Abstract: An electric discharge machine for changing a specific resistance of a working fluid by flowing the working fluid through a circulation line including an ion-exchange device, the electric discharge machine includes a specific resistance detection unit configured to detect a specific resistance of the working fluid, a flow time measuring unit configured to measure flow time of the working fluid into the ion-exchange device, and a determination unit configured to determine that the ion-exchange device reaches a life end, when change value of the specific resistance of the working fluid is out of the predetermined range.

Abstract: In a wire electric discharge machine, a control unit is configured to deposit constituents of a wire electrode between a workpiece and a portion to be cut off from the workpiece to bond the workpiece and the portion to be cut off by outputting a signal for making an output voltage of a variable DC power supply lower than during normal machining and the on-time of a second switching element longer than during the normal machining, at least in a part of a machining path.

Abstract: A machining power supply device for an electric discharge machine performs control to turn on a first semiconductor switching element, which is arranged in series between a DC power supply and a capacitor connected in parallel with a machining gap between an electrode and a workpiece, to charge the capacitor, and turn on a second semiconductor switching element, which is arranged in parallel with the capacitor and connected to a rectifier element, within a period in which the first semiconductor switching element is off.

Abstract: A working fluid supply control apparatus for a wire electric discharge machine including a first pump supplying a working fluid through an upper nozzle and a second pump that supplies the working fluid through a lower nozzle independently of each other is provided. A supply amount of the working fluid supplied through the first pump is controlled such that the actual pressure of the working fluid supplied through the upper nozzle follows a preset target value. Control over the supply amount of the working fluid supplied through the lower nozzle is performed similarly to and independently of the control over the supply amount of the working fluid supplied through the upper nozzle.

Abstract: An object of the invention is to provide an in-vehicle apparatus and an in-vehicle system that can use a plurality of expansion modules. The in-vehicle apparatus includes a plurality of slots for connecting a plurality of modules, each having a connector for connection, to expand capabilities of the in-vehicle apparatus, and a control unit for identifying the kind of each of the plurality of modules connected to the plurality of slots.

Abstract: FIG. 1 shows an electronic program guide unique to viewer A grouped from an electronic program guide based on electronic program guide data; the program type is set in an (a) column and the display mode of each program is set in a (b) column. In FIG. 1, a news program is displayed in text and a music program is displayed in an icon of musical notes on a music sheet. A sports program is displayed in an icon of a bat and a ball. Since the music program and the sports program are thus displayed in such icon images of reminding the viewer of the program contents, the viewer A can quickly determine the program contents visually.

Abstract: An object of the invention is to provide an in-vehicle apparatus and an in-vehicle system that can use a plurality of expansion modules. The in-vehicle apparatus includes a plurality of slots for connecting a plurality of modules, each having a connector for connection, to expand capabilities of the in-vehicle apparatus, and a control unit for identifying the kind of each of the plurality of modules connected to the plurality of slots.

Abstract: A control circuit memorizes identification information of a landmark and a visits count relative to a spot assigned the landmark, in a visits count storing unit. The control circuit updates the visits count stored in the visits count storing unit when the spot assigned the landmark is visited. When a certain landmark becomes included in a map display range on a display unit, the control circuit refers to the visits count storing unit to determine whether a visits count relative to the certain landmark is greater than a predetermined count. The certain landmark is highlighted on the map when the visits count is determined to be greater than the predetermined count.

Abstract: In electric discharge machining for intermittently applying voltage pulses between a wire electrode and a workpiece with quiescent periods interposed, test voltage for checking conduction between upper and lower power feeding elements is applied during quiescent periods. When there is no conduction, it is determined that the wire electrode is broken between the upper and lower power feeding elements.

Abstract: Temperatures of four CPU cores of a multi-core CPU of a mobile body are detected. If the detected temperatures of the CPU cores become high, a clock setting register in a CPU clock-forming unit is set to the highest multiplying factor, and the CPU clock multiplying factors of the other clock setting registers are lowered. The clock frequencies of the CPU cores are lowered except a specified CPU core of a highest priority while maintaining the highest operation clock frequency for the specified CPU core, to thereby lower the temperature of the multi-core CPU. Alternatively, when the specified CPU core becomes abnormal, the processing assigned to it is reassigned to another CPU core of the plurality of CPU cores.

Abstract: An electric discharge machining apparatus capable of precisely detecting the electric discharge in a case of performing machining by minute machining energy such as in finish machining. A voltage is applied between a tool electrode and a workpiece by repeating ON/OFF of a switching element to charge a stray capacitance between the electrodes to cause electric discharge between the electrodes by the charged voltage. The electric discharge between the electrodes in the electric discharge machining by the minute machining energy is detected. The current between the electrodes is detected by integrating an output of a sensor coil. An offset component superposed in the output of the integrator by a low-pass filter is extracted. The extracted offset component is eliminated from the output of the integrator by a differential amplifier. An output of the differential amplifier is compared with a reference value to detect the electric discharge.

Abstract: A control circuit memorizes identification information of a landmark and a visits count relative to a spot assigned the landmark, in a visits count storing unit. The control circuit updates the visits count stored in the visits count storing unit when the spot assigned the landmark is visited. When a certain landmark becomes included in a map display range on a display unit, the control circuit refers to the visits count storing unit to determine whether a visits count relative to the certain landmark is greater than a predetermined count. The certain landmark is highlighted on the map when the visits count is determined to be greater than the predetermined count.

Abstract: A map display system includes an operation detection unit for detecting a contact of an indication member with a window frame of a map, a window resizing unit for resizing the window frame according to a movement of the indication member, and a window restoring unit for restoring the window frame to an indication member pre-contact state when the indication member loses contact with the window frame. The window resizing unit maintains a display scale of the map in a course of resizing the window frame, and the window restoring unit adapts the display scale of the map in the window frame being restored to include at least a display area of the map before restoring the window frame.

Abstract: A display apparatus includes a rendering unit, a priority determination unit, and a synthesized screen generation unit. The rendering unit determines necessary virtual screens based on an instruction signal from a navigation unit and information processing units. The priority determination unit determines a display priority based on a display content with respect to each virtual screen. The synthesized screen generation unit generates a synthesized screen to be displayed, by overlapping the determined virtual screens based on the determined display priorities. In this configuration, a certain window in a virtual screen, which has been displayed second or later in the order of overlapping windows, may be newly assigned the highest display priority when a display content in the certain window is changed. This allows the certain window to be displayed topmost and easily viewed by a user.

Abstract: An electric discharge machining apparatus capable of precisely detecting the electric discharge in a case of performing machining by minute machining energy such as in finish machining. A voltage is applied between a tool electrode and a workpiece by repeating ON/OFF of a switching element to charge a stray capacitance between the electrodes to cause electric discharge between the electrodes by the charged voltage. The electric discharge between the electrodes in the electric discharge machining by the minute machining energy is detected. The current between the electrodes is detected by integrating an output of a sensor coil. An offset component superposed in the output of the integrator by a low-pass filter is extracted. The extracted offset component is eliminated from the output of the integrator by a differential amplifier. An output of the differential amplifier is compared with a reference value to detect the electric discharge.

Abstract: Supply of a wire electrode, application of a detection voltage, and binarization and sampling of the detection voltage are started, so as to start advance of the wire electrode from the position A toward a workpiece. The position of the wire electrode when a sampling value (low level) is detected for the first time is designated as a position B, and the wire electrode is advanced from this position by a predetermined distance P1, and is stopped at a position C. Retreat of the wire electrode is started from the position C, and a position Q where the sampling value has changed from the high level to the low level is stored as a contact/noncontact boundary position. Further, retreat of the wire electrode is continued, and the wire electrode is stopped at a predetermined separating position D, to thereby finish the processing.

Abstract: When starting a wire cutting operation, a first predetermined current is supplied from a power unit to a wire, and at the same time predetermined tension is applied from a tension applying device to the wire. When a first predetermined time elapses since the start of the wire cutting operation, the current supplied from the power unit is switched to a second predetermined current which is smaller than the first predetermined current, and also the predetermined tension is continuously applied, whereby the wire is cut.

Abstract: When starting a wire cutting operation, a first predetermined current is supplied from a power unit to a wire, and at the same time predetermined tension is applied from a tension applying device to the wire. When a first predetermined time elapses since the start of the wire cutting operation, the current supplied from the power unit is switched to a second predetermined current which is smaller than the first predetermined current, and also the predetermined tension is continuously applied, such that the wire is cut.

Abstract: A power supplying device for an electric discharge machine prevents electric discharge by a voltage from a subsidiary power supply circuit during a delay time from generation of the electric discharge to a rise of a voltage from a main power supply circuit. A parallel circuit, of a current reducing resistor and a capacitor, is provided in series in the subsidiary power supply circuit. A controller turns on the subsidiary power supply circuit to apply a voltage between a first electrode and a workpiece, as a second electrode, to generate an electric discharge therebetween, electricity charging the capacitor flowing between the electrodes to maintain the electric discharge even if an electric discharge current oscillates. The controller further turns on a main power supply circuit to supply a machining current in response to detection of the electric discharge and the current reducing resistor suppresses any leakage current during the application of the voltage from the subsidiary power supply circuit.

Abstract: A power supplying device for an electric discharge machine capable of preventing intermission of an electric discharge by a voltage from a subsidiary power supply circuit during delay time from generation of the electric discharge to a rise of a voltage from a main power supply circuit without increasing a leakage current in applying the voltage from the subsidiary power supply circuit. A parallel circuit composed of a current reducing resistor and a capacitor is provided in series in the subsidiary power supply circuit. A controller turns on a switching element of the subsidiary power supply circuit to apply a voltage to urge generation of an electric discharge between an electrode and a workpiece as the other electrode. When the electric discharge is generated, electricity charging the capacitor flows between the electrodes to maintain the electric discharge even if an electric discharge current vibrates by inductance and floating capacitance.