iSys V36 - Manual (Page 23)

Contrast
Changes the overall darkness of the plot. The default is 0 and changes up and
down to +4 and -4. 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 still needs adjusting, change the contrast setting by pressing the
up or down buttons in the CONTRAST sub-menu. Starting at the lowest
value, adjust the contrast 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.
Speed
The speed function adjusts the speed of the plot output. The default is 1/8”
per second. The speed limit for film media is 1/4” per second The maximum
speed for a given dpi setting is approximately 2” per second in 200 dpi mode
and 1 1/4” per second for 400 dpi mode. Change the speed by selecting the
speed option in the appropriate menu, and moving up or down the scale by
pressing the up and down arrows. Deselecting will save changes.
If the plot speed is erratic, or if output quality is unacceptable, lower the plot
speed. Such problems may arise when data enters the plotter at a slower rate
than the plotter is set for. This is most likely to occur on the MAX setting.
Lowering the plot speed enables the plotter to match the input rate of data and
produces a smoother, better quality output.
O P E R A T I O N