Method and devices for dynamically preventing printing errors caused by a media deformation are disclosed. In one example, a pen to print media space (PPS) distance is measured. A media deformation is identified in response to measuring the PPS distance. A corrective function is identified in response to identifying the media deformation. The corrective function identified is then performed. The proposed method provides for consistent quality across a print.

A method and a device as provided for printing a large surface which is situated, in particular, on a substrate which cannot be fed to a printing device. The method is distinguished by the fact that the perpendicular spacing Azo of a reference point of the device at a plurality of points which are distributed over the printing web from the surface to be printed is determined in each case at the points which are distributed over the printing web, and the perpendicular spacing Az of the print head from the surface to be printed is set in accordance with a previously recorded measured value. Here, the plurality of points can be distributed uniformly over the length of the printing web. The device for carrying out the method has a measuring device for contactless measurement of the spacing between a reference point of the device and the surface to be printed. Furthermore, the device has a control unit for evaluating the measured values and producing control pulses for setting the spacing Az of the print head from the surface to be printed.

Textile printing wherein the printing comprises: acquire, by a controller, a print job comprising an image and a set of print parameters; position a textile in a printing zone; acquire a calibration image of the textile and transferring the calibration image to the controller; determine, by the controller, a set of calibrated print parameters based on the calibration image and the set of print parameters; and print the image on the textile using the set of calibrated print parameters.

A first light emitter emits light toward a sheet. A first light receiver receives first reflected light from the sheet. A second light emitter is arranged downstream of the first light emitter in a conveyance direction of the sheet and emits light toward the sheet. A second light receiver receives second reflected light from the sheet. A measuring section measures first and second received light quantities of the first reflected light and the second reflected light. A moisture content calculator calculates a change in a moisture content of the ink in the sheet based on a difference between first and second moisture contents. The first moisture content is based on the first received light quantity and the second moisture content is based on the second received light quantity. A curling amount calculator calculates a curling amount of the sheet based on the change in the moisture content.

A printer includes a liquid discharge head configured to discharge a liquid to a print target, a holder configured to hold the print target, and a height detector configured to detect the print target on the holder at a first height and at a second height lower than the first height.

A printing apparatus includes a medium accommodation portion that accommodates a medium, a medium discharge port for discharging the medium, a medium transport section that transports the medium, an ejection head that ejects a liquid to the medium to form an image, and an image detection section that detects the image. The printing apparatus has a first mode and a second mode, the first mode being a mode in which the medium transport section transports the medium in a direction from the medium accommodation portion toward the medium discharge port, and the ejection head ejects the liquid to the medium, and the second mode being a mode in which the medium transport section transports the medium in a direction from the medium discharge port toward the medium accommodation portion, and the image detection section detects image information of the image formed on the medium.

A printer carriage comprises a sensor to be actuated when an actuation member coupled to the sensor contacts a raised portion in a printing target. A vertical position of the actuation member may be adjusted with respect to the printer carriage.

An ink jet recording apparatus includes a controller that causes an image recording device, upon detecting an error with a recording sheet according to information acquired by an error information acquisition device, to suspend image recording on the recording sheet with which the error has been detected, and on another recording sheet being transported on an upstream side in a transport direction, of the recording sheet with which the error has been detected, and to perform a predetermined protective ejection including protecting an ink jet head of the image recording device, by ejecting a limited minute amount of ink from the ink jet head, at least onto a recording sheet transported subsequent to the recording sheet the image recording on which has been suspended.

An ultrasonic apparatus includes a first ultrasonic sensor that transmits an ultrasonic wave to an object and receives the ultrasonic wave reflected by the object, a second ultrasonic sensor that transmits an ultrasonic wave to the object and receives the ultrasonic wave reflected by the object, an determination circuit that outputs an error signal when the difference between a first distance between the first ultrasonic sensor and the object calculated based on ultrasonic wave transmission and reception processing using the first ultrasonic sensor and a second distance between the second ultrasonic sensor and the object calculated based on ultrasonic wave transmission and reception processing using the second ultrasonic sensor is equal to or greater than a threshold value.

A printer carriage comprises a sensor to be actuated when an actuation member coupled to the sensor contacts a raised portion in a printing target. A vertical position of the actuation member may be adjusted with respect to the printer carriage.