Abstract: A machining process determination method in automatic programming for automatically creating NC data for a lathe. The method includes storing machining processes in a memory in a machining sequence, reading the previously stored machining processes out of the memory in order after entry of a blank profile (BP) and part profile (PF); automatically discriminating based on the blank profile and final part profile whether the read machining process is needed to obtain a final part; when it is not required, performing identical discrimination processing upon reading the next machining process out of the memory, and when it is required, determining a cutting domain (A1, A2, A3) and cutting direction of the machining process; and thereafter creating NC data upon reading subsequent machining processes out of the memory and performing identical processing.

Abstract: A color display method for a system having an automatic programming unit (101) equipped with a color display function, and an NC unit (102) which does not possess a color display function, wherein a correlation between a display item and a display color for an NC mode of operation is stored beforehand in a memory (105c) of a control unit (105). When a predetermined item display request key provided on an operator's panel (104) is pressed while in the NC mode, a control unit (105) informs the NC unit (102) of the name of the item for which display has been requested and applies color information, which corresponds to the item for which display has been requested, to a color display device (106). The NC unit applies item data, corresponding to the name of the item, to the color display device which displays the item data in a color designated by the color information applied thereto by the control unit (105).

Abstract: Magnesium hydroxide of a substantially spherical particle form having an average particle size of from 5 to 500 .mu.m and a specific surface area of from 25 to 1 m.sup.2 /g.

Abstract: A method and apparatus creates part program data by entering coordinates which specify points on a drawing placed on a tablet. The method includes entering coordinate values of points on the drawing by designating the points, and entering information for specifying the part program data to be created. The part program data is created using said information and the coordinates of the points. The part program data can be created simply in a short period of time without requiring special skills.

Abstract: Magnesium hydroxide of a fine plate-like particle form having an average particle size (d) of from 0.2 to 0.8 .mu.m as measured by a light transmission type liquid phase sedimentation method, wherein the proportion of particles having a particle size of d+0.5 .mu.m or larger is not higher than 50% by weight based on the weight of the total particles, and the particle thickness distribution is such that the proportion of particles having a thickness of 0.05 .mu.m or less is not higher than 5% by number and the proportion of particles having a thickness of 0.2 .mu.m or more is not higher than 20% by number.

Abstract: A process for producing highly pure magnesium hydroxide, which comprises reacting magnesium hydroxide starting material containing impurities, with an aqueous solution containing a water-soluble calcium salt and carbon dioxide to form an aqueous solution containing a magnesium salt and calcium carbonate precipitates whereby said impurities are transferred to the precipitates, filtering off the precipitates, then reacting the aqueous solution containing the magnesium salt, with ammonia to form a slurry comprising magnesium hydroxide solid and an aqueous solution containing an ammonium salt, and filtering the slurry to obtain highly pure magnesium hydroxide solid and an aqueous solution containing the ammonium salt.

Abstract: A curved surface machining method for machining a curved surface through unidirectional cutting by automatically creating a pick-feed path that will not cause a tool (TL) to strike a workpiece when a pick-feed is performed, pick-feeding the tool along the path, and thereafter performing cutting. The pick-feed path is obtained by using a given tool retraction quantity l for retracting the tool from a cutting path end point Pe, a clearance plane (CPL), coordinate values of the cutting end point Pe, and coordinate values of a cutting starting point Ps on the next cutting path.

Abstract: A method of machining performed by back-and-forth cutting, particularly a machining method for automatically creating a pick-feed path that will not cause a tool (TL) to interfere with a workpiece (WK) when a pick-feed is performed, moving the tool along the pick-feed path, and thereafter performing cutting. If the workpiece is concave in the proximity of the pick-feed path, the method includes obtaining an approach plane (AP) containing a machining end point (Pe) and lying parallel to a plane (PL) which contacts a curve (OLC) of the external shape of the workpiece at a next machining starting point Ps. Then a point of intersection Pc between the approach plane (AP) and a straight line (SL) passing through the machining starting point Ps is obtained, with the straight line coinciding with the direction of the central axis of the tool at the machining starting point. The path Pe.fwdarw.Pc.fwdarw.Ps serves as the pick-feed path.

Abstract: A blank profile specifying method in automatic programming for lathes has a step of specifying a finished profile (1), a step of entering a maximum length (L.sub.m) and a maximum diameter (F.sub.m) of a blank profile (2), a step of obtaining the maximum length (L.sub.t) and the maximum diameter (F.sub.t) of the finished profile from entered finished profile data, a step of calculating an uncut thickness (t.sub.z) longitudinally of the blank and an uncut thickness (t.sub.x) diametrically of the blank by using L.sub.m, L.sub.t, F.sub.m, F.sub.t, a step of obtaining the blank profile (2) by enlarging the finished profile by the uncut thicknesses in the respective directions, and displaying the blank profile and the finished profile, a step of entering position data indicative of inflection points (P.sub.1, P.sub.2 . . . P.sub.5) of an actual blank profile, and a step of storing the entered position data indicative of the inflection points and modifying the display of the blank profile by using the position data.

Abstract: An automatic programming method for creating an NC program by inserting miscellaneous data, such as M-function instruction data, feed rate instruction data, G-function instruction data and S-function instruction data, into previously created path data is disclosed. The method includes steps of displaying a path trajectory comprising a number of path blocks (b.sub.1, b.sub.2 . . . b.sub.16) on a display screen (105) by using the path data, positioning a cursor (CSR) at a prescribed position on the path trajectory, entering the miscellaneous data, and inserting the miscellaneous data into a block which is the same as that of the path data which correspond to a path block designated by the cursor, or at least at the front or rear of the block.

Abstract: The present invention relates to a tool radius compensation method for numerically controlled apparatus in which the coordinates Pi of the position of a tool center are computed which is offset a distance equal to the radius r of the tool in a direction normal to a surface to be cut based on commanded positional information P.sub.1, Pc and P.sub.2, for enabling the tool to three-dimensionally cut a workpiece. Based on the positional information P.sub.1, Pc and P.sub.2, a unit offset vector Vi is determined which lies on a plane defined by vectors U and V normal to first and second surfaces to be cut at a three-dimensional corner point Pc. Components along respective axes of the unit offset vector Vi are corrected so that the tool center will move smoothly along a curve contiguous to paths of movement of the tool center before and after the three-dimensional corner point Pc.

Abstract: A waterproof composite sheet material useful for sails of wind surfing equipment and boats, comprising a water-repellent fibrous sheet substrate impregnated with a water-repellent material and waterproof thermoplastic resin film layers firmly bonded to the surfaces of the substrate through waterproof bonding material layers.

Abstract: An image display method in which an image (IMG) to be presented is displayed on a CRT display screen (DFS), which method has steps of entering a horizontal dimension (L.sub.x) and a vertical dimension (L.sub.y) of the image to be presented; obtaining a magnification K by using lengths (B.sub.x, B.sub.y) in the horizontal and vertical directions of the display screen as well as the dimensions L.sub.x, L.sub.y ; obtaining coordinate values (X.sub.s, Y.sub.s) of the starting point (DS') of the image to be presented following multiplication thereof by K; specifying starting point coordinate values (X.sub.s ', Y.sub.s ') of the image on the display screen; obtaining shift quantities S.sub.x, S.sub.y in the horizontal and vertical directions by using the coordinate values (X.sub.s, Y.sub.s), (X.sub.s ', Y.sub.s ') of both starting points; and displaying the image (IMG) on the CRT display screen (DFS) by using the magnification K and the shift quantities S.sub.x, S.sub.y.

Abstract: A process for producing anhydrous sodium carbonate by the pyrolysis of wet sodium bicarbonate, which comprises (a) a step of forming a complex salt selected from the group consisting of Na.sub.2 CO.sub.3.3NaHCO.sub.3 and Na.sub.2 CO.sub.3.NaHCO.sub.3.2H.sub.2 O by the pyrolysis of wet sodium bicarbonate under such temperature and pressure conditions that said complex salt is stable, and (b) a step of forming anhydrous sodium carbonate by the pyrolysis of said complex salt under such temperature and pressure conditions that the anhydrous sodium carbonate is stable.

Abstract: The phase of nuclear magnetization in a target placed in a homogeneous magnetic field and excited by a high-frequency magnetic field is encoded by applying a specifying magnetic field with a non-linear gradient thereto, and the specifying magnetic field is scanned across the target, and the encoded NMR signals are received and processed so as to produce an image of the distribution of nuclear magnetic substance in the target.

Abstract: A cutting direction input method in automatic programming for deciding a path cutting direction, includes the following steps. A path trajectory comprising a number of path blocks (b.sub.1 .about.b.sub.15), is displayed on a display screen (105) by using path data, and a path starting point side (P.sub.2) or path end point side (P15) is indicated by a cursor (CSR). The cutting direction is entered by operating a cutting direction input switch when the path starting point side (P.sub.2) is being indicated by the cursor (CSR), in a case where cutting is to be performed from the path starting point (P.sub.1) toward the path end point (P.sub.16). The cutting direction is entered by operating the cutting direction input switch when the path end point side (P.sub.15) is being indicated by the cursor (CSR), in a case where cutting is to be performed from the path end point (P.sub.16) toward the path starting point (P.sub.1).

Abstract: A machining area specifying method for an automatic programming system specifies a partial path to be machined, wherein the path is part of a closed path. The machining area specifying method includes the step of displaying a closed path trajectory form by a number of path blocks (b.sub.1, b.sub.2 . . . b.sub.16) on a display screen (105) by using path data prepared beforehand. First and second points (P.sub.5, P.sub.12) on the closed path are entered by designating the points with a cursor (CSR). A point (P.sub.6) on a first path (P.sub.5 .fwdarw.P.sub.6 .fwdarw. . . . P.sub.12) and a point (P.sub.13) on a second path which are connected to the first and second points, are designated by the cursor.

Abstract: A method of indicating the results of diagnosing an apparatus in which a processor (105) performs prescribed processing under the control of a control program, which is stored in a ROM (102), using input information entered from a keyboard (101) having a plurality of keys (101a-1, 101a-2; 101b-1, 101b-2; . . . 101h-1, 101h-2) each of which is equipped with a lamp, various diagnostic tests are executed in accordance with a diagnostic program stored in the ROM (102). The method includes the steps of establishing correspondence between each diagnostic test and each of the lamps (101a-2, 101b-2, . . . 101h-2), starting the diagnostic program upon sensing, by a sensing unit 107, that electric power has been introduced, executing various diagnostic processes on the basis of the diagnostic program and, when a result of a diagnostic process is determined to represent a malfunction, lighting the lamps (101a-2, 101b-2, . . . 101h-2) corresponding to the processes for which the malfunctions have been determined.

Abstract: An automatic apparatus for mounting electronic parts on a printed circuit board includes a turntable, a plurality of mounting heads mounted in positions spaced at equal distances around the turntable, a plurality of mounting chucks movably mounted on each of the mounting heads and each having a shape for picking up a different shape electronic part, cams disposed around the periphery of the turntable and engageable with the mounting heads for positioning one mounting chuck on each of the mounting heads in a position for picking up a desired part, carrying the part around the periphery of the turntable and mounting it on the printed circuit board, and a device to drive the mounting chucks to pick up an electronic part and to mount electronic part picked up on the printed circuit board.

Abstract: A method and apparatus for creating numerical control data by entering coordinates which specify points on a drawing placed on a tablet. A minimum reading distance is preset at the time that coordinate values of points are to be entered from the tablet. This is followed by entering the coordinate values of prescribed points on the drawing by designating the points at random using a coordinate designating device. The coordinate values of the designated point are generated each time the coordinate designating device travels a distance equivalent to the minimum reading distance, or sampling pitch, as the device is moved continuously along a graphic appearing on the drawing. Then, numerical control data is created by using the generated coordinate values. Numerical control data approximating straight line segments can be readily created, even for curves other than straight lines and circular arcs, by setting the sampling pitch interval to a suitable value.