A system (93) monitors the break-up phase of an electrostatic deflection continuous ink jet printer to identify phase instability likely to be caused by a partial blockage of the jet-forming device (17). It ignores alternations between adjacent phase positions and brief unrepeated periods of phase disruption. Preferably it ignores phase changes caused by changes in other operational parameters of the printer, such as variations in ink pressure. Monitoring may be done in the printer (99) or in an external system (93), (95).

A system (93) monitors the break-up phase of an electrostatic deflection continuous ink jet printer to identify phase instability likely to be caused by a partial blockage of the jet-forming device (17). It ignores alternations between adjacent phase positions and brief unrepeated periods of phase disruption. Preferably it ignores phase changes caused by changes in other operational parameters of the printer, such as variations in ink pressure. Monitoring may be done in the printer (99) or in an external system (93), (95).

An untethered, arbitrary-surface printing device includes a housing, a print head, positioning means, locomotive means, and sensors configured to perform multi-pass high-precision printing (i.e. at least 300 dots per inch) on nearly any surface texture.

An untethered, arbitrary-surface printing device includes a housing, a print head, positioning means, locomotive means, and sensors configured to perform multi-pass high-precision printing (i.e. at least 300 dots per inch) on nearly any surface texture.

The present disclosure provides substrate processing apparatus and a substrate processing method for composing nozzles having different drop sizes into one or more pack units and performing pixel printing by using nozzles belonging to the thus composed packs. The substrate processing method includes extracting nozzles that have different drop sizes as different sized dropping nozzles, composing extracted nozzles into one or more packs, and performing pixel printing on the substrate with nozzles included in the pack by discharging a substrate treatment solution to a common target location on the substrate.

The present disclosure provides substrate processing apparatus and a substrate processing method for composing nozzles having different drop sizes into one or more pack units and performing pixel printing by using nozzles belonging to the thus composed packs. The substrate processing method includes extracting nozzles that have different drop sizes as different sized dropping nozzles, composing extracted nozzles into one or more packs, and performing pixel printing on the substrate with nozzles included in the pack by discharging a substrate treatment solution to a common target location on the substrate.

A system to direct print onto print substrates has a print head, at least one optical image sensor arranged adjacent a print substrate, wherein the print substrate will move in a process direction past the print head, at least one telecentric lens arranged between the print substrate and the at least one optical image sensor, and control circuitry electrically connected to the optical at least one image sensor and the print head, the control circuitry to generate dot clocks to cause the print head to print onto the substrate based upon data from the at least one optical image sensor identifying a position of the print substrate.

A system to direct print onto print substrates has a print head, at least one optical image sensor arranged adjacent a print substrate, wherein the print substrate will move in a process direction past the print head, at least one telecentric lens arranged between the print substrate and the at least one optical image sensor, and control circuitry electrically connected to the optical at least one image sensor and the print head, the control circuitry to generate dot clocks to cause the print head to print onto the substrate based upon data from the at least one optical image sensor identifying a position of the print substrate.

In some examples, a controller is to receive sensor data from a sensor associated with a fluid delivery system that delivers fluid from a fluid reservoir to a fluid conduit, determine, based on the sensor data, presence or integrity of a gas purger that is to be fluidically coupled to the fluid conduit, and issue an alert to indicate a gas purger anomaly condition based on the determining.

A distance measuring device includes: an imaging unit that captures a test pattern image including a pair of first markers and a second marker that is formed under a condition different from a condition applied to the first markers; a position detecting unit that detects a position of each of the pair of first markers and the second marker in a captured image captured by the imaging unit; a ratio calculating unit that calculates a ratio of a distance between the pair of the first markers in the captured image and an actual distance between the pair of the first markers; and an actual distance calculating unit that calculates an actual distance between one of the first markers as the pair and the second marker by multiplying a distance between the one of the first markers as the pair and the second marker in the captured image by the ratio.