Abstract: A sensor circuit for a replaceable print apparatus component comprises an interface to transmit signals with respect to a print apparatus logic circuit, and further comprises, connected to the interface, at least two sensor cell arrays, each array including nominally the same cells, the cells of one array being nominally different than the cells of the other array, and at least one single cell sensor that is nominally different than the other cells.

Abstract: A system for maintaining a desired pressure difference between a first pressure within a chamber and a reference pressure at a reference space. The system may include a peristaltic pump located along a duct that connects the chamber with the reference space. The system may further include a pressure sensor for monitoring an actual pressure difference between the first pressure within the chamber and the reference pressure at the reference space. The system may also include a controller for receiving a signal from the pressure sensor for determining the actual pressure difference from the pressure sensor and for operating the peristaltic pump, in accordance with the actual pressure difference and the desired pressure difference, to increase, decrease or leave unchanged the pressure within the chamber so as to maintain the actual pressure difference within predetermined proximity to the desired pressure difference.

Abstract: An example device capable of predicting print substance end-of-life (EOL) comprises a container to hold a print substance, the container comprising a refill port through which print substance is to be introduced into the container. The example device also comprises a processor to receive signals indicative of an amount of print substance introduced via the refill port. The processor is also to predict a print substance end-of-life (EOL) based on the amount of print substance introduced.

Abstract: A printer includes an ink tank, a print head that performs printing by using ink in the ink tank, a light source that emits light into the ink tank, a sensor that detects light incident from an ink tank side in a period during which the light source emits light and outputs pixel data, and a processing section that determines an ink amount based on an output of the sensor. A pitch of a plurality of lenses is k times a pixel pitch of the sensor, k being an integer of 2 or more, and the processing section detects the ink amount based on a sum of outputs of k continuous pixels.

Abstract: A container stores a fluid for use in an ink jet printer. The container includes: a casing that defines a storage space for storing the fluid, and has an opening communicating with the storage space; a film that covers the opening and seals the storage space; and a film attachment section that fixes the film to the casing. The casing includes a first surface that surrounds a periphery of the opening, and faces the film, and a second surface that surrounds the opening at a position farther from the opening than the first surface, has an angle intersecting the first surface, and faces the film, and the film attachment section is provided on the second surface.

Abstract: A recording apparatus including: a recording head that includes an ejection component that ejects a liquid; a circulation unit configured to perform a circulation operation of circulating the liquid in a circulation route including the recording head; a cleaning mechanism that performs a cleaning process with respect to the recording head; and a preliminary ejection unit configured to perform a preliminary ejection operation of preliminarily ejecting the liquid from the ejection component. The cleaning mechanism performs the cleaning process in a state in which circulation of the liquid is stopped, and at least one of the circulation operation by the circulation unit and the preliminary ejection operation by the preliminary ejection unit is performed after the cleaning process.

Abstract: An example system includes an ink tank including a feeder tank, wherein the feeder tank is to hold a fluid therein, the feeder tank having a port, the feeder tank being under a negative gauge pressure. The example system further includes a print cartridge in fluid communication with the port of the feeder tank, the print cartridge having a nozzle plate. The port of the feeder tank is positioned to a lower corner of the feeder tank distally to the print cartridge, wherein the nozzle plate is disposed above a predetermined level within the feeder tank when the system is not tilted, the predetermined level corresponding to a free surface of a predetermined volume of the fluid when the system is not tilted. When the system is tilted to position the nozzle plate below the port, the volume of fluid uncovers the port.

Abstract: Aspects relating to an ink container for an image reproduction device are described herein. The ink container includes a body and an electrical connection. The body is formed by molding a polymer material having a metal seed layer. The electrical connection is formed by metallizing a plurality of traces in the metal seed layer. The electrical connection extends from an inside wall of the ink container to an outer wall. A width of the electrical connection on the inside wall of the ink container gradually varies from a bottom of the ink container to a rim.

Abstract: A cartridge includes a concave portion. The concave portion has an opening, first and second side walls, and a bottom wall, and the bottom wall has a tilted surface tilted. The tilted surface is provided with a cartridge side terminal group. The first side wall is provided with a first restriction portion which restricts movements in a +Z axis direction and a +X axis direction of an apparatus side terminal unit, and the second side wall is provided with a second restriction portion which restricts movements in the +Z axis direction and a ?X axis direction of an apparatus side terminal unit.

Abstract: A bag-in-box fluid supply may include a bag comprising a spout extending therefrom, the spout including a flange coupled to a surface of the bag and comprising a lip formed on the spout distal to the bag; a box formed around the bag to maintain the bag therein; a wedge to wedge a surface of the box between the lip and a surface of the bag; and a fluid interface to fluidically interface with the spout of the bag, the fluid interface including a fluidic channel and a collar disposed on a first end of the fluidic channel to secure the fluid interface to the spout.

Abstract: An inkjet printing apparatus includes a first and second tanks, and a printer section including an inkjet head which ejects ink droplets toward a printing medium. The inkjet printing apparatus includes a first supply system which supplies ink from the first tank to the second tank, a second supply system which includes an ink supply pump and supplies ink from the second tank to the printer section, and a remaining amount detection unit which detects the amount of ink remaining in the first tank. The remaining amount detection unit calculates the amount of ink transferred from the first tank to the second tank in a measurement period during which ink is supplied from the first tank to the second tank, based on an increase in the amount of the ink stored in the second tank in the measurement period and the operation state of the pump in the measurement period.

Abstract: An image forming device and an operating method are provided. The operating method included outputting a notification indicating that a cartridge in an image forming device needs to be refilled with toner, in accordance with the notification, performing a preparatory operation for entering a refill mode when it is determined that an operation mode of the image forming device is to be switched to the refill mode for refilling the cartridge with toner, when the preparatory operation is completed, controlling the image forming device such that only an operation related to the toner refilling is performed according to the refill mode, and when the refill mode is terminated, switching the operation mode of the image forming device to a job mode for performing a predetermined job in the image forming device.

Abstract: A printer is provided that includes a first ink storage unit storing ink, a second ink storage unit storing ink supplied from the first ink storage unit, a discharge head configured to discharge ink, a carriage configured to move the discharge head and the second ink storage unit, and a tube coupling the first ink storage unit and the second ink storage unit. The second ink storage unit includes an ink supplying port to which the tube is coupled, a communication hole communicating making inside and outside of the second ink storage unit communicate with each other, and a light-transmissive surface which is transparent or translucent. The communication hole and a portion of the light-transmissive surface are located at a position vertically higher than a front surface of the carriage in a state where the second ink storage unit is mounted on the carriage.

Abstract: An inkjet recording apparatus configured to perform recording operation by ejecting ink at least from a first recording head, includes an ink tank configured to contain the ink to be supplied to the first recording head, a tube configured to connect the first recording head and the ink tank, and a carriage including a first mounting portion on which the first recording head is mounted, a second mounting portion on which a second recording head is detachably mounted, and a contact portion electrically connected to the second recording head, and configured to reciprocate. A protection member protecting the contact portion can be detachably mounted on the second mounting portion.

Abstract: A system for detecting a filling level in a printing fluid waste container comprises a waste container that collects excess printing fluid in a reservoir, and an optical sensor unit that detects a filling level of the reservoir on a filling reference surface.

Abstract: A liquid discharge device includes a case receiving a cartridge having a first liquid chamber, a tank having a second liquid chamber, a head, a liquid level sensor and a controller configured to: based on receiving, from the liquid level sensor, a second signal after receiving a first signal, determine a total liquid amount Vt as a fixed value A; receive a second discharge instruction; update a second count value with a value equivalent to an amount of the liquid instructed to be discharged by the second discharge instruction; subtract the second count value from the total liquid amount Vt determined as the fixed value A to calculate the total liquid amount Vt; and determine the liquid amounts Vc and Vs based on the obtained total liquid amount Vt.

Abstract: To provide a liquid storage container equipped with a plug member that can prevent leakage of a liquid from the liquid storage container and can be opened without causing scatter of the liquid, and a liquid ejection apparatus equipped with the liquid storage container. For the purpose, at least one of a connection part of the convex part with the cover part and an apical part of the convex part most apart from the connection part is provided offset from the centroid of the cover part, seen from a direction orthogonal to an opening surface of a supply port in a state that the plug member is mounted on a supply port of the liquid storage container.

Abstract: A liquid supply unit supplies predetermined liquid from a liquid storage container storing the liquid to a liquid injection head for injecting the liquid. The liquid supply unit includes a pressure chamber, a first supply passage, a second supply passage, a bypass supply passage and a pressurizing mechanism. The pressure chamber is capable of storing the liquid. The first supply passage allows communication between the liquid storage container and the pressure chamber. The second supply passage allows communication between the liquid injection head and the pressure chamber. The bypass supply passage has an upstream end in a liquid supply direction connected to the first supply passage and a downstream end joining the second supply passage. The pressurizing mechanism is arranged in the bypass supply passage and pressurizes the liquid flowing in the bypass supply passage.

Abstract: A liquid consuming device includes an installation case configured to receive a cartridge having a first liquid chamber storing a liquid, a tank having a second liquid chamber, a flow path communicated with the first and second liquid chambers, a head communicated with the second liquid chamber and a first controller configured to: determine a total amount Vt of a first liquid amount in the first liquid chamber that is installed in the installation case to communicate with the second liquid chamber through the flow path and a second liquid amount in the second liquid chamber that communicates with the first liquid chamber of the cartridge installed in the installation case through the flow path; and transmit, through a first communication interface that is connected to an external device, total amount information indicating the determined total amount Vt.

Abstract: A printing apparatus comprises a main tank, an intermediate tank, and a control unit controlling an amount of the ink stored in the intermediate tank by a normal replenishing operation for increasing an ink remaining amount to a normal amount more than a first reference amount by feeding the ink from the main tank to the intermediate tank if the ink remaining amount falls below the first reference amount. The control unit controls the amount of the ink stored in the intermediate tank by an extraordinary replenishing operation for increasing the ink remaining amount to a second reference amount by feeding the ink from the main tank to the intermediate tank if the ink remaining amount falls below the second reference amount less than the first reference amount when the main tank held is exchanged.

Abstract: A liquid ejection device includes a liquid ejection head and a liquid supply unit configured to supply liquid to the liquid ejection head. The liquid ejection head includes a plurality of liquid discharge holes, individual passages configured to individually supply the liquid to the respective liquid discharge holes, and a common passage configured to supply the liquid to the individual passages. The liquid supply unit includes a pressure chamber capable of storing the liquid, a first supply passage allowing communication between the liquid storage container and the pressure chamber, a second supply passage allowing communication between an upstream side of the common passage and the pressure chamber, a return passage allowing communication between a downstream side of the common passage and the pressure chamber, and a pump mechanism capable of circulating the liquid at least through the second supply passage, the common passage and the return passage.

Abstract: A liquid consuming device includes an installation case configured to receive a cartridge having a first liquid chamber storing a liquid, a tank having a second liquid chamber, a flow path communicated with the first and second liquid chambers, a head communicated with the second liquid chamber and a first controller configured to: determine a total amount Vt of a first liquid amount in the first liquid chamber that is installed in the installation case to communicate with the second liquid chamber through the flow path and a second liquid amount in the second liquid chamber that communicates with the first liquid chamber of the cartridge installed in the installation case through the flow path; and transmit, through a first communication interface that is connected to an external device, total amount information indicating the determined total amount Vt.

Abstract: Provided is an electronic apparatus including an image reading unit that reads a document by using a first sensor module having m linear image sensor chips, an ink tank, a print head, and a second sensor module having n (n<m) linear image sensor chips and detecting light incident from the ink tank, and a processing unit that detects an amount of ink in the ink tank based on an output of the second sensor module.

Abstract: A liquid discharge device includes a storage tank, a discharge head, a liquid feeder, a supply tank, a liquid path, a branch path, and a flow regulator. The liquid feeder is configured to feed liquid from the storage tank to the discharge head in a liquid feed direction. The supply tank is disposed upstream of the discharge head in the liquid feed direction, to store the liquid fed by the liquid feeder while being in a state open to atmosphere. The liquid path is configured to flow the liquid from the liquid feeder to the supply tank. The branch path is connected to the liquid path and configured to cause part of the liquid to branch from the liquid path. The flow regulator is disposed downstream of the discharge head in the liquid feed direction and configured to control a flow rate of the liquid flowing into the discharge head.

Abstract: In an information processing apparatus, a processor acquires first and second information on residual quantities of printing agent stored in first and second cartridges respectively. The first cartridge is mounted on a portion including a tank. The processor generates display screen data including first and second objects. The first object has a first position corresponding to a minimum residual quantity of the printing agent in a first state where the printing agent remains in the first cartridge. The second object has a second position corresponding to a maximum residual quantity of the printing agent, and a third position corresponding to a minimum residual quantity of the printing agent in a second state where the printing agent does not remain in the first cartridge but remains in the tank. The first position and one of the second and third positions are aligned at a reference position.

Abstract: In an image-recording device, a cartridge has a first chamber, a first outlet, and a first sensor. A mount body includes a tank in connection with the cartridge, and a second sensor. The tank has an inlet, and a second chamber. The liquid in the first chamber is capable of flowing into the second chamber via the first outlet of the cartridge and the inlet of the tank. The first sensor outputs a first signal when a level of the liquid in the second chamber is higher than a first position, and outputs a second signal when the level is lower than the first position. The second sensor outputs a third signal when the level is higher than a second position, and outputs the fourth signal when the level is lower than the second position.

Abstract: A liquid discharge device includes a case receiving a cartridge having a first liquid chamber, a tank having a second liquid chamber, a head, a liquid level sensor, an alarm and a controller configured to: receive a first signal or a second signal when a position of a liquid level in the second liquid chamber is equal to or higher than or lower than a predetermined position; operate the alarm when receiving the second signal after the first signal; cancel the operation of the alarm based on determining of installation of the cartridge; and operate the alarm based on determining that a first elapsed time from a time when determining the installation of the cartridge reaches a predetermined time and the second signal is received from the liquid level sensor without receiving the first signal.

Abstract: An example device capable of predicting print substance end-of-life (EOL) comprises a container to hold a print substance, the container comprising a refill port through which print substance is to be introduced into the container. The example device also comprises a processor to receive signals indicative of an amount of print substance introduced via the refill port. The processor is also to predict a print substance end-of-life (EOL) based on the amount of print substance introduced.

Abstract: When an adjustment sheet is set on a recording surface of a medium, the adjustment sheet is transported together with the medium in a transport direction by a transport unit of a recording device. The adjustment sheet includes a first surface that contacts the recording surface, and a second surface that is a surface located opposite to the first surface and includes an adjustment region being a region in which an adjustment pattern detectable by a detection unit of the recording device is formed. A prescribed pattern has been formed in a region different from the adjustment region on the second surface.

Abstract: Provided is a printer including an ink tank, a print head, a light source that irradiates the ink tank with light, a photoelectric conversion device that detects light incident from the ink tank, and a processing unit. The processing unit detects an amount of ink in the ink tank based on a lowest position among the positions where a light amount detected by the photoelectric conversion device satisfies a given condition.

Abstract: In one example a fluid level sensing device is described. The device includes a sensing die having a number of fluid level sensors disposed thereon and a number of control devices, each control device corresponding to one of the number of fluid level sensors. A control device includes a comparing device to determine a state of a corresponding fluid level sensor. A state of the fluid level sensor is selected from the group consisting of a fluid state and a no-fluid state. Each control device also includes a non-volatile memory device corresponding to the comparing device to indicate whether the corresponding fluid level sensor is at the fluid state or the no-fluid state. A control device also includes a locking device to irreversibly set the non-volatile memory device to the no-fluid state independent of a write command from a controller.

Abstract: The first printing system SY1 includes a printing apparatus 4 including an ink container and a server 2 coupled to the printing apparatus 4 via a network NW, wherein the server 2 acquires maintenance information including residual ink amount information indicating an residual amount of ink in the ink container of the printing apparatus 4, determines whether a maintenance process is configured to be performed based on the acquired maintenance information, and instructs the printing apparatus 4 to perform the maintenance process when it is determined that the maintenance process is configured to be performed.

Abstract: A droplet-discharge-apparatus includes a first-head, a first-ink-container storing first-ink, a second-head, a second-ink-container storing second-ink, a cleaning-liquid-container storing cleaning-liquid, a common-flow-path-system, a cleaning-liquid-flow-path, a first-pomp feeding the first-ink from the first-ink-container to the second-ink-container through the common-flow-path-system, a second-pomp feeding the cleaning-liquid from the cleaning-liquid-container to the first-ink-container through the cleaning-liquid-flow-path and the common-flow-path-system, a first-valve controlling a liquid flow rate between the common-flow-path-system and the first-ink-container, a second-valve controlling a liquid flow rate between the common-flow-path-system and the second-ink-container, a third-valve controlling a liquid flow rate between the common-flow-path-system and the cleaning-liquid-flow-path, and a control-unit.

Abstract: The image recording apparatus has a head, a tank, a case that receives a cartridge, and a controller. When the cartridge is installed in the case of the image recording apparatus, the liquid in the cartridge flows to the tank by a difference between a liquid level in the cartridge and a liquid level in the tank. The controller controls a display to display a first notification indicating an ink cartridge based on receiving a first signal output from a sensor when a liquid level in an ink chamber reached a specific position. The controller, after receiving the first signal from the sensor, counts a count value indicating an amount of discharged liquid from the head. Further, the controller, in response to the count value reaching a first threshold, controls the display to display a second notification.

Abstract: The internal space of a storing container is separated by a flexible membrane into a first storing space storing an ejection material and a second storing space storing an operating liquid. A change in electrical property of the flexible membrane resulting from entry of at least one of the ejection material and the operating liquid to the inside of the flexible membrane is detected.

Abstract: A liquid ejecting head unit including: an ejection surface including nozzles being arranged in a first-direction; and a flow-path-member including a flow path communicating with the nozzles, wherein the ejection surface has a planar shape including a first-portion and a second-portion, the first-portion and the second-portion are arranged in the first-direction with respect to each other, the first-portion spans across a center-line of a rectangle having a minimum area that surrounds the ejection surface, the center-line extending parallel to the first-direction, the second-portion is located adjacent to the first-portion in the first-direction and shifted away from the center-line in a second-direction that substantially perpendicular to the first-direction, the flow-path-member includes first-connecting ports, at least one of the first-connecting ports communicating with the flow path, and the first-connecting ports overlap the second-portion in plan view of the ejection surface and are shifted away from ea

Abstract: In an image forming apparatus, a control unit (a) sets an ink residual estimation value of a subtank as a first reference value corresponding to a tank capacity of the subtank when ink empty is detected on an ink container, and determines whether the ink residual estimation value is less than the ink consumption estimation value of a subsequent page in a print job or not, and (b1) stops the print job if the ink residual estimation value is less than the ink consumption estimation value of the subsequent page and (b2) continues the print job if the ink residual estimation value is equal to or larger than the ink consumption estimation value of the subsequent page.

Abstract: An ink discharge device includes a plurality of recording heads and one damper. The plurality of recording heads respectively have nozzles which discharges an ink. The one damper is provided in common to the plurality of recording heads and reduces pressure variation of an ink in each of the recording heads. Each of the recording heads includes a head side coupling. The damper includes a damper side coupling which is connected to the head side coupling along an up/down direction. The damper side coupling is provided so as to be movable along the up/down direction.

Abstract: There is provided a liquid discharge apparatus including a conveyer, a carriage, a head and a controller. In a case of recording an image on a recording medium, the controller executes: obtaining information regarding a supply state of liquid from a liquid tank to the head in a case of executing each of recording passes; determining a moving velocity of the carriage with respect to each of the recording passes, based on the obtained information regarding the supply state; and adjusting a conveyance amount, by which the recording medium is conveyed in each of conveying operations, depending on moving velocities of the carriage determined with respect to two continuous recording passes, respectively, included in the recording passes, so as to adjust length in the conveyance direction of an overlap area in which recording areas by the two continuous recording passes overlap with each other.

Abstract: A liquid discharge device includes a case receiving a cartridge having a first liquid chamber, a tank having a second liquid chamber, a head, a liquid level sensor and a controller configured to: receive a first signal or a second signal when a position of a liquid level in the second liquid chamber is equal to or higher than or lower than a predetermined position; prohibit a liquid discharge through the head in a predetermined case; cancel the prohibition of the liquid discharge based on determining that the cartridge is installed in the case; and prohibit the liquid discharge based on determining that a first elapsed time from a time when determining that the cartridge is installed in the installation case reaches a predetermined time and the second signal is received from the liquid level sensor without receiving the first signal.

Abstract: A fluid ejection die includes a plurality of nozzles to eject fluid drops and a plurality of strain gauge sensors to sense strain. Each strain gauge sensor corresponds to a nozzle and passes the sensed strain to a controller to determine the health of the nozzle based on the sensed strain.

Abstract: In one example, a method for determining an out-of-liquid condition of a liquid supply for an inkjet printer. The method includes acquiring, during printing, a sequence of data points, each data point comprising a differential liquid/air pressure at the liquid supply measured with a sensor and a corresponding cumulative amount of liquid delivered from the liquid supply. The method further includes generating a curve using the data points. The method also includes determining, from a predetermined characteristic of the curve, whether the out-of-liquid condition exists. The characteristic is independent of at least one of a gain and an offset of the sensor.

Abstract: An example printing cartridge includes a sensing die including a plurality of sensing locations in thermal contact with a fluid container, an on-die controller to select a sensing location of the plurality of sensing locations to activate and to provide a variable threshold voltage, and a voltage comparator to compare a sensed voltage generated at a selected sensing location to the variable threshold voltage, and output time-based information based on the comparison, the time-based information representative of whether a fluid is present at a fluid level associated with the selected sensing location.

Abstract: A control device includes: a memory; and a controller. A printer includes: a head; and a carriage mounting the head thereon. The controller is configured to perform: selecting first speed information from among a plurality of pieces of speed information stored in the memory, the first speed information indicating a first speed; estimating an ink pressure related value using the first speed information, the ink pressure related value indicating an ink pressure for a first type of print printing an image by ejecting ink from the head while moving the carriage at the first speed; determining whether the ink pressure related value reaches a threshold value; executing the first type of print in response to determining that the ink pressure related value does not reach the threshold value; and executing a second type of print in response to determining that the ink pressure related value reaches the threshold value.

Abstract: An inkjet printing apparatus for forming images with ink droplets includes the following elements: an inkjet head, a plurality of holders for removably holding a plurality of ink tanks storing inks interchangeable with each other, branch pipes each having one end thereof connected to one of the ink tanks, a mixer provided at the other ends of the branch pipes, a pump for feeding the inks to the mixer, a feed pipe connecting the mixer and the inkjet head, and a controller for controlling ink feeding. The controller makes different a feed rate of the ink from each of the ink tanks.

Abstract: Embodiments of an apparatus, system and method for facilitating the tracking of consumable pharmaceutical articles are disclosed. A marking apparatus is configured to apply unique indelible identifiers to pharmaceutical articles at the point-of-sale. The indelible identifiers on the articles are visually or electronically readable to allow each respective article to be traced with respect to its manufacturer, prescribing physician, patient to whom it was prescribed, dispensing location, expiration date, dosage, or some combination thereof. An associated system and method may involve the provision of a remote database element configured to be in network communication between the marking apparatus, manufacturer, distributor, prescriber, dispensing location, scanning tool, or some combination thereof. The indelible identifier may initially be generated by the apparatus and then obtained and recorded by the remote database element.

Abstract: A quick connect assembly includes a connector housing and fluid connectors that fluidly couple an ink assembly and a print assembly. The quick connect assembly also includes conductive connectors that conductively couple hardware circuitry in the ink assembly with hardware circuitry in the print assembly. First and second portions of the connector housing mate with each other to couple the fluid connectors and to couple the conductive connectors. The first and second housing portions mate with each other by rotating the first housing portion and/or the second housing portion relative to the other of the first housing portion and/or the second housing portion.

Abstract: A liquid cartridge includes: a housing having a storage chamber; a liquid passage in communication with the storage chamber; a circuit board; a deformable member; and a movable surface. The liquid passage extends in a first lateral direction from the housing when the housing is in an operational posture. The circuit board is positioned higher than the storage chamber in a vertical direction perpendicular to the first lateral direction and vertically movable relative to the housing. The deformable member is positioned higher than the storage chamber and is lower than the circuit board. The deformable member is deformable vertically relative to the housing. The circuit board is movable vertically in accordance with deformation of the deformable member. The movable surface is positioned further in a second lateral direction opposite the first lateral direction than the circuit board. The movable surface faces upward and is vertically movable relative to the housing.

Abstract: A printer device includes: an ink circulation flow path in which ink is circulated; a discharge head that discharges the ink supplied from the ink circulation flow path; a circulation pump and a circulation motor that circulate the ink in the ink circulation flow path; a circulation filter provided in the ink circulation flow path; and control unit that determines a blocked state of the circulation filter and performs drive control of the circulation motor in accordance with a determination result, and the control unit drives the circulation motor in a first mode until it is determined that the circulation filter is in a blocked state, and after it is determined that the circulation filter is in a blocked state, the control unit drives the circulation motor in a second mode that provides a smaller circulation rate than the first mode.

Abstract: A liquid circulating apparatus includes a circulation route configured to circulate liquid through a liquid ejecting head, the circulation route including: a supply-side tank leading to a supply port of the liquid ejecting head; and a discharge-side tank leading to a discharge port of the liquid ejecting head, wherein the liquid is circulated by setting pressure in the supply-side tank higher than pressure in the discharge-side tank, and a sum of the pressure in the supply-side tank and the pressure in the discharge-side tank is set smaller when initial filling for filling the circulation route with the liquid is performed than when the liquid is circulated.