Abstract: A remote management system includes: a user operation server; a remote maintenance server; and a connection server, the user operation server, the remote maintenance server, and the connection server being connected to each other via a network, the remote maintenance server including a processor that operates as a setting change receiving unit that receives a setting value change instruction for an image forming apparatus from a user via the user operation server, a first setting change detection unit that detects a changed setting value based on the setting value change instruction, a setting change informing unit that informs an administrator and a user-in-charge of the image forming apparatus of the changed setting value, and a setting change command sending unit that sends a command to change setting of the image forming apparatus to the image forming apparatus via the connection server.

Abstract: A wire electric discharge machine with tension monitoring function comprising a tension generation unit configured to generate tension in the wire electrode, a first tension measurement unit set on the wire electrode and configured to measure tension, and a tension control unit configured to feedback tension value measured by the first tension measurement unit and output tension command value to the tension generation unit such that the tension value is equal to a target value, wherein a warning signal is configured to be generated when the tension command value output by the tension control unit is not within a set range corresponding to the target value of the tension.

Abstract: In a wire electric discharge machine of the present invention, a control variable detection apparatus is an inter-pole voltage detection apparatus and detects an average inter-pole voltage as a control variable correlating with an inter-pole distance. The wire electric discharge machine comprises a machining feed speed calculation apparatus determining a machining feed speed on the basis of a deviation between target voltage set by a target value setting apparatus 7 and the average inter-pole voltage so as to eliminate the deviation. The wire electric discharge machine further comprises a feed speed distribution apparatus and a relative movement apparatus. The inter-pole distance can be kept constant by the relative movement of a wire electrode and a workpiece made on the basis of a command of thus determined machining feed speed.

Abstract: In order to prevent a reduction in the rate of operation and malfunction due to dirt in a machining tank, a wire electric discharge machine configured to perform electric discharge machining in the machining tank is provided with a camera for capturing an image of the inside of the machining tank and determining unit for detecting dirt in the machining tank based on the image captured by the camera. The dirt in the machining tank is detected by the determining unit.

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: An electrical discharge machine of the present invention is provided with a machining tank stored with a machining fluid in which a workpiece is immersed for electrical discharge machining, a reservoir unit configured to store the machining fluid in order to supply to and recover the machining fluid from the machining tank, a machining tank non-storage condition detecting unit configured to detect that the machining fluid is not stored in the machining tank, an addable amount specifying unit configured to specify the amount of the machining fluid stored in the reservoir unit when it is detected that the machining fluid is not stored in the machining tank and specify an addable amount, which is an addable machining fluid amount, based on the capacity of the reservoir unit and the amount of the machining fluid stored in the reservoir unit, and a machining fluid adding unit configured to add the machining fluid in the addable amount or less.

Abstract: A control device of a wire electric discharge machine and a machine learning device are provided that can appropriately and readily determine a correction parameter. The control device, which optimizes the correction parameter for wire electrical discharge machining process, includes a machine learning device configured to learn the correction parameter for the wire electrical discharge machining process.

Abstract: The upper limit value for the axis feeding speed is set to the maximum speed that can secure the safety in a wire electrical discharge machine. In the case where the level of the process liquid is higher than a predetermined height, however, the upper limit value is made smaller. In order to prevent the process liquid from spilling to the outside of the process tank, the acceleration or the jerk may be changed instead of the axis feeding speed. In the case where the process liquid level is high, it is difficult for the process liquid to spill when the speed is adjusted slowly. In addition, the time constant may be increased or the instruction for speed may be changed from the linear type to the S shape type.

Abstract: A wire electrical discharge machine includes: an electrode unit for supplying a machining current to an electrode gap; a switch for changing impedance between a machining power source and the electrode unit; and a controller for, at the time of a core retaining process, controlling the switch to set the impedance to be higher than the impedance in a cutting process and thereby suppressing the machining current flowing through the electrode gap.

Abstract: In a wire electric discharge machine, a discharge delay time is used to classify the inter-electrode state into three categories; a short-circuit state, small-gap state, and large-gap state. Based on this classification, the magnitude of a machining current supplied from a main discharge circuit is determined. If the discharge delay time is zero (i.e., if no electric discharge is generated) after the lapse of a predetermined time since the start of the application of a machining voltage to an inter-electrode gap by an auxiliary discharge circuit, the inter-electrode gap is determined to be short-circuited by machining chips. Thereupon, a short-circuit machining current is supplied from the main discharge circuit to the inter-electrode gap to remove the machining chips. In this way, establishment of a complete short-circuit state is prevented so that the machining efficiency is improved to increase the machining speed.

Abstract: An electrical discharge machine includes: a work tank to store the working fluid in order to perform electrical discharge machining; a sound collector to collect sound generated by electrical discharge machining and transmitted through the working fluid stored in the work tank; and a controller to perform a predetermined operation based on sound information collected by the sound collector.

Abstract: An electrical discharge machine includes: a machining power supply having a plurality of different circuit states, and configured to be capable of being set to one circuit state of the plurality of circuit states by switching at least one of electrical connection and electrical setting; a state determining unit configured to, when each of the plurality of circuit states is set as the circuit state of the machining power supply, determine whether or not the set circuit state is normal; a failure portion specifying unit configured to specify a failure portion of the machining power supply based on a determination result with respect to each of the plurality of circuit states obtained by the state determining unit; and a reporting unit (a display unit or the like) configured to report the failure portion specified by the failure portion specifying unit to an operator.

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: An electrical discharge machine of the present invention is provided with a machining tank stored with a machining fluid in which a workpiece is immersed for electrical discharge machining, a reservoir unit configured to store the machining fluid in order to supply to and recover the machining fluid from the machining tank, a machining tank non-storage condition detecting unit configured to detect that the machining fluid is not stored in the machining tank, an addable amount specifying unit configured to specify the amount of the machining fluid stored in the reservoir unit when it is detected that the machining fluid is not stored in the machining tank and specify an addable amount, which is an addable machining fluid amount, based on the capacity of the reservoir unit and the amount of the machining fluid stored in the reservoir unit, and a machining fluid adding unit configured to add the machining fluid in the addable amount or less.

Abstract: In a wire electric discharge machine of the present invention, a control variable detection apparatus is an inter-pole voltage detection apparatus and detects an average inter-pole voltage as a control variable correlating with an inter-pole distance. The wire electric discharge machine comprises a machining feed speed calculation apparatus determining a machining feed speed on the basis of a deviation between target voltage set by a target value setting apparatus 7 and the average inter-pole voltage so as to eliminate the deviation. The wire electric discharge machine further comprises a feed speed distribution apparatus and a relative movement apparatus. The inter-pole distance can be kept constant by the relative movement of a wire electrode and a workpiece made on the basis of a command of thus determined machining feed speed.

Abstract: An electrical discharge machine is disclosed having a concentration detection function for a rust inhibitor containing an organic compound uses coloring of a metal complex produced through the reaction of the rust inhibitor with a color reagent to enable a detector to detect the change of characteristics involved in the change of the color of the metal complex. A predetermined amount of working fluid is sampled in a sampling cell at regular time intervals, a predetermined amount of color reagent is added to the working fluid, and the change of the color of the working fluid is detected by the detector.

Abstract: The upper limit value for the axis feeding speed is set to the maximum speed that can secure the safety in a wire electrical discharge machine. In the case where the level of the process liquid is higher than a predetermined height, however, the upper limit value is made smaller. In order to prevent the process liquid from spilling to the outside of the process tank, the acceleration or the jerk may be changed instead of the axis feeding speed. In the case where the process liquid level is high, it is difficult for the process liquid to spill when the speed is adjusted slowly. In addition, the time constant may be increased or the instruction for speed may be changed from the linear type to the S shape type.

Abstract: In a wire electric discharge machine, a discharge delay time is used to classify the inter-electrode state into three categories; a short-circuit state, small-gap state, and large-gap state. Based on this classification, the magnitude of a machining current supplied from a main discharge circuit is determined. If the discharge delay time is zero (i.e., if no electric discharge is generated) after the lapse of a predetermined time since the start of the application of a machining voltage to an inter-electrode gap by an auxiliary discharge circuit, the inter-electrode gap is determined to be short-circuited by machining chips. Thereupon, a short-circuit machining current is supplied from the main discharge circuit to the inter-electrode gap to remove the machining chips. In this way, establishment of a complete short-circuit state is prevented so that the machining efficiency is improved to increase the machining speed.

Abstract: In order to prevent a reduction in the rate of operation and malfunction due to dirt in a machining tank, a wire electric discharge machine configured to perform electric discharge machining in the machining tank is provided with a camera for capturing an image of the inside of the machining tank and determining unit for detecting dirt in the machining tank based on the image captured by the camera. The dirt in the machining tank is detected by the determining unit.

Abstract: A wire electric discharge machine with tension monitoring function comprising a tension generation unit configured to generate tension in the wire electrode, a first tension measurement unit set on the wire electrode and configured to measure tension, and a tension control unit configured to feedback tension value measured by the first tension measurement unit and output tension command value to the tension generation unit such that the tension value is equal to a target value, wherein a warning signal is configured to be generated when the tension command value output by the tension control unit is not within a set range corresponding to the target value of the tension.