hp-support-head-portlet

Actions
Loading...

Welcome to HP Customer Support

hp-contact-secondary-navigation-portlet

Actions
Loading...

hp-share-print-widget-portlet

Actions
Loading...

hp-concentra-wrapper-portlet

Actions
Loading...

HP Scitex LX850 and LX820 Printer Series - Create a new substrate preset

Whenever you load a new substrate type into your printer, you must choose a substrate preset for it.
  1. If possible, select a preset for the specific substrate type that you intend to load.
  2. If no specific preset is available, select a generic preset that corresponds to the specific type that you intend to load. You may be able to get better results by creating a specific preset for your substrate type.
  3. If no specific nor generic preset matches your substrate, select whatever preset seems to resemble it most closely. You will probably get better results by creating a specific preset for your substrate type.
Creating a new preset has several purposes.
  • You can assign a name of your own choice to a particular substrate.
  • You can adjust the preset to suit the precise characteristics of your substrate.
  • You can adjust the preset to your intended use of the substrate, which may range from highest-quality printing to fast production output.
  note:
You can change only the presets that you have created yourself. The presets supplied by HP cannot be changed.
Before creating a new preset, it is useful to understand a little about how the printer works. Here are some of the available settings.
Substrate preset settings
Setting
If too low
If too high
Number of passes
The number of passes specifies how many times the printheads will print over the same area of substrate.
The printer cannot deposit enough ink over a given area, so colors are muted. Because larger substrate advances are required and ink has to be placed faster on the substrate, the boundaries between passes are more visible and may be seen as horizontal lines across the image. However, printing speed is relatively high.
Colors are vivid, print quality is high, and printhead health is well maintained. However, printing speed is relatively low.
Curing temperature
Curing is needed to coalesce the latex, creating a polymeric film which acts as a protective layer, while at the same time removing the remaining co-solvents from the print. Curing is vital to ensure the durability of the printed images.
The print may emerge not fully dry, so that the ink smears when rubbed with a finger. The print may appear dry immediately after printing and then become wet to touch some seconds later. If the curing temperature is very low, the latex film is not created, in which durability is drastically reduced.
The substrate may wrinkle on the platen, causing vertical banding or ink smears, with substrate jams in extreme cases. Fragile substrates may be damaged.
Drying temperature
The heat applied in the printing zone removes water and fixes the image to the substrate.
Print quality defects such as bleeding and coalescence may occur. Boundaries between colors are not well defined. Single-color area fills are not uniform: ink is concentrated at the edges or in clusters within the area fill.
Thermal marks may be seen on the substrate; they may appear as vertical bands in some colors. The substrate may wrinkle on the platen, causing vertical banding or ink smears, with substrate jams in extreme cases.
Substrate tension
Tension is applied at the input and the output side. It needs to be evenly distributed along the whole width of the substrate, thus substrate load is a critical operation.
  note:
Input tension should be higher than output tension.
  note:
Output tension should be increased whenever vacuum pressure is increased.
The substrate may be poorly wound onto the output roll, with sagging and skew, in which case it is likely to become increasingly wrinkled in the printing zone. Also, substrate advance could be irregular, resulting in horizontal bands.
The substrate may be permanently deformed or damaged.
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.
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.
  2. Choose a name for your substrate.
      note:
    To avoid confusing other users, it is a good idea to use the substrate's commercial name.
      note:
    If you plan to use more than one ink density with this substrate, or more than one number of print passes, include the ink density and/or number of passes in the name.
  3. Select the parent substrate. Show details can help you to choose one that's similar to the new substrate. If you choose a generic substrate, select the ink density according to the expected behaviour and applications for your substrate.
      note:
    Use 100% ink density for substrates such as PVC Scrim Banner Frontlit, Green Banner, Vinyl-Calendared, Vinyl-Cast, Blue back and Scrim banner.
      note:
    Use 150 or 250% ink density for substrates such as PVC Scrim Banner Backlit, Perforated Vinyl, Polyester Film, Polyester Fabric, Canvas Polyester and Tyvek.
  4. You can now press the Create button to create a new entry in the substrates list, in the Custom substrates category, with all its characteristics inherited from the parent substrate. Press Finish if you do not plan to modify any substrate setting for now.
Consider how you plan to use your new substrate. If you require high-quality printing, you will need more passes; if you require fast printing, you will need fewer passes. Make a list of the print modes you are most likely to use.
Fine-tune the settings in your new preset
In the Settings pane you can modify various settings used in the printing process.
  note:
The changes in the Settings pane apply only to the highlighted print mode, so you must adjust each print mode independently. Any setting you have changed is indicated by an asterisk (*).
  1. Select the number of print passes that you want to use. Color calibration uses six passes with 100% ink density, eight passes with 150% ink density, or fourteen passes with 250% ink density. You are recommended to create a preset suitable for color calibration; for normal printing, you may want to create other presets with different numbers of passes.
    The recommended print modes for normal printing are as follows.
    Maximum ink density
    Print quality
    Passes
    250%
    High quality plus
    18
    High quality
    14
    Production plus
    10
    150%
    High quality plus
    10
    High quality
    8
    Production plus
    6
    100%
    High quality plus
    8
    High quality
    6
    Production plus
    5
    85%
    Production
    4
    70%
    Billboard plus
    3
    Billboard
    2
    50%
    Draft
    1
  2. Press the Print test button with the printer adjustments inherited from the parent substrate. Look for any potential problems during printing, such as:
    • Potential head crashes or ink smears between the carriage and the substrate. Cancel the job and/or turn off the printer if necessary to avoid damaging the printheads or any other sensitive printer components.
    • Potential substrate deformation and/or wrinkles caused by too much heat.
      note:
    In order to see better what is happening in the printing area, stand behind the printer, and look towards the print platen through the pinch wheels: you will find it easy to see wrinkles, risk of ink smearing or substrate deformation.
  3. Wait five minutes after the last part of the sample emerges from the printer.
  4. Evaluate the sample, directly from the output area:
    • Brush your fingertip over the full squares in the upper part of the sample to check that the ink is dry and firmly bonded to the substrate.
    • Look for coalescence problems in the middle part of the sample.
    • Look for ink bleeding problems in the lower part of the sample.
You are recommended to check the sample for problems and make adjustments to the settings in the following sequence. After making any adjustment, reprint the sample to see the current situation.
  1. If an alert tells you that the substrate advance cannot be tracked automatically with the current substrate, select Substrate > Settings and set the Automatic tracking (OMAS) field to Off. You will need to adjust the substrate advance manually.
      note:
    This alert may appear if the substrate-advance sensor is dirty.
  2. If you experience printhead crashes, ink smears, substrate deformation, wrinkles or cockle, try these adjustments in this order:
    1. Check that the substrate is correctly loaded.
    2. LX850 only: If there are wrinkles on self-adhesive vinyl substrates, install the Output Diverter Roller.
    3. Decrease the curing and drying temperatures. Use the following table as a guide.
      Curing (°C)
      80
      80
      85
      85
      90
      90
      95
      95
      100
      100
      Drying (°C)
      55
      60
      55
      60
      55
      60
      55
      60
      55
      60
    4. Increase the Vacuumand/or the Tension settings.
      If you increase the vacuum pressure, also increase the tension. The input tension should be the output tension + 15 N/m.
      1. Try increasing the Vacuum setting by 10 mmH20.
      2. Try increasing the Tension settings by 10 N/m.
      3. Try increasing the Tension settings by another 10 N/m.
      4. Try increasing the Vacuum setting by another 5 mmH20.
    5. Set the carriage beam to its highest position.
  3. If the sample is damp or easily scratched, try these adjustments in this order:
    1. Check that the ambient temperature is within the optimal range.
    2. Increase the curing and drying temperatures, unless you have already decreased them in a previous step. Use the following table as a guide.
      Curing (°C)
      80
      80
      85
      85
      90
      90
      95
      95
      100
      100
      Drying (°C)
      55
      60
      55
      60
      55
      60
      55
      60
      55
      60
    3. Decrease the airflow in increments of 20%. If the edges of the substrate are still not fully cured, turn off the curing fans using the switch at the side of the fans.
    4. If your current ink density is 150% or above, decrease airflow in steps of 20%.
    5. If all test sample blocks are damp in the 100% to 80% columns, adjust the total ink limit in the RIP, or use the ink restrictions in the Color pane.
    6. If any test sample block is damp in the 70% to 10% columns, increase the number of passes.
    7. Decrease the ink density by adjusting the total ink limit in the RIP, or using the ink restrictions in the Color pane.
  4. If you see ink bleeding or coalescence, such as the coalescence shown below, try these adjustments in this order:
    1. Check that the ambient temperature is within the optimal range.
    2. Check that the curing temperature has not been wrongly set.
    3. If the curing fans were turned off at the switch by the side, turn them on now. If the airflow is not already at 100%, increase the airflow in increments of 20% and check the status of the curing after each increment.
    4. Increase the drying temperature in steps of 5 degrees, unless you have already decreased it in a previous step.
    5. If your current ink density is 100%, increase airflow in steps of 20%.
    6. Increase the number of passes.
    7. Decrease the ink density by adjusting the total ink limit in the RIP, or using the ink restrictions in the Color pane.
  5. If you see vertical banding, try these adjustments in this order:
    1. Decrease the Vacuum setting in steps of 5 mmH20, unless you have already increased it in a previous step.
    2. Decrease the drying temperature, unless you have already increased it in a previous step.
    3. Decrease airflow in steps of 20%, unless you have already decreased it in a previous step.
  6. If you see horizontal banding, check the substrate advance pattern in the test sample (the fine horizontal lines).
    • If you see magenta above the black lines, press the Print adjustment button in the Create Substrate window and increase the substrate-advance setting.
    • If you see magenta below the black lines, press the Print adjustment button in the Create Substrate window and decrease the substrate-advance setting.
    • If the lines are simply black, proceed to the next step.
  7. If you see irregular horizontal banding, try these adjustments in this order:
    1. Decrease the Vacuum setting in steps of 5 mmH20, unless you have already increased it in a previous step.
    2. Adjust substrate tension according to the following recommendations:
      • The input tension should be the output tension + 15 N/m.
      • First increase tensions by 20 N/m. If results are unsatisfactory, decrease tensions in steps of 10 N/m.
    3. Increase the number of passes.
  8. If colors are misaligned, try realigning the printheads manually.
When you have adjusted the settings for one print mode, you can proceed to other print modes. However, it's not necessary to deal with them all at once: you can edit the substrate preset at any time by selecting Substrate > Edit in the HP Internal Print Server.
  note:
Note the settings that you used with the first print mode. You can probably use the same settings for other modes.
There is also a possibility to change the different settings while printing (in case the substrate preset selected is a custom one). This can be done while printing, click the Print Adjustment button, and then the different settings can be fine-tuned. Note that some changes might take some time to have an impact (for example: increases or decreases in temperature).
Adjust the printing workflow for optimum color performance
  1. Check your substrate's color calibration status and calibrate it if recommended, by selecting Substrate > Color calibration in the HP Internal Print Server. See the 'Printer calibration' chapter in the Maintenance and troubleshooting guide for more information.
  2. Create ICC profiles for your substrate; see your RIP documentation for instructions. Normally, the procedure includes setting the total ink limit as well as creating the profiles. When setting the total ink limit in the RIP, bear in mind the basic problems to be avoided: ink bleeding and coalescence, and damp prints caused by incomplete curing.
Export your new preset and profiles
Your substrate has been fully characterized from both the printer and the RIP points of view: a substrate preset is present in the printer, and one or more ICC profiles are present in the computer hosting your RIP. To export the ICC profiles, see your RIP documentation. To export your substrate preset, go to the HP Internal Print Server and follow these steps:
  1. Select Substrate preset management.
  2. Select the Export tab. A file with the extension oms will be saved, which can be imported by another printer.
To import your substrate preset into another printer:
  1. Select Substrate preset management.
  2. Select the Import tab, then select the correct file with the extension oms.

hp-feedback-input-portlet

Actions
Loading...

hp-online-communities-portlet

Actions
Loading...

Ask the community!


Support Forum

Support Forum

Join the conversation! Find Solutions, ask questions, and share advice with other HP product owners. Visit now


hp-feedback-banner-portlet

Actions
Loading...

hp-country-locator-portlet

Actions
Loading...
Country: Flag Thailand

hp-detect-load-my-device-portlet

Actions
Loading...