A three-dimensional printing system to print three-dimensional objects and a method of printed are disclosed. The system includes a printing apparatus to print three-dimensional objects and a controller to receive data from a material supply source and to control said printing apparatus.

A logic circuitry package for a replaceable print apparatus component comprises an interface to communicate with a print apparatus logic circuit, and at least one logic circuit. The logic circuit may be configured to identify, from a command stream received from the print apparatus, parameters including a class parameter, and/or identify, from the command stream, a read request, and output, via the interface, a count value in response to a read request, the count value based on identified received parameters.

Examples of a print liquid supply unit are described herein. In some examples, the print liquid supply unit includes an electrical interconnect. In some examples, the electrical interconnect is sealed in a supply joint from an outside of the supply unit to an inside of the supply unit. In some examples, the supply joint is welded to join housing components of the supply unit.

An image recording device includes a display panel, a cartridge mount, an information input interface, memory, and a controller. The controller obtains service provider information through the information input interface, stores the obtained service provider information in the memory, obtains first identification information or second identification information related to a cartridge mounted in the cartridge mount, sets an operation mode to a first mode in response to obtaining the first identification information, sets the operation mode to a second mode in response to obtaining the second identification information, causes the display panel to display a type of the cartridge in response to setting the operation mode to the first mode, and causes the display panel to display the service provider information in response to setting the operation mode to the second mode.

A printing system receives print jobs having pages that are separated by different levels of ink use to print the pages. The number of pages for different ink use levels are determined as well as the cost estimation to print the different pages. Ink use and cost estimates are provided on a granular level as opposed to overall ink use and costs for printing a print job. Modifications are made to one or more pages to lower ink use for those specific pages as opposed to the print job as a whole. The printing system displays the different ink use levels as well as the cost estimates.

A printing system receives print jobs having pages that are separated by different levels of ink use to print the pages. The number of pages for different ink use levels are determined as well as the cost estimation to print the different pages. Ink use and cost estimates are provided on a granular level as opposed to overall ink use and costs for printing a print job. Modifications are made to one or more pages to lower ink use for those specific pages as opposed to the print job as a whole. The printing system displays the different ink use levels as well as the cost estimates.

An example method comprises identifying a plurality of supply levels corresponding to a set of print supplies of a print device. The example method further comprises coordinating depletion of the set of print supplies by selecting between black print and process black print for a print job of the print device based on the plurality of supply levels.

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.

In an example, a method includes, by logic circuitry associated with a replaceable print apparatus component installed in a print apparatus, responding to a sensor data request received from the print apparatus by returning a first response; receiving a calibration parameter from the print apparatus; and returning a second response which is different from the first response.

A printing apparatus counts an ink quantity in an ink tank in accordance with consumption of ink from the ink tank, updates and holds a count value obtained by the count in a counter, and detects whether ink injection to the ink tank has been done before execution of sensing by a sensing unit configured to sense whether a predetermined quantity of ink is present in the ink tank. If sensing by the sensing unit is executed, the apparatus reads out a preceding sensing result from a memory that stores a sensing result of presence/absence of the ink by the sensing unit, verifies a transition between the preceding sensing result and a current sensing result, and controls operations of reset of the count value held by the counter and the count based on the transition and a result of the detection.