Print gap compensation

摘要

In an ink jet printer (2), where there is relative movement between a print carriage (4) and a print table (6) to print on to a substrate mounted on the table (6), the gradient of the print table at each position of the print carriage (4) is used to produce a compensated position of the print carriage (4), and printing data is sent to the print head according to the compensated position instead of the actual position. This delays or advances the release of ink, to compensate for the difference in the time taken for the ink to reach a substrate mounted on the print table (6) when the print gap between print heads and print table (6) is not constant.

主权项

1. A method of providing a working measure of the topography of a work surface comprising:
storing at least a first and second representations of the topography corresponding respectively to first and second conditions, wherein each condition has a plurality of associated parameters, and wherein the two-dimensional topography of the work surface changes between the first and second conditions; obtaining the value of at least one associated parameter, comprising obtaining the value of the at least one parameter corresponding to at least first and second regions of the work surface respectively, and interpolating between the regions; and providing the working measure based on the obtained value of the parameter and the stored representations of the topography.