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Print process
[11] Nozzle receives an electric signal (A) and ejects an ink drop (B)
Drop size modulation
The VarioPrint i-series printhead nozzles can produce drops of five different sizes. This
mechanism is called drop size modulation. The largest drop size is only used to compensate for a
failure of an adjacent nozzle. (
[12] Five different drop sizes
Media characteristics such as surface roughness and the type of coating determine how a ink
drop behaves when it touches the media. The media definition has parameters that determine
which drop sizes the print engine must apply while printing these media.
A
[13] Drop size modulation: the printer adjusts the drop size depending on the media characteristics. Media with
coating (top) allow for a larger drop size than media without coating (bottom)
Background spitting
Background spitting is the production of small ink drops during printing. These ink dots on the
media sheets are not a part of the source image but are jetted the background of the image. They
are not visible to the human eye. Background spitting keeps the nozzles open and clean.
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Chapter 2 - Explore the printer
B
A
Learn about quality control sheets on page
B
C
251)
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