ENCAD 215319-1 User Manual page 84

Color problems or shadowing
Calibrate cartridges.
Excessive graininess
Perform color deadband compensation. Refer to the Quick Start Guide.
Ghosting
The temperature of the print cartridge affects the size of the dots it prints. When the
cartridge is warmer it produces slightly larger dots than when it is cool. Several things
affect the temperature of the cartridge including the ambient temperature, the number of
dots that have recently been printed and the cartridge heater circuit. This change in
temperature and subsequent spot size causes what is referred to as "ghosting" or "para-
sitic suppression". Ghosting can occur when printing unidirectional if their is an area in
the image in which the cartridge is not firing (i.e. a white box within a filled area). Since
the cartridge cooled down while it wasn't printing, a light area can appear adjacent to the
non-printed area. This light area is "ghosting". By using the cartridge heaters to warm
the cartridge in these non-printed areas, the change in temperature and therefore "ghost-
ing" is minimized. Refer to the figure below which illustrates cartridge heat vs. spot size.
STEPS TO MINIMIZE GHOSTING (PARASITIC SUPPRESSION)
1. Use the preheat function and set the heat to 4 on all the cartridges.
- On the Main Menu, press Setup Menu/Ink Options Menu/Ink Preheat
Menu. In the Ink Preheat menu you will see Cyan - Preheat, Yellow -
Preheat, Magenta - Preheat, and Black Preheat.
Go into first preheat function and adjust the value to 4 and press OK.
Continue this with the three remaining preheat functions.
2. Slow the carriage speed down to 5 or lower.
On the Main Menu, press Setup Menu/Print Mode Menu/Carriage Speed. In
the Carriage Speed menu, adjust the value to 5 or less and press OK. If you
are printing using software to control the printer, you need to make these
adjustments in the software.
3. Put the printer in a bi-directional mode.
On the Main Menu, press Setup Menu/Print Mode Menu/Print Direction. In
the Print Direction menu, adjust the value to BI and press OK. If you are
printing using software to control the printer, make these adjustments in the
software.
CADJET ® 3D User Guide
Troubleshooting F-10