Abstract: An example system may include a plurality of print devices, a supply attachment, and a device remote to the plurality of print devices. The plurality of print devices may receive the supply attachment. The device remote to the plurality of print devices may receive signals via the supply attachment that are indicative of print device information data from the plurality of print devices.

Abstract: A method at a print device may include receiving, from a supply, signals indicative of a print functionality from a set of authorizable functionalities for the print device. The set of authorizable functionalities may comprise: (1) a color depletion print mode, (2) an increased resolution print mode, (3) a refill pump increased speed mode, or a combination thereof. The method may also include enabling the print functionality on the print device based on the received signals.

Abstract: A print supply to connect to a printing device to provide a print material to the printing device that includes a machine and human readable print material gauge system, that includes an integrated circuit including a data interface to transfer print material level information describing a level of print material within the print supply and a display to represent the level of print material within the print supply.

Abstract: In an example implementation, a method of forming a three-dimensional (3D) part includes spreading a layer of build material over a print bed, and heating the layer of build material during each of multiple consecutive carriage passes over the print bed to maintain printed portions of the build material above a melting temperature for the duration of the consecutive carriage passes.

Abstract: An example printing device and method of the printing device is disclosed. A print substance formulation is modulated based on the process characteristic for a selected medium. A print substance is delivered to the selected medium according to the modulated print substance formulation.

Abstract: Examples of a user interface (UI) for depletion level selection are described herein. In some examples, a control element is displayed in a UI to select a color depletion level for a color printing substance of a printing device. A predicted cost-per-page to print is displayed in the UI based on based on a selected color depletion level. A color map for the printing device is determined based on the selected color depletion level and a separate black depletion level.

Abstract: In one example method, a determination is made via a processor that a document is to be printed using a printer including a printhead assembly and a printhead accessory based on a received print job. A determination is made via the processor that a first portion of the document is to be printed by the printhead assembly and a second portion is to be printed by the printhead accessory based on a characteristic of the printhead accessory. The first portion of the document is printed via the printhead assembly and the second portion of the document is printed via the printhead accessory.

Abstract: A print liquid supply apparatus or interface structure to be connected to a print system comprises a liquid channel, liquid interface and integrated circuit contact pads.

Abstract: In some examples, an additive manufacturing process may be operated by a method that includes depositing a plurality of preliminary layers of build material over a build surface and applying thermal energy governed by closed-loop control to heat the preliminary layers. The method includes analyzing a temperature distribution across a layer of the preliminary layers to map the locations of any hot spots relative to the build surface. The method includes selecting a spray pattern to apply a cooling agent to the mapped locations.

Abstract: According to one example, there is provided a method of generating three-dimensional objects in a three-dimensional printing system comprising a pair of movable build modules. The method comprises moving a first build module into a build position, executing a 3D print job in the first build module, moving the first build module into a post-build position, performing post-processing operations on the first build module, moving a second build module into the build position, and executing a 3D print job in the second build module.

Abstract: Example printer finishing apparatus are described herein. An example printer disclosed herein includes an alignment guide, a track to align a sheet relative to the alignment guide, a clamp to move between a raised position and a lowered position relative to the sheet, and a force applicator coupled to the clamp. The force applicator is to cause the sheet to engage the alignment guide when the clamp is in the lowered position.

Abstract: A method for filling a reservoir of a printing device that includes conducting an unattended refill process of an internal reservoir in response to a detection of a fluid supply unit. In an example, the supply dock fluidically, electrically, and mechanically couples to the fluid supply unit to the printing device.

Abstract: An example color resource is generated. A source color from a first color space is converted to a corresponding greyscale color in a greyscale color space. The greyscale color includes a first luminosity amount. A black channel amount is adjusted to a depletion color from a second color space to form a target color in the second color space. The depletion color corresponds with a transformation of the source color into the second color space. The depletion color includes a second luminosity amount, and adjusting the black channel includes matching the second luminosity amount in the target color with the first luminosity amount.

Abstract: In one example, a control process for an additive manufacturing machine includes displacing a platform, measuring the actual displacement of the platform, determining that the actual displacement varies from a nominal displacement, and determining an amount of an agent to be applied to build material layered on the displaced platform based on the determined variation.

Abstract: A printing device interface to receive a fluid supply may include a fluid dock arranged on an external surface of a housing of the printing device, the fluid dock further arranged to receive a mechanical interface of a fluid supply wherein the arrangement of the fluid dock on the external surface of the housing enables use of a center of mass and weight of the fluid supply to maintain a mechanical, fluidic, and electrical connection with the fluid supply.

Abstract: A valve mechanism in a supply station for coupling to a build material container and a method for operating the valve mechanism are provided. The valve mechanism includes a valve body having a top opening, a bottom opening, and a front opening. A diverter valve in the valve body is operated by a valve actuator, wherein the diverter valve directs build material from the top opening to the bottom opening when the valve actuator is in a first position and directs build material from the top opening into a build material container through the front opening when the valve actuator is in a second position.

Abstract: An example computer-readable medium storing machine-readable instructions that, when executed by a processor, cause the processor to receive an image, identify a first color region in the image, the first color region having a color level below a color level threshold, and fortify the first color region.

Abstract: In some examples, an apparatus can include a pawl including an anti-rotation surface and a spring, and a valve housing including a wedge, where the spring biases the pawl to a first position in response to the valve housing being at a closed position such that the wedge of the valve housing contacts the anti-rotation surface of the pawl to prevent rotation of the valve housing at the first position of the pawl.

Abstract: An extraction pump of a printing device fluidically connected to a reservoir of the printing device is set to a specified rotational velocity. A pulse-width modulation (PWM) value of the extraction pump correspondingly increases until the extraction pump rotates at the specified rotational velocity. While the power of the extraction pump is monitored, a power of a supply pump of the printing device fluidically connected between the extraction pump and the reservoir is continually increased; the power of the extraction pump correspondingly decreases to maintain rotation of the extraction pump at the specified rotational velocity. Responsive to the power of the extraction pump decreasing to a characterized value for the specified rotational velocity, the power of the supply pump ceases being increased.

Abstract: Examples for cost generation for a common print substance supply are described herein. In some examples, signals indicative of an amount of print substance consumed by a plurality of printing devices are received at a computing device. Signals indicative of a cost corresponding to the amount of print substance consumed by each printing device of the plurality of printing devices are generated at a processor of the computing device based on the received signals. The cost is also generated based on a device identifier, a customer identifier, a print media identifier, or a combination thereof. The signals indicative of the cost for each printing device are transmitted.