Abstract: Example implementations relate to progressive buffer generation. Some examples may include a drive system to advance print media through a print zone at a printing speed and a buffer speed calculation system to calculate a buffer generation speed based on the printing speed, a length of a plot to be printed, a minimum buffer, a buffer start position and an amount of time required to cut the print media. Some examples may also include a buffer generation system to generate a buffer between the buffer generation system and the drive system. In some examples, the buffer may be generated by advancing the print media at the buffer generation speed to accumulate a portion of the print media between the drive system and the buffer generation system.

Abstract: A method of determining calibration values for a media advance system of a page wide array printing device is described. A test pattern is printed on a calibration medium which advances along a media axis through the printing device. The test pattern comprises a plurality of test marks. The test pattern is scanned along a scan axis using a sensor and the calibration medium is advanced along the media axis through the printing device. The dimensions of the scanned test marks are analyzed, and calibration values are determined from the analyzed dimensions of the test marks. The scan axis is orthogonal to the media axis.

Abstract: A method and a print apparatus are described. The method and the print apparatus allow for selecting from a plurality of print modes a print mode for a whole page of a document to be printed dependent on a print material coverage of the whole page of the document to be printed.