Method and printing system for depositing printing fluid on a sheet of corrugated media

1. A method of depositing printing fluid on a sheet of corrugated media with an array of nozzles, the method comprising:

determining a height displacement of the sheet at multiple locations on the sheet with respect to a reference height;

determining a gradient of the height displacements at multiple locations along the sheet:

adjusting control parameters for each of multiple nozzles, including at least one of:

increasing an angle of tilt of the nozzle at a location of a gradient that is more steep than another gradient;

increasing a spray angle of the nozzle at a location of a height displacement that is smaller than another height displacement;

increasing a spray angle of the nozzle at a location of a gradient that is less steep than another gradient;

increasing a spray flow intensity of the nozzle at a location of a height displacement that is smaller than another height displacement; and

increasing a spray flow intensity of the nozzle at a location of a gradient that is less steep than another gradient; and

depositing printing fluid from the plurality of nozzles onto the sheet of corrugated media according to the adjusted control parameters.

2. The method of claim 1 , wherein determining height displacements comprises:

measuring height displacements at multiple locations on the sheet; and

estimating a height displacement of at least one additional location on the sheet based on the measured height displacements.

3. The method of claim 2 , wherein estimating the height displacement of an additional location on the sheet is based on at least one of:

an extrapolation of the measured height displacements; and

an interpolation of the measured height displacements.

4. The method of claim 1 , wherein determining height displacements and gradients comprises:

capturing images of the sheet with multiple cameras; and

generating a three-dimensional model of the sheet based on the captured images.

5. The method of claim 1 , wherein the printing fluid is at least one of:

an ink;

a gloss; and

a varnish.

6. A printing system comprising:

an array of nozzles arranged to deposit printing fluid on a sheet of corrugated media;

multiple cameras to capture images of the sheet;

a print controller configured to:

generate a three-dimensional model of the sheet based on images from the cameras;

determine from the model a height displacement of the sheet at multiple locations on the sheet with respect to a reference height;

determine from the model a gradient of the height displacements at multiple locations along the sheet;

adjust control parameters for the array of nozzles based on one or both of the height displacements and the gradients; and

control the array of nozzles to deposit printing fluid onto the sheet of corrugated media based on the adjusted control parameters.

7. The printing system of claim 6 , wherein the print controller is configured to adjust control parameters for each of multiple nozzles, including at least one of:

increasing an angle of tilt of the nozzle at a location of a gradient that is more steep than another gradient;

increasing a spray angle of the nozzle at a location of a height displacement that is smaller than another height displacement;

increasing a spray angle of the nozzle at a location of a gradient that is less steep than another gradient;

increasing a spray flow intensity of the nozzle at a location of a height displacement that is smaller than another height displacement; and

increasing a spray flow intensity of the nozzle at a location of a gradient that is less steep than another gradient.

8. A non-transitory computer-readable storage medium storing instructions that, when executed by one or more processors, cause the one or more processors, in a printing system, to:

receive sensor data from a sensor device connected to, or integral with, the printing system;

use the sensor data to determine a height displacement of a sheet of corrugated media at multiple locations on the sheet with respect to a reference height and to determine a gradient of the height displacements at multiple locations along the sheet;

generate control data for multiple nozzles based on the determined height displacements and gradients;

adjust control parameters for the nozzles based on the control data, including at least one of:

increasing an angle of tilt of the nozzle at a location of a gradient that is more steep than another gradient;

increasing a spray angle of the nozzle at a location of a height displacement that is smaller than another height displacement;

increasing a spray angle of the nozzle at a location of a gradient that is less steep than another gradient;

increasing a spray flow intensity of the nozzle at a location of a height displacement that is smaller than another height displacement; and

increasing a spray flow intensity of the nozzle at a location of a gradient that is less steep than another gradient; and

deposit printing fluid from the nozzles onto the sheet of corrugated media according to the adjusted control parameters.

9. The medium of claim 8 , wherein the sensor data includes images from multiple cameras and the instructions to use the sensor data include instructions to use the images to generate a three-dimensional model of the sheet to determine the height displacements and the gradients.