Memory Usage
It is difficult to calculate the amount of Printer memory needed to plot a drawing of any given file size Memory is used not just to hold the input data but also for system overhead processing work/space and storage of the internal representation of the plot Some types of graphics require relatively large amounts of memory Examples are wide lines raster fill patterns polygons and user/defined lines
lot Orienttion
The output orientation of the drawing also has an impact on memory usage Compare a plot of horizontal lines with one of vertical lines Lines plotted parallel to the carriage axis take up considerably less memory than those plotted perpendicular to it The Printer builds graphic display objects on a swath/by/swath basis A horizontal line can be contained in one swath A vertical line spans many swaths and therefore requires more entries in the Printers internal display list
ster Imge rocessor
The raster transfer language RTL provides a solution to insufficient memory on the Printer When all the data is sent to the Printer in the order left/to/right and top/to/bottom the Printer is able to plot the data as it receives it For this to happen software a raster/image processor in the computer must first rasterize all the data The software issues a command referred to in RTL as no negtie motion telling the Printer that it will not receive data for any media location on which it has already plotted
The use of no negative motion is called flow moe Data flows through the Printer without being stored in a display list so the size of the file that you can send is almost unlimited
Functional Overview | HP DesignJet 430, 450C and 455CA Printers |