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Maintaining Print Quality |
In the Diagnostic Stripe all the 'A' nozzles are fired first, then the 'B' nozzles and finally
the 'C' nozzles. Each nozzle is fired 16 times. Refer to Figure 17 above.
The following are a series of examples of problems illustrated by the Diagnosis Stripe:
Figure 18 shows that one of the 'C' nozzles in the front black head has poor
directionality. This will be seen as slight overspray in the image. This is caused by dry
ink or another contaminant in or around the nozzle. An individual nozzle dropout has
little effect on image quality.
Figure 18 One Nozzle Not Firing Properly
Figure 19 shows that 5 adjacent black nozzles are not firing at all. This will introduce
banding in an image. This is caused by dry ink or another contaminant in or around the
nozzle.
This is fixed by cleaning the head with a swab and UV Flush, then performing a High
Purge on the individual color. If necessary, follow this by swabbing the affected head and
finally by syringing the affected head until the 'curtain' of UV Flush exiting the head is
continuous – no gaps or spray in the wrong direction.
Figure 19 Five Adjacent Nozzles Not Firing
6/2/04
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Troubleshooting
