Abstract: The present invention provide a workpiece exchanging system in a CNC lathe having two spindle heads. The workpiece is machined by a spindle head A (S1, S2), a spindle head B is moved toward the spindle head A while loading a servo motor controlling a feed axis for the spindle head B to a torque limit (S3, S4). An error (d) of the feed axis is detected when this movement is completed, and it is determined whether the workpiece is normally clamped by a chuck mounted at a spindle head (S5, S7). The workpiece is machined as it is in accordance with the error of the feed axis (S9), is machined after being moved by a coordinate corresponding to the error (S8), an alarm is displayed, and the CNC is stopped (S10).

Abstract: A tape sag preventing apparatus includes a master cam, a main slide device interlocking with a brake lever movable by the master cam, an idle gear for driving reel disks and converting rotating directions of the reel disks and a tape sag preventing device for preventing the sag of the tape in converting the transporting direction of the tape according to the movement of the main slide device. The main slide device is provided with a cam slot formed on an end thereof to drive a tension pole. The tape sag preventing device has an operating lever biased by an elastic member and a driving gear which is rotated by the operating lever so as to tighten a spring around a transmission gear and thereby impart rotation to the supply reel so as to take up slack in the tape during a change in the direction of the tape transport.

Abstract: Disclosed is a cooperative operation system for a numerical control apparatus composed of numerical control apparatuses (CNCs) used in a transfer line. Each of CNCs (10, 20) is provided with a CNC control unit (11, 21), a switching circuit (12, 22) connected to the CNC control unit (11, 21) for switching an I/O signal, a RAM (13, 23) connected to the switching circuit (12, 22) for storing the I/O signal, a programmable machine controller (PMC) (16, 26) connected to the RAM (13, 23), and a serial transfer control circuit (15, 25) connected to the RAM (13, 23) for transferring the I/O signal to the another CNC. The PMC (16) receives or transmits the I/O signal of another CNC (20) through the serial transfer control circuit (15). The CNC (10, 20) can input and output the I/O signal thereof through the transfer control circuit (15, 25) to thereby increase the signal transfer speed, and thus a cooperative operation can be carried out at a high speed.

Abstract: A programmable controller according to the present invention is for reinforcing the function of a programmable machine controller (PMC) of a numerical control unit (CNC) incorporating a minicomputer. In order to achieve high-speed processing of a PMC ladder program which implements auxiliary control functions for machining inclusive of tool-change control, control of the rotational speed of a spindle and workpiece-change control, the programmable controller is provided with an electrically rewritable programmable read-only memory (EEPROM) (6), and a random-access memory (RAM) (7) to which program data is transferred from the EEPROM (6), and the arrangement is such that the contents of the EEPROM (6) are rewritten before the data transfer.

Abstract: A numerical control device adapted to control a plurality of transfer machines mounted on a transfer line. The numerical control device is composed of an NC section (13) for controlling the axes of the transfer machines and a PMC section (14) for executing sequence control. The PMC section (14) reads current position data from a current position register (16) of the NC section (13) through a window, and compares the read data with previously set zone data (19). A function instruction (18a) delivers the result of the comparison as a zone signal, and executes a modification control of an execution sequence by using the zone signal. Therefor, a high-accuracy region signal can be set.

Abstract: A method for purifying a crude high-molecular weight substance containing an alkali metal compound by extracting the alkali metal compound with water is disclosed, which comprises stirring a mixture comprising said crude high-molecular weight substance and water in a high-speed stirring tank to extract the alkali metal compound into an aqueous phase and separating the high-molecular weight substance phase and the aqueous phase from each other by continuous centrifugation. An alkali metal compound as an impurity can be efficiently removed with small-sized equipment in a short time.

Abstract: A system for carrying out reference point return in a numerical control device is provided, including a deceleration dog having a short length and arranged at a machine table, a deceleration limit switch operated by the deceleration dog, for generating a deceleration start signal, and a time setting device (6) for setting a deceleration time, starting with a generation of the deceleration start signal and ending with a generation of a deceleration end signal, and a slow-speed travel time. A reference point return processing device (5) starts a deceleration of the machine table in response to the deceleration start signal, and stops the machine table at a first electrical grid point reached by the machine table after the slow-speed travel time has elapsed after the passing of the deceleration time.

Abstract: A machine position detecting apparatus according to the invention detects the absolute position of a machine by a pulse coder or the like attached to a movable element. Whenever the movable element of the machine is stopped, a check is performed to determine whether the detected position of the movable element is accurate. This is accomplished by a counter for counting the amount of shift of an absolute position detector circuit in one revolution based on a rotational position signal, and a collator for collating contents of the counting means with contents of position memory means and checking the stored contents of the position memory means when the movable element is stopped.

Abstract: A system for processing an MST function command in a numerical control system including a computerized numerical control apparatus (CNC, 10) and a PMC (programmable machine controller). A strobe signal MF, SF, TF is issued from the computerized numerical control apparatus (10) in an opposite logic state to that of a finish signal MFIN, SFIN, TFIN. The PMC (20) determines that there is a command when the strobe signal is of the opposite logic state to that of the finish signal being issued. When the execution of an MST function is finished, the finish signal is converted to a logic state opposite to that of the strobe signal MF, SF, TF. The computerized numerical control apparatus (10) determines that the processing of the MST function is finished when the logic state of the finish signal becomes identical to that of the strobe signal. When the finish signal and the strobe signal become different from each other as to their logic states, therefore, it can be determined that there is a command.

Abstract: A platinum complex of the formula ##STR1## wherein n is 1 or 2 and X is chlorine, bromine or iodine is described, which is useful intermediate; thus, it can be reacted with silver nitrate or silver sulfate and the resulting compound can be treated with an anion exchange resin or barium hyroxide to give a compound of the formula ##STR2## which can then be reacted with glycolic acid to furnish a compound of the formula ##STR3## wherein n is 1 or 2 and A is --OCOCH.sub.2 O--; these products are useful antineoplastic agents.

Abstract: Novel platinum complex of the formula: ##STR1## wherein n is an integer of 1 or 2 and A is a ligand of the formula: ##STR2## which has excellent antineoplastic activity and is useful as an antineoplastic agent for the treatment of various malignant tumors, and a pharmaceutical composition containing the platinum complex as an active ingredient, and an intermediate for preparing the compound.

Abstract: An NC unit processing method executes numerical control processing based on a numerical control program and sequence control processing based on a sequence program at predetermined times on a time-sharing basis. The processing method first stores a location of a sequence program to be executed next in a predetermined storage area in response to a first timer interrupt (IRQ.sub.n+1) generated during execution of the sequence program. Input/output processing based on an input/output program is then executed, followed by numerical control processing based on the numerical control program in response to a second timer interrupt (IRQ.sub.n) generated during execution of the input/output processing. When the numerical control program ends, the execution location of the sequence program is referred to, and sequence program processing is executed from this location until the first timer interrupt (IRQ.sub.n) is once again generated.

Abstract: An axis feedrate output system for CNC equipment which controls the position of a machining table in each axis by effecting feedrate control in accordance with a residual error between a position command and detected positional information in each axis. A current feedrate of the machining table in each axis is derived from the residual error, and a current actual feedrate of the machining table is synthesized using the current feedrate for the respective axes an output which represents the current actual feedrate of the machining table in the form of a ratio to a predetermined maximum feedrate is generated. An error register stores the residual error (servo error) between the position command for each axis from an MPU in the CNC equipment and the positional information detected by a position sensor and provides a feedrate command for effecting feedrate control.

Abstract: A focused light beam is projected upon an optical recording medium through an optical system in an optical pickup, and a light reflected from the recording medium is received to detect a focus error signal and a tracking error signal. Further, the focus control and the tracking control are both achieved through a servo feedback loop in response to the detected focus and tracking error signals. In this optical information recording and reproducing system, track formats are provided from which lights of different intensities are reflected, the track formats are discriminated by a projection position detecting circuit, and the focusing and tracking operations are controlled by selectively adjusting the gain of the servo feedback system according to the detected track format, so that the control operation is stable in recording or reproducing information data to or from a recording medium of a high density type, in particular.

Abstract: Antimony trioxide is reached with an organic mercaptan R.sup.1 --SH or R.sup.2 --OCO--(CH.sub.2).sub.n --SH (where R.sup.1 is an alkyl, alkenyl, aryl, aralkyl, cycloalkyl or heterocyclic group having from 1 to 18 carbon atoms, which optionally has sulfide bond or ether bond or a hydroxyl or carboxyl group as a substituent, R.sup.2 is a hydrogen atom or an alkyl, alkenyl, aryol, aralkyl, cycloalkyl or heterochclic group having from 1 to 18 carbon atoms, which optionally has sulfide bond or ether bond or a hydroxyl or carboxyl group as a substituent, and n is 1 to 3) in the presence of a lower aliphatic carboxylic acid to give an antimony mercaptide Sb(--SR.sup.1).sub.3 or Sb(--S--(CH.sub.2).sub.n --COOR.sup.2).sub.3 of high purity with high yield. The products are excellent in the time-dependent stability and the effect as a passivator for catalysts for catalytic cracking of hydrocarbons.

Abstract: An optical pickup is provided below an optical disk. A laser beam is emitted from a semiconductor laser onto a track, through an objective lens. The objective lens is capable of shifting, and is shifted in the direction of the track width by a magnetic force from a tracking actuator, thereby performing lens tracking. The optical pickup is mounted on a carriage. The carriage is shifted along the radial direction of the optical disk by a voice coil motor. This shifts the laser beam along the radial direction of the optical disk, thereby performing track access. Upon reception of an access command, a velocity control mode commences, and the shift velocity of the carriage is controlled in accordance with a velocity control signal corresponding to the distance between a target track and a current track. When the pickup arrives near the target track, the generation of velocity control signal ceases and the location control mode commences.

Abstract: There is disclosed a color filter for wind-up system color changer which comprises two sheets of laminated transparent films in continuous length, having a plural number of units each comprising a sheet of a transparent film folded in two provided in series sealed between the films in continuous length with its line of flection being disposed along the longer direction of the films in continuous length, and the edges of the units on the opposite side to the line of flection being under the state opened.

Abstract: An optical recording/reproducing apparatus includes a pickup with a laser light source, an objective lens and lens drive coil for moving the optical axis of the laser beam transmitted through objective lens, a carriage drive voice-coil motor for moving a carriage with the pickup mounted thereon to move the laser beam transmitted through the objective lens, and tracking apparatus for operating both the lens drive coil and the carriage drive voice-coil motor. The tracking apparatus includes a lens servo stable detecting device for detecting that the laser beam from the objective lens has reached a desired track, apparatus for turning on a servo control loop with the lens drive coil in response to a tracking instruction, and apparatus for turning on a servo control loop with the carriage drive voice-coil motor in response to a detection output from the lens servo stable detecting device.

Abstract: An optical pickup is arranged under an optical disk. Tracks of the disk are irradiated with a laser beam from the pickup. A beam reflected by a given track becomes incident on the pickup. A tracking error signal from the pickup is supplied to a lens moving actuator through a gain phase compensating circuit and a lens driving circuit, and an objective lens in the pickup is radially moved along disk. The tracking error signal is supplied to a voice coil motor through the phase compensating circuit. A carriage carrying the pickup thereon can be radially moved along the disk. When a tracking instruction is generated, the lens driving circuit drives the objective lens to start tracking. Meanwhile, the low-frequency components of the tracking error signal which are lower than the resonance frequency of the lens tracking circuit are amplified by the gain phase compensating circuit.

Abstract: An apparatus for recording and reproducing optical information is disclosed.