstract: A numerical controller capable of quickly sending/receiving data of a machining program to/from a storage device or medium and quickly editing the data of the machining program. The machining program is divided into a plurality of program blocks and additional information is added to each of the program blocks to be associated therewith to form input/output units. The additional information includes front and rear link data designating input/output units immediately preceding and following each input/output unit, respectively, in a sequence of the machining program, and data of an effective character length of the program block. In executing the machining program while reading the machining program stored in the storage device or medium, the input/output units are successively read and executed according to the front/rear link data.

Abstract: A computerized numerical control apparatus for switching an acceleration constant for acceleration/deceleration prior to interpolation in accordance with the kind of an axis, in which an acceleration/deceleration prior to interpolation unit subjects a feed speed to an acceleration/deceleration process based on an acceleration constant designated by an acceleration constant switching unit. The feed speed subjected to the acceleration/deceleration process is transferred to an interpolation unit. The interpolation unit determines distribution pulses X.sub.p, Y.sub.p, Z.sub.p based on the speed data and movement data thereof. The distribution pulses are applied to an X-axis control unit and the like, respectively, and output to the respective axis motors M.sub.x and the like to execute the drive control thereof.

Abstract: A three-dimensional coordinate transformation control system controls three-dimensional coordinate transformation in a computerized numerical control apparatus for controlling a machine tool having a plurality of heads. A pre-processing calculating unit (2) decodes a machining program (1), effects three-dimensional coordinate transformation for only a first head in a three-dimensional coordinate transforming unit (3), and distributes pulses based on transformed coordinates to a pulse distributing unit (4). For a second head, the coordinates for the first head are used as they are, and pulses based on the coordinates are distributed by a pulse distributing unit (5). The three-dimensional coordinate transformation is therefore calculated by a reduced number of times, and the burden on the computerized numerical control apparatus for calculations is reduced.

Abstract: A spindle control command method is provided for controlling a plurality of spindless by a single numerical control device (CNC), and switching between individual control and synchronous control of a plurality of spindles (1, 3) is effected by a program command (9). Namely, whether the spindles (1, 3) should be controlled individually or synchronously is commanded by an NC program (9), and the CNC carries out switching to the individual spindle control or to the synchronous spindle control in accordance with the command given.