Compensating platen defects based on printhead-to-platen spacing
AssigneeHewlett-Packard Development Company, L.P.
InventorsFrederic Barnel, David Toussaint
Life of this patent
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Abstract
In one example, an apparatus is described, which includes a platen locating the print medium, at least one printhead for marking on the print medium, a carriage holding the at least one printhead, a sensor at least partially mounted to the carriage to measure a printhead-to-platen spacing (PPS) along scanning axis during scanning, and an integrated circuit including a dynamic compensation module and a PPS analysis module to delay firing of printing fluid drops from the at least one printhead to compensate platen defects based on the measured PPS.
Claims15
An apparatus, comprising:
- a platen for supporting a print medium;
- a carriage;
- a sensor at least partially mounted to the carriage, wherein the sensor measures a printhead-to-platen spacing (PPS) along scanning axis during scanning;
- and
- an integrated circuit comprising a dynamic compensation module and a PPS analysis module to delay firing of printing fluid drops from at least one printhead to compensate platen defects based on the measured PPS.
A method comprising:
- loading a print medium on to a platen in a printing apparatus;
- measuring a printhead-to-platen spacing (PPS) along scanning axis by a sensor at least partially mounted to a carriage by initiating the carriage movement along the scanning axis;
- and
- automatically delaying firing of printing fluid drops from at least one printhead to compensate platen defects based on the measured PPS.
A non-transitory computer readable storage medium comprising a set of instructions executable by a processor resource to:
- receive a printhead-to-platen spacing (PPS) from a sensor, wherein the PPS is measured along scanning axis by the sensor at least partially mounted to a carriage by initiating the carriage movement along the scanning axis;
- and
- delay firing of printing fluid drops from at least one printhead to compensate platen defects based on the measured PPS.
Dependencies are inferred from the claim text.