HP Scitex LX850 HP Scitex LX850 & LX820 Printers: User's Guide - English - Page 69

Prepare the printer for a new substrate, Create and name the new preset, Substrate, Create

Get HP Scitex LX850 PDF manuals and user guides View all HP Scitex LX850 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 69 highlights

Table 3-1 Substrate preset settings (continued) Setting If too low If too high Airflow power The airflow generated by the fans in the curing module is split into two air layers, one reaching the print zone and the other at the end of the curing zone. This is needed to help remove the moisture and co-solvents while the substrate is being heated by the drying and curing modules. The printer will be less able to dry the ink. In certain printing conditions (fast print modes with fewer than 5 passes and ink densities below 150%), there could be print-quality defects such as bleeding and coalescence and/or incomplete drying of the prints. With certain substrates and printing conditions, an excessive airflow in the print zone could cause print-quality defects such as vertical banding. Also, with some substrates, too high an airflow could prevent the printer from reaching the drying and/or curing target temperatures, causing potential system power errors. Vacuum pressure The vacuum applied to the substrate in the printing zone helps to hold the substrate down on the print platen, keeping the distance to the printheads constant. The substrate can lift up off the platen and touch the printheads. This can smear the printed image, cause a substrate jam or even damage the printheads. Vertical bands can appear in some colors. Also, for sticky substrates, friction could be too high and substrate advance irregular, resulting in horizontal bands. Ink restrictions Some colors may be too pale. A way of specifying the maximum amount of each color of ink that can be laid down on the substrate. The print may suffer from coalescence, wrinkles and insufficient curing, depending on the substrate and the other settings. Carriage beam position The distance between the printing heads and the substrate is a critical determinant of print quality. It can be adjusted by modifying the height of the carriage beam above the platen. The substrate may touch the printheads. This can smear the printed image, cause a substrate jam or even damage the printheads. Print quality defects such as graininess, shadows and worm-shaped dark areas may occur. Handle the substrate Prepare the printer for a new substrate 1. Whenever possible, try to ensure that your printer is in an optimum state before you create a new preset: run any pending maintenance task, in particular printhead checks and alignment. 2. Stop the print queue and wait for the printer to finish the current job. No jobs should be sent to the printer until the new substrate preset is complete. 3. Load your new substrate. The process of loading a substrate into the printer has been designed to be completely independent of the substrate type. When loading, follow the correct procedure and ensure that the roll width is specified, either automatically by the printer or by yourself. You may not experience the best possible results if there are significant differences between the specified and the actual roll width. NOTE: You are recommended to use the roll-to-roll configuration when creating a new preset. 4. Choose a suitable carriage beam printing position: see Set the carriage beam position on page 25. Create and name the new preset To create a new preset, you must copy an existing preset, then rename and modify it. 1. Select Substrate > Create in the HP Internal Print Server. ENWW Create a new substrate preset 65

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
Table 3-1
Substrate preset settings (continued)
Setting
If too low
If too high
Airflow power
The airflow generated by the fans in the
curing module is split into two air layers,
one reaching the print zone and the
other at the end of the curing zone. This
is needed to help remove the moisture
and co-solvents while the substrate is
being heated by the drying and curing
modules.
The printer will be less able to dry the
ink. In certain printing conditions (fast
print modes with fewer than 5 passes
and ink densities below 150%), there
could be print-quality defects such as
bleeding and coalescence and/or
incomplete drying of the prints.
With certain substrates and printing
conditions, an excessive airflow in the
print zone could cause print-quality
defects such as vertical banding. Also,
with some substrates, too high an
airflow could prevent the printer from
reaching the drying and/or curing
target temperatures, causing potential
system power errors.
Vacuum pressure
The vacuum applied to the substrate in
the printing zone helps to hold the
substrate down on the print platen,
keeping the distance to the printheads
constant.
The substrate can lift up off the platen
and touch the printheads. This can
smear the printed image, cause a
substrate jam or even damage the
printheads.
Vertical bands can appear in some
colors. Also, for sticky substrates, friction
could be too high and substrate
advance irregular, resulting in horizontal
bands.
Ink restrictions
A way of specifying the maximum
amount of each color of ink that can be
laid down on the substrate.
Some colors may be too pale.
The print may suffer from coalescence,
wrinkles and insufficient curing,
depending on the substrate and the
other settings.
Carriage beam position
The distance between the printing heads
and the substrate is a critical
determinant of print quality. It can be
adjusted by modifying the height of the
carriage beam above the platen.
The substrate may touch the printheads.
This can smear the printed image, cause
a substrate jam or even damage the
printheads.
Print quality defects such as graininess,
shadows and worm-shaped dark areas
may occur.
Prepare the printer for a new substrate
1.
Whenever possible, try to ensure that your printer is in an optimum state before you create a new
preset: run any pending maintenance task, in particular printhead checks and alignment.
2.
Stop the print queue and wait for the printer to finish the current job. No jobs should be sent to the
printer until the new substrate preset is complete.
3.
Load your new substrate. The process of loading a substrate into the printer has been designed to
be completely independent of the substrate type. When loading, follow the correct procedure and
ensure that the roll width is specified, either automatically by the printer or by yourself. You may
not experience the best possible results if there are significant differences between the specified
and the actual roll width.
NOTE:
You are recommended to use the roll-to-roll configuration when creating a new preset.
4.
Choose a suitable carriage beam printing position: see
Set the carriage beam position
on page
25
.
Create and name the new preset
To create a new preset, you must copy an existing preset, then rename and modify it.
1.
Select
Substrate
>
Create
in the HP Internal Print Server.
ENWW
Create a new substrate preset
65
Handle the substrate