Abstract: A conditioner includes a pressure roller assembly, a tension roller assembly, a heating element, a pressure roller drive motor, a tension drive motor, and a controller. The heating element heats the pressure roller assembly. The pressure roller drive motor rotates the pressure roller assembly. The tension drive motor rotates the tension roller assembly. The controller receives a print job complete notification to initiate a conditioner shutdown. In response to the print job complete notification, the controller turns off the tension drive motor. The controller sets the heating element to a predetermined temperature and waits a first predetermined period. In response to the first predetermined period elapsing, the controller turns off the heating element. With the heating element turned off, the controller turns off the pressure roller drive motor.

Abstract: In some examples, a non-transitory-machine readable medium can store instructions executable by a processing resource to select a special media mode from a plurality of special media modes based on a weight or a type of print media and cause a conditioning device to condition the print media in accordance with the special media mode.

Abstract: An example a media sensor device may comprise a light source positioned on a first side of a media pathway, a light path to receive a light from the light source and direct the light through a plurality of openings from the first side of the media pathway to a second side of the media pathway, and a light sensor on the second side of the media pathway to detect print media within the light path based on an intensity of light received from the light source, wherein a heated enclosure aligns the light sensor with the light path.

Abstract: In some examples, a system is disclosed that includes a roller assembly for a printer. The roller assembly includes a pressure roller, a belt coupled, a drive assembly to rotate the pressure roller and to urge the pressure roller into the belt, a heater to apply heat to the belt, and a temperature sensor to detect a temperature of the belt. In addition, the roller assembly includes a controller to increase a pressure applied to the pressure roller from a first to a second pressure in pressure in response to a temperature of the belt being greater than or equal to a first temperature threshold. Also, the controller is to initiate an advance of a print media to contact the belt in response to the temperature of the belt being greater than or equal to a second, higher temperature threshold.

Abstract: A handheld printer may include an array of fluid ejectors, a sensor to output speed variation signals indicative of variations in speeds of movement amongst the array of fluid ejectors as the handheld printer is moved across a print target;and a controller to output control signals adjusting a relative timing of fluid ejection by the fluid ejectors based on the speed variation signals.

Abstract: An apparatus calibrates the optical sensor to calibrate the distance measured by the sensor with the expected distance using a calibration surface at the expected distance.

Abstract: In one example, a print substance detector can include a sensor pin, an actuator coupled to the sensor pin to adjust a distance between a surface of the sensor pin and a base portion of a print substance reservoir, and a controller to send instructions to the actuator to adjust the distance of the sensor pin based on an indication of an operation associated with the print substance reservoir.

Abstract: A printing apparatus includes a media bin and a sensor, directed toward the media bin, having a first emitter and a receiver. The printing apparatus further includes a second emitter to emit photons toward the optical sensor, and a controller. The controller determines presence of a print media on the media bin based on a count of photons received from a source other than the first emitter, including the second emitter.

Abstract: A method of controlling the ejection speed of a print job that includes, with a density module of a printing device, determining a density classifier based on a region of a plane where print fluid is to be printed for a plurality of sheets of media of a print job; determining a percentage of each sheet of media exceeding a threshold density classifier relative to a total sheet count of the print job; and, based on the percentage, initiating an assisted ejection of the print job from the printing device.

Abstract: A media sensing device may include an electromagnetic radiation source, a light guide located on an opposite side of a media feed path respective to the electromagnetic radiation source, and a photodetector to detect electromagnetic radiation from the electromagnetic radiation source and directed by the light guide. The photodetector detects the presence of media upstream from a heated pressure roller (HPR) in response to the media obstructing the detection of electromagnetic radiation from the electromagnetic radiation source.

Abstract: A printing apparatus uses a time of flight sensor to determine distance between the sensor and a surface facing the sensor, and uses a reflectivity value to determine presence of print media in a media bin.

Abstract: Examples of duplex printing and conditioning based on ink density are described. In an example, an ink density for a first printed side and an ink density for a second printed side of a duplex page are determined. The duplex page is printed and conditioned based on a highest ink density of the first printed side and the second printed side.

Abstract: In some examples, a media conditioner includes a conveying component to convey a sheet of printable media, a first heating element to heat a first portion of the conveying component, a second heating element to heat a second portion of the conveying component, and a controller. The controller is to provide a variable first power level to the first heating element and a variable second power level to the second heating element to cause the first and second heating elements to generate heat. In addition, the controller is to determine a first parameter based on the first power level and to determine a second parameter based on the second power level. The controller is also to produce a result indicator based on a result of a comparison between the first parameter and the second parameter.

Abstract: In some examples, a non-transitory-machine readable medium can store instructions executable by a processing resource to select a special media mode from a plurality of special media modes based on a weight or a type of print media and cause a conditioning device to condition the print media in accordance with the special media mode.

Abstract: According to examples, a printing apparatus may include an output bin that is laterally translatable between a retracted position and an extended position. The printing apparatus may also include a sensor to detect a height of a stack of media on the output bin while the output bin is in the retracted position and a controller. The controller may determine whether the detected height of the stack of media on the output bin exceeds a certain level and in response to a determination that the detected height of the stack of media exceeds the certain level, laterally translate the output bin from the retracted position to the extended position.

Abstract: In an example, a fluid level sensor comprises a vibrational paddle wherein an edge of the vibrational paddle comprises a fluid surface contact point having a peaked profile.

Abstract: A conditioner includes a pressure roller assembly, a tension roller assembly, a heating element, a pressure roller drive motor, a tension drive motor, and a controller. The heating element heats the pressure roller assembly. The pressure roller drive motor rotates the pressure roller assembly. The tension drive motor rotates the tension roller assembly. The controller receives a print job complete notification to initiate a conditioner shutdown. In response to the print job complete notification, the controller turns off the tension drive motor. The controller sets the heating element to a predetermined temperature and waits a first predetermined period. In response to the first predetermined period elapsing, the controller turns off the heating element. With the heating element turned off, the controller turns off the pressure roller drive motor.

Abstract: A printing apparatus uses a time of flight sensor to determine distance between the sensor and a surface facing the sensor, and uses a reflectivity value to determine presence of print media in a media bin.

Abstract: In some examples, a system is disclosed that includes a roller assembly for a printer. The roller assembly includes a pressure roller, a belt coupled, a drive assembly to rotate the pressure roller and to urge the pressure roller into the belt, a heater to apply heat to the belt, and a temperature sensor to detect a temperature of the belt. In addition, the roller assembly includes a controller to increase a pressure applied to the pressure roller from a first to a second pressure in pressure in response to a temperature of the belt being greater than or equal to a first temperature threshold. Also, the controller is to initiate an advance of a print media to contact the belt in response to the temperature of the belt being greater than or equal to a second, higher temperature threshold.

Abstract: A media sensing device may include an electromagnetic radiation source, a light guide located on an opposite side of a media feed path respective to the electromagnetic radiation source, and a photodetector to detect electromagnetic radiation from the electromagnetic radiation source and directed by the light guide. The photodetector detects the presence of media upstream from a heated pressure roller (HPR) in response to the media obstructing the detection of electromagnetic radiation from the electromagnetic radiation source.