Abstract: A printing apparatus includes a mounting unit, a tank, a pump, a detection unit, an obtainment unit, and a control unit. The mounting unit is configured so that a head that ejects ink can be mounted in a replaceable manner. The tank contains ink to be supplied to the head via a tube. The pump discharges ink to an outside of the head. The detection unit detects that the head mounted on the mounting unit has been replaced. The obtainment unit obtains information of a usage history which indicates whether or not the head mounted as a replacement has been used. The control unit controls a discharge operation, which is performed by the pump after head replacement, to be changed based on the information of the usage history.

Abstract: An ejection apparatus includes an ejection head, and a recessed portion, a wiper, an installation unit, and a moving unit configured to move the blade and the ejection head relative to each other, wherein the wiper performs a wiping operation for wiping the ejection head to wipe the ejection port after wiping the recessed portion, and wherein in the wiping operation, a first wiping operation is performed in a state where the ejection port surface and the installation unit on which the wiper is installed are at a first distance in a direction perpendicular to the ejection port surface, and a second wiping operation is performed in a state where the ejection port surface and the installation unit on which the wiper is installed are at a second distance in the direction perpendicular to the ejection port surface, the second distance being larger than the first distance.

Abstract: An ejection apparatus includes an ejection head having an ejection port surface and configured to eject a liquid to a recording medium for recording, a wiper configured to wipe the surface, and a moving unit configured to relatively move the wiper and the head to move the wiper in a first direction along the surface with respect to the head. The apparatus performs a first mode for performing the wiping while relatively moving the wiper and the head at a first speed, and a second mode for performing the wiping while relatively moving the wiper and the head at a second speed higher than the first speed. When the apparatus performs the wiping after the recording and then performs subsequent recording, the apparatus performs the second mode. When the apparatus performs the wiping after the recording and then performs no subsequent recording, the apparatus performs the first mode.

Abstract: A method for inspecting an ink discharge status based on a temperature change of an energy generating element includes calculating a difference value between a value obtained by statistics of information indicating ink discharge statuses obtained for a plurality of nozzles close to a target nozzle and the information obtained for the target nozzle; comparing the calculated difference value with a predetermined threshold; and judging the ink discharge status for the target nozzle based on a result of the comparison. This enables to appropriately detect a nozzle which is in a discharge failure status due to an ink droplet adhered to a discharge surface of a printhead or the like.

Abstract: An ejection apparatus includes an ejection head having an ejection port surface and configured to eject a liquid to a recording medium for recording, a wiper configured to wipe the surface, and a moving unit configured to relatively move the wiper and the head to move the wiper in a first direction along the surface with respect to the head. The apparatus performs a first mode for performing the wiping while relatively moving the wiper and the head at a first speed, and a second mode for performing the wiping while relatively moving the wiper and the head at a second speed higher than the first speed. When the apparatus performs the wiping after the recording and then performs subsequent recording, the apparatus performs the second mode. When the apparatus performs the wiping after the recording and then performs no subsequent recording, the apparatus performs the first mode.

Abstract: An ejection apparatus includes an ejection head, and a recessed portion, a wiper, an installation unit, and a moving unit configured to move the blade and the ejection head relative to each other, wherein the wiper performs a wiping operation for wiping the ejection head to wipe the ejection port after wiping the recessed portion, and wherein in the wiping operation, a first wiping operation is performed in a state where the ejection port surface and the installation unit on which the wiper is installed are at a first distance in a direction perpendicular to the ejection port surface, and a second wiping operation is performed in a state where the ejection port surface and the installation unit on which the wiper is installed are at a second distance in the direction perpendicular to the ejection port surface, the second distance being larger than the first distance.

Abstract: A method for inspecting an ink discharge status based on a temperature change of an energy generating element includes calculating a difference value between a value obtained by statistics of information indicating ink discharge statuses obtained for a plurality of nozzles close to a target nozzle and the information obtained for the target nozzle; comparing the calculated difference value with a predetermined threshold; and judging the ink discharge status for the target nozzle based on a result of the comparison. This enables to appropriately detect a nozzle which is in a discharge failure status due to an ink droplet adhered to a discharge surface of a printhead or the like.

Abstract: A printing apparatus, which uses a printhead including a circuit configured to inspect an ink discharge status of a selected nozzle using a temperature detection element, causes the printhead to inspect the ink discharge status by changing a threshold value for judging a detection result of the temperature detection element, in order to judge the ink discharge status in a state in which a heater in the selected nozzle is driven by each of a first pulse and a second pulse whose waveform is different from that of the first pulse, obtains first information about a change point where a judgment result obtained by the first pulse changes, and second information about a change point where a judgment result obtained by the second pulse changes, and sets the threshold value, based on the first and second information.

Abstract: A method for inspecting an ink discharge status based on a temperature change of an energy generating element includes calculating a difference value between a value obtained by statistics of information indicating ink discharge statuses obtained for a plurality of nozzles close to a target nozzle and the information obtained for the target nozzle; comparing the calculated difference value with a predetermined threshold; and judging the ink discharge status for the target nozzle based on a result of the comparison. This enables to appropriately detect a nozzle which is in a discharge failure status due to an ink droplet adhered to a discharge surface of a printhead or the like.

Abstract: A printing apparatus using a printhead that includes an inspection circuit for inspecting an ink discharge status for each nozzle performs an inspection processing. The apparatus selects a nozzle as a target of inspection of the ink discharge status, sets a threshold value for inspecting a detection result of a temperature detection element corresponding to the selected nozzle, and uses the inspection circuit and the set threshold value. The apparatus receives, from the printhead, an inspection result for the selected nozzle, determines, based on the received inspection result, a threshold value to be used by the inspection circuit for inspecting the discharge status of the selected nozzle in a subsequent inspection, and stores the determined threshold value in a memory.

Abstract: A method for inspecting an ink discharge status based on a temperature change of an energy generating element comprises: calculating a difference value between a value obtained by statistics of pieces of information indicating ink discharge statuses obtained for a plurality of nozzles close to a target nozzle and the information obtained for the target nozzle; comparing the calculated difference value with a predetermined threshold; and judging the ink discharge status for the target nozzle based on a result of the comparison. This enables to appropriately detect a nozzle which is in a discharge failure status due to an ink droplet adhered to a discharge surface of a printhead or the like.

Abstract: An image forming apparatus includes a printhead in which a plurality of element substrates for discharging a print material are arranged; a heating unit that maintains a temperature within the element substrate at a target temperature for each of the plurality of element substrates; a detection unit that detects the temperature within the element substrate for each of the plurality of element substrates; and a control unit that, for each of the plurality of element substrates, compares a highest temperature within the element substrate that is detected by the detection unit with a predetermined threshold, and if the highest temperature exceeds the predetermined threshold, sets the target temperature for the element substrate at a temperature which is higher than a target temperature set when the highest temperature does not exceed the predetermined threshold and lower than the predetermined threshold.

Abstract: An object of the present disclosure is to acquire an accurate temperature of a print head. The present disclosure is an ink jet printing apparatus comprising a print head, a transmission unit configured to transmit a control signal, and a detection unit configured to detect a temperature by reading an output of a Di sensor after the transmission, and as drive conditions for driving a printing element, there is a plurality of drive conditions whose driving cycle of the printing element is different from one another, within a predetermined period in length in accordance with the driving cycle, transmission of a control signal and temperature detection are performed, a part of a line used for transmission of the control signal and a part of a line connected with the Di sensor are in common.

Abstract: A printing apparatus, which uses a printhead including a circuit configured to inspect an ink discharge status of a selected nozzle using a temperature detection element, causes the printhead to inspect the ink discharge status by changing a threshold value for judging a detection result of the temperature detection element, in order to judge the ink discharge status in a state in which a heater in the selected nozzle is driven by each of a first pulse and a second pulse whose waveform is different from that of the first pulse, obtains first information about a change point where a judgment result obtained by the first pulse changes, and second information about a change point where a judgment result obtained by the second pulse changes, and sets the threshold value, based on the first and second information.

Abstract: A printing apparatus, which uses a printhead including a circuit configured to inspect an ink discharge status of a selected nozzle using a temperature detection element, causes the printhead to inspect the ink discharge status by changing a threshold value for judging a detection result of the temperature detection element, in order to judge the ink discharge status in a state in which a heater in the selected nozzle is driven by each of a first pulse and a second pulse whose waveform is different from that of the first pulse, obtains first information about a change point where a judgment result obtained by the first pulse changes, and second information about a change point where a judgment result obtained by the second pulse changes, and sets the threshold value based on the first and second information.

Abstract: A printing apparatus, which uses a printhead including a circuit configured to inspect an ink discharge status of a selected nozzle using a temperature detection element, causes the printhead to inspect the ink discharge status by changing a threshold value for judging a detection result of the temperature detection element, in order to judge the ink discharge status in a state in which a heater in the selected nozzle is driven by each of a first pulse and a second pulse whose waveform is different from that of the first pulse, obtains first information about a change point where a judgment result obtained by the first pulse changes, and second information about a change point where a judgment result obtained by the second pulse changes, and sets the threshold value based on the first and second information.

Abstract: An object of the present disclosure is to acquire an accurate temperature of a print head. The present disclosure is an ink jet printing apparatus comprising a print head, a transmission unit configured to transmit a control signal, and a detection unit configured to detect a temperature by reading an output of a Di sensor after the transmission, and as drive conditions for driving a printing element, there is a plurality of drive conditions whose driving cycle of the printing element is different from one another, within a predetermined period in length in accordance with the driving cycle, transmission of a control signal and temperature detection are performed, a part of a line used for transmission of the control signal and a part of a line connected with the Di sensor are in common.

Abstract: A printing apparatus, that uses a printhead including a circuit configured to inspect an ink discharge status of a selected nozzle using a temperature detection element, causes the printhead to inspect the ink discharge status by changing a threshold value for judging a detection result of the temperature detection element, in order to judge the ink discharge status in a state in which a heater in the selected nozzle is driven by each of a first pulse and a second pulse whose waveform is different from that of the first pulse, obtains first information about a change point where a judgment result obtained by the first pulse changes, and second information about a change point where a judgment result obtained by the second pulse changes, and sets the threshold value, based on the first and second information.

Abstract: According to an embodiment of this invention, a printing apparatus using a printhead that includes an inspection circuit for inspecting an ink discharge status for each nozzle performs the following processing. The apparatus selects a nozzle as a target of inspection of the ink discharge status, sets a threshold value for inspecting a detection result of a temperature detection elements corresponding to the selected nozzle, and uses the inspection circuit and the set threshold value. The apparatus receives, from the printhead, an inspection result for the selected nozzle, determines, based on the received inspection result, a threshold value to be used by the inspection circuit for inspecting the discharge status of the selected nozzle in a subsequent inspection, and stores the determined threshold value in a memory.

Abstract: An image forming apparatus comprises: a printhead in which a plurality of element substrates for discharging a print material are arranged; a heating unit that maintains a temperature within the element substrate at a target temperature for each of the plurality of element substrates; a detection unit that detects the temperature within the element substrate for each of the plurality of element substrates; and a control unit that, for each of the plurality of element substrates, compares a highest temperature within the element substrate that is detected by the detection unit with a predetermined threshold, and if the highest temperature exceeds the predetermined threshold, sets the target temperature for the element substrate a temperature which is higher than a target temperature set when the highest temperature does not exceed the predetermined threshold and lower than the predetermined threshold.