ENCAD T-200, Service Manual

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ENCAD T-200 and T-200+ Service Manual
Maintenance 3-16
6. Wiping during a print can sometimes cause a band of lighter
density color in the image. Auto wipe may need to be
temporarily turned off to prevent banding.
7. Operator intervention. If someone lifts up the media on the take-
up side of the printer while it is printing, it can cause
momentary banding in the print. Lifting up the media while
printing changes the inkjet head-to-media distance and will
effect the printed dot size and placement of the ink droplets.
8. Cartridge failures can cause banding — electrical cartridge
failures and partial clogging of the inkjets can produce banding.
With Inkjet Detection and Compensation technology, electrical
cartridge failures and clogging can be corrected for up to 20
failures per cartridge with minimal degradation of the output.
9. Media width variations causing the media to drag on the media
guides can cause banding. Check the edges of the media for
evidence of media drag and edge anomalies.
10. Lower quality dithering. Select the highest quality dithering
pattern in the printer driver. i.e. stochastic dithering.
11. Deadband and cartridge calibrations. If the deadband calibration
is off, or the cartridge calibration is off, it can effect banding.
Also, if one color seems to be causing the banding — shifting the
color calibration of that color +/-1 unit may help.
12. Inkjet sputter. If the cartridge heater is set too high, inkjet
sputter may occur causing intermittent white spots throughout
the print.
13. Improper grounding or earthing. An improper A/C outlet power
ground may cause banding due to excessive noise on the line
between the neutral and ground. Ensure the outlet has a clean
zero ground potential with minimal noise between the neutral
and ground.