HP Latex 260 Maintenance and troubleshooting guide - Page 65

Lack of sharpness, Black areas look hazy, Ink smears, Subtle stains or uneven appearance

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Lack of sharpness If text, lines or solid areas are rough or blurred, the printheads may be misaligned. This is likely if you have not aligned the printheads for a long time, or if there has been a substrate jam. Align the printheads if necessary (see Align the printheads on page 11). You can check whether it is necessary by using the printhead status plot (see Use the printhead status plot on page 53). Black areas look hazy If black areas look hazy or not sufficiently black, try these suggestions. ● Increase the number of passes. ● Laminate the print. ● See Color reproduction tricks on page 52. Ink smears Ink smears may be seen on the print for the following reasons. ● The substrate is skewed. Do not ignore the warning message that appears during the loading process if there is significant skew. ● The substrate is not flat in the print zone. Try the following possible solutions. ◦ Increase the vacuum level in steps of 10 mmH2O. Do not exceed the following limits: 20 mmH2O for banners, 35 mmH2O for vinyl, and 50 mmH2O for other substrate families. ◦ Reduce the curing temperature. You will probably need to increase the number of passes in order to achieve adequate curing. ◦ Check whether there are fibers on the printheads. If the problem appears only at the beginning of the print, try the following suggestions. ● Disable the automatic cutter. ● Go to the front panel and select the icon, then Substrate handling options > Extra bottom margin. Set the margin to 100 mm. If that is not enough, try 150 or 200 mm. This extra margin will apply only to jobs that start printing when the printer is idle and when the cutter is disabled. ● Increase the vacuum level in steps of 10 mmH2O. Do not exceed the following limits: 20 mmH2O for banners, 35 mmH2O for vinyl, and 50 mmH2O for other substrate families. ● Decrease the warm-up drying temperature in steps of 5°C. ● Decrease the warm-up curing temperature in steps of 5°C. ● Increase the number of passes. ● Make sure that the substrate is stored in the same room in which the printer is located. Subtle stains or uneven appearance Subtle color differences may be seen on some substrates if they are stored partially covered after printing. In the period immediately after printing, such substrates should be stored either totally covered or totally uncovered. It may be advisable to avoid the prolonged contact of two printed faces. This problem tends to disappear if the substrate is left uncovered for some time. ENWW Lack of sharpness 59

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Lack of sharpness
If text, lines or solid areas are rough or blurred, the printheads may be misaligned. This is likely if you have
not aligned the printheads for a long time, or if there has been a substrate jam. Align the printheads if
necessary (see
Align the printheads
on page
11
). You can check whether it is necessary by using the
printhead status plot (see
Use the printhead status plot
on page
53
).
Black areas look hazy
If black areas look hazy or not sufficiently black, try these suggestions.
●
Increase the number of passes.
●
Laminate the print.
●
See
Color reproduction tricks
on page
52
.
Ink smears
Ink smears may be seen on the print for the following reasons.
●
The substrate is skewed. Do not ignore the warning message that appears during the loading process if
there is significant skew.
●
The substrate is not flat in the print zone. Try the following possible solutions.
◦
Increase the vacuum level in steps of 10 mmH
2
O. Do not exceed the following limits: 20 mmH
2
O
for banners, 35 mmH
2
O for vinyl, and 50 mmH
2
O for other substrate families.
◦
Reduce the curing temperature. You will probably need to increase the number of passes in order
to achieve adequate curing.
◦
Check whether there are fibers on the printheads.
If the problem appears only at the beginning of the print, try the following suggestions.
●
Disable the automatic cutter.
●
Go to the front panel and select the
icon, then
Substrate handling options
>
Extra bottom margin
.
Set the margin to 100 mm. If that is not enough, try 150 or 200 mm. This extra margin will apply only to
jobs that start printing when the printer is idle and when the cutter is disabled.
●
Increase the vacuum level in steps of 10 mmH
2
O. Do not exceed the following limits: 20 mmH
2
O for
banners, 35 mmH
2
O for vinyl, and 50 mmH
2
O for other substrate families.
●
Decrease the warm-up drying temperature in steps of 5
°
C.
●
Decrease the warm-up curing temperature in steps of 5
°
C.
●
Increase the number of passes.
●
Make sure that the substrate is stored in the same room in which the printer is located.
Subtle stains or uneven appearance
Subtle color differences may be seen on some substrates if they are stored partially covered after printing. In
the period immediately after printing, such substrates should be stored either totally covered or totally
uncovered. It may be advisable to avoid the prolonged contact of two printed faces. This problem tends to
disappear if the substrate is left uncovered for some time.
ENWW
Lack of sharpness
59