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10.5 Images and Data
This screen allows the configuration of the data mode for the printer.
In Sequential mode, the printer takes data records one at a time and uses the data
for each subsequent print record. For example, the first image for all pens uses data
from the first available record, the second image the second set of data and so on. The
renderer buffers up to 32 images when printing is started. This allows different images to
be printed simultaneously on large arrays of print heads.
In Single Buffer mode, only one data record is held in memory at a time and is
used the next time an edge is detected. If there is no data in the buffer when an edge is
detected, nothing will be printed for any images that have data on the next print. This
mode is also useful for keeping timestamps current when printing is frequently paused
(the printer is not stopped but target items stop triggering, for example when a line is
stopped). Since the image is not rendered until an edge is detected, the time stamps will
also be current when an image is printed. Depending on the complexity of the image and
speed of the transport, there is a minimum distance required between the edge sensor
and the first pen in this mode. Typically 5" (12 cm) is sufficient, but it may be more or
less depending on the above mentioned variables.
In Repeat mode, each data record is repeated the specified number of times
before moving to the next data record.
Render on Demand mode causes images to be rendered only upon sensor edge
detection. This mode is automatically enabled when Single Buffer mode is selected.
Render on Demand allows the data buffer to be empty except when the trigger for the
next image is received. At least one record must be in the data buffer or a buffer
underflow message will be logged and the printer stopped.
For
information