iSys V8.5e Thermal Printer User Manual

Page 24

Advertising

The contrast function adjusts the density of the output. Settings range from C 1 to C 8. Settings are relative

values: C 1 is the lightest, C 4 is normal, C 8 the darkest.

After performing a test plot or plot job, determine if the contrast is acceptable. If the output is extremely dark,

very faint, or irregular, first check that the media setting is correct (see “Media” section of this chapter).

If the contrast needs further adjusting, change the contrast setting by starting at the lowest value, adjust the

contrast upwards one value at a time, testing after each adjustment. This is particularly important when using

lightweight papers or papers with unknown specifications.

CAUTION:

Thermal plotting technology involves high temperatures. Incorrect media or contrast settings can

damage the printhead or other components and void the warranty. Media damage can also occur.

VORSICHT:

Bei der thermischen Plottertechnologie entstehen hohe Temperaturen. Ungeeignete Medien oder

falsche Kontrasteinstellungen können den Druckkopf oder andere Bauteile beschädigen und zu Verlust der Garantie

führen. Auch können

Beschädigungen an den Medien entstehen.

Speed

The speed function adjusts the speed of the plot output. There are four output plot speed settings in the V8.5e:

1.0, 2.0, 3.0, and 4.0 inches per second. The default setting is 1.0 inch per second which produces the highest

quality output.

If the plot speed is erratic, or if output quality is unacceptable, lowering the plot speed will result in an improved

plot quality. Such problems may arise when data enters the plotter at a slower rate than the plot speed setting.

Lowering the output plotting speed enables the plotter to match a lower input data rate and produces a smoother

output plot.

When the media setting is film (LF or HF), the plotter speed defaults to 1 inch per second. When Grayscale mode

is enabled, plot speed is dependent upon the level of grayscale selected.

Media

The media function adjusts the time that the printhead is turned on (strobe time) to create an image on the media

based upon the media type selected. The default setting is light paper. When the plotter is set to film or
grayscale mode the printhead’s requirement for strobe times is raised. This requires a slower plot speed in order to

maintain the high quality level of the V8.5e.

Note: there are two preprogrammed media tables for grayscale plotting. These calibration tables can be changed

for different medias by uploading new tables which can be provided by The Imaging Systems Group Inc. for

virtually any approved thermal media. These tables are custom tuned to provide maximum grayscale performance
on a selected media. These tables can be uploaded to the V8.5e, where they are stored in non-volatile memory

until overwritten. Tables are uploaded two at a time overwriting the factory default tables stored in T1 and T2.