Abstract: When a trouble occurs in a machine tool (20) sold by a machine tool manufacturer to a customer, a failure analysis apparatus (11) installed in a service center (10) of the machine tool manufacturer remotely controls the machine tool (20) to obtain operation information or alarm information of the machine tool (20) and performs failure analysis based on such information. In the service center (10), a plurality of failure analysis apparatuses (11) comprising personal computers, and a server (12) which are connected to the failure analysis apparatuses (11) for communication and to which a global IP address for the exclusive use is allocated are installed. Machine tools (20) of customers are connectable to the server (12) via the Internet (30).

Abstract: A power-window jamming preventing apparatus, includes a current sensing circuit, which senses a motor current flowing through a motor; a current limiting circuit, which increases and decreases the motor current based on a current-limitation control signal outputted from the current sensing circuit when an amount of increase of the motor current exceeds a predetermined vale; and a jamming determining circuit, which determines a jamming of a foreign matter in the window glass, and a potential difference generating circuit, which monitors a power source voltage supplied to the current sensing circuit and the power window motor, and which clamps a third reference voltage so as to drop a constant voltage from the third reference when the power source is low such that a potential difference between the second reference voltage and the third reference voltage is kept greater than a predetermined voltage.

Abstract: An authentication system includes a mail server (11) which receives an electronic mail delivered from a customer's machine tool (20), an operation state database (12) which stores operation state data extracted from the received electronic mail, a web server (13) which transmits specific operation state data to a customer's user PC (21) from the operation state database (12), a general identification database (14) in which general user IDs and passwords for identification of customers and machine codes of customers' machine tools (20) associated with the general user IDs are registered, a private server (15) which is accessible only by a service center PC (17) via a virtual private network, and a special identification database (16) in which special user identification data for identification of a service person and machine codes of all the customers' machine tools associated with a special user ID are registered.

Abstract: A current sensing circuit includes; a shunt resistor, on which a motor current is flown; a reference resistor which has a resistance value that is n times the shunt resistor; and a current following circuit. The current following circuit includes: a following current control circuit, which controls the following current and generates a first reference voltage; and a capacitor which generates a second reference voltage indicating an average value of the first reference voltage. A first comparator compares a third reference voltage higher than the first reference voltage with the second reference voltage, and outputs the current limitation control signal. A motor current sensing range expanding circuit expands a motor current sensing range by increasing a ratio of the current sensing circuit having the shunt resistor and the reference resistor.

Abstract: A device for detecting failure of a field effect transistor (FET) includes a first FET1 connected in series with a motor M between a power source terminal and ground, a motor control unit 11 for on/off controlling a voltage to be applied to said motor to set normal/reverse operation and stopping of said motor, a gate control unit for on/off controlling a gate voltage to be applied to said FET to control driving of said motor, a voltage applying means VB, R1 for applying a positive voltage at a prescribed voltage level to the current input terminal of the FET; a voltage detecting unit CMP1 for detecting the voltage level of the positive voltage thus applied when said gate voltage is off; and a failure detecting unit 14 for detecting short-circuiting failure of the FET on the basis of a change in the voltage level detected by said voltage detecting unit when said gate voltage is off while said motor stops.

Abstract: A power-window jamming preventing apparatus, includes a current sensing circuit, which senses a motor current flowing through a motor for driving a window glass; a current limiting circuit, which increases and decreases the motor current based on a current-limitation control signal outputted from the current sensing circuit when an amount of increase of the motor current exceeds a predetermined vale; a jamming determining circuit, which determines a jamming of a foreign matter in the window glass based on increase of the motor current to reverse a rotation of the motor; and a charge/discharge controlling circuit which monitors a voltage level of a charge/discharge controlling signal, and controls a charging/discharging circuit to keep a third reference voltage constant when the charge/discharge controlling signal having one of voltage levels is continuously outputted for a predetermined time.

Abstract: The invention relates to a maintenance system for machine tool. In the maintenance, system 1, a user management apparatus 10 connected to a numerical control section of a machine tool 15, and a manufacturer management apparatus 20 disposed on a side of a manufacturer are connected to each other via Internet 5. The user management apparatus 10 collects data relating to an operating condition of each driving mechanism of the machine tool 15, and accumulates the data. When a predetermined transmission condition is satisfied, the user management apparatus 10 transmits the accumulated operating condition data to the manufacturer management apparatus 20 in the form of an electronic mail. The manufacturer management apparatus 20 evaluates the consumption degree of each driving mechanism based on the received operating condition data, and outputs an alarm when the consumption degree exceeds a reference value.

Abstract: When an operation of lowering window glass is conducted to attain a full-opened state and a lock current flows, a lowering operation is invalidated, thereby preventing the lock current from continuously flowing. When a raising operation is conducted under the full-opened state, a power window motor is operated in a direction of closing the window glass, and the in validating state is canceled. In the case where, before the full-closed state is attained, a foreign object is caught and the lock current flows, the same as above is conducted. In a raising operation of closing the window glass, the raising operation under the full-closed state is invalidated, thereby preventing the lock current from continuously flowing. When a lowering operation is conducted under the full-closed state, the power window motor is operated in the direction of opening the window glass, and the invalidating state is canceled.

Abstract: The invention relates to a maintenance system for machine tool. In the maintenance system 1, a user management apparatus 10 connected to a numerical control section of a machine tool 15, and a manufacturer management apparatus 20 disposed on a side of a manufacturer are connected to each other via Internet 5. The user management apparatus 10 collects data relating to an operating condition of each driving mechanism of the machine tool 15, and accumulates the data. When a predetermined transmission condition is satisfied, the user management apparatus 10 transmits the accumulated operating condition data to the manufacturer management apparatus 20 in the form of an electronic mail. The manufacturer management apparatus 20 evaluates the consumption degree of each driving mechanism based on the received operating condition data, and outputs an alarm when the consumption degree exceeds a reference value.

Abstract: An operation management system 1 according to the present invention is configured so as to connect an operation data accumulation and transmission device 10 connected to an NC unit 16 to an operation management device via telecommunication circuits 20. The operation data collection and transmission device 10 collects data on an operating condition of a machine tool 15 to store the same in an operation data storage section 12, and based on the accumulated operating condition data, generates transmit data with a configuration for associating a data-element identifier which defines an item concerning operating condition with operating condition data corresponding to this item to transmit the same to the operation management device. The operation management device analyzes the data-element identifier of the received data, recognizes the operating condition item and updates the operating condition data in databases corresponding to the recognized item by the received operating condition data.

Abstract: An operation management system 1 according to the present invention is configured so as to connect an operation data accumulation and transmission device 10 connected to an NC unit 16 to an operation management device via telecommunication circuits 20. The operation data collection and transmission device 10 collects data on an operating condition of a machine tool 15 to store the same in an operation data storage section 12, and based on the accumulated operating condition data, generates transmit data with a configuration for associating a data-element identifier which defines an item concerning operating condition with operating condition data corresponding to this item to transmit the same to the operation management device. The operation management device analyzes the data-element identifier of the received data, recognizes the operating condition item and updates the operating condition data in databases corresponding to the recognized item by the received operating condition data.

Abstract: A wiper control device in which an abnormal condition of a FET is detected by distinguishing an action of an overheat-cutting protective function normally difficult to be detected with measuring the drain voltage of the FET and by which the control of the pertinent FET is restrained upon the detection of abnormality so as to prevent a short circuit in the wiper control device from occurring. When an FETB (Qb) is set on, whether or not a drain voltage Vd is lower than Vpe ({fraction (l/2)}VG) is judged (step S5), and if lower, it is judged that the drain and ground is short-circuited, that is, an overheat-cutting protective function is acted, and “1” is added to the number of times of short circuit detection Perror (step S7). It is judged whether or not the added value of the number of times of short circuit detection Perror reaches a reference value (step S11).

Abstract: An apparatus for detecting an obstacle to a power regulated window, which can detect existence of an obstacle by a method of differential current at low rotating speed of a motor M and reduce a force of biting an obstacle and prevent from detecting an obstacle unexpectedly at high rotating speed, includes current detecting means 1 for detecting a value of load current IL flowing through the motor M, reference-value generating means 4 for generating a reference value RF correspondingly to rotating speed N of the motor M for judging when the value of load current IL exceeds a predetermined value of over-load current, and comparing means 5 for judging whether or not the value of load current IL exceeds the reference value RF.

Abstract: A function selecting control system is provided, which modularizes a plurality of wiper control systems, builds them in an integrated circuit, and selects a desired system on the basis of a selection signal of the system from the outside, thereby drive-controlling a wiper motor. The function selecting control system includes: input device 30a for inputting a selection signal which selects a control logic block 30h corresponding to a starting control mode out of the control logic blocks provided for every control mode of the motor; judgment device 30c for reading the input selection signal for a standard number of times and for judging the coincidence among the read selection signals; count device 30e for counting the number of times of the coincidence; settlement device 30f for settling the selection signal when the number of times of the coincidence reaches the predetermined standard number; and system starting device 30g for starting a control logic corresponding to the settled selection signal.

Abstract: A device for detecting failure of a field effect transistor (FET) includes a first FET1 connected in series with a motor M between a power source terminal and ground, a motor control unit 11 for on/off controlling a voltage to be applied to said motor to set normal/reverse operation and stopping of said motor, a gate control unit for on/off controlling a gate voltage to be applied to said FET to control driving of said motor, a voltage applying means VB, R1 for applying a positive voltage at a prescribed voltage level to the current input terminal of the FET; a voltage detecting unit CMP1 for detecting the voltage level of the positive voltage thus applied when said gate voltage is off; and a failure detecting unit 14 for detecting short-circuiting failure of the FET on the basis of a change in the voltage level detected by said voltage detecting unit when said gate voltage is off while said motor stops.

Abstract: A wiper control device is provided, in which an abnormal condition of a FET is detected by distinguishing an action of an overheat-cutting protective function normally difficult to be detected with measuring the drain voltage of the FET and by which the control of the pertinent FET is restrained upon the detection of abnormality so as to prevent an accident in the wiper control device from occurring. When a FETB (Qb) is set on, whether or not a drain voltage Vd is lower than Vpe (½VG) is judged (step S5), and if lower, it is judged that the drain and ground is short-circuited, that is, an overheat-cutting protective function is acted, and “1” is added to the number of times of accident detection Perror (step S7). It is judged whether or not the added value of the number of times of accident detection Perror reaches a reference value (step S11).

Abstract: A function selecting control system is provided, which modularizes a plurality of wiper control systems, builds them in an integrated circuit, and selects a desired system on the basis of a selection signal of the system from the outside, thereby drive-controlling a wiper motor. The function selecting control system includes: input means 30a for inputting a selection signal which selects a control logic block 30h corresponding to a starting control mode out of the control logic blocks provided for every control mode of the motor; judgment means 30c for reading the input selection signal for a standard number of times and for judging the coincidence among the read selection signals; count means 30e for counting the number of times of the coincidence; settlement means 30f for settling the selection signal when the number of times of the coincidence reaches the predetermined standard number; and system starting means 30g for starting a control logic corresponding to the settled selection signal.

Abstract: A controller of a label printer employs an electronic photographic system which makes printing successively on a continuous printing paper on which a multiplicity of label papers are affixed. There are provided a position sensor using a photoelectric transducer element which is disposed to face the continuous printing paper and detect a difference in the transmissivity of light of the continuous printing paper and a label position detector for processing a detection signal of the position sensor to derive a timing control signal corresponding to a position of the label paper. The timing control signal of the label position detector is used to control operation timings for each of the portions for the continuous printing paper.