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HP Designjet 9000s Printer Series - Recommened Dryer, Heater and Carriage Height Settings when Printing on HP Media

This document describes the recommended settings for the dryer, the heater, the carriage height and other areas of the printer when using HP media.
Define the printing side
Before loading a roll you need to know which side is the correct printing side. This issue generally only applies to banners, as they can be printed on both sides:
  • HP Universal Photo Realistic Paper - On the outside
  • HP Premium Self-adhesive Vinyl - On the outside
  • HP Premium Backlit - On the outside
  • HP Premium Scrim - On the inside, because on the outside face there are media marks/stripes, these are not manufacturing defects, but a guide to which side to print on.
  • HP Universal Scrim – Both sides.
    • The inner side is smoother and less glossy than the inner side.
    • The inner side can be used, but the reflection of light may affect the banner’s readability.
Double side printing capability
The printer has no double-sided printing functionality.
  • HP Premium Scrim - No.
    Although this media has a ‘blockout’ layer that ensures 100% opacity. The outside of the roll has manufacturing marks.
  • HP Universal Scrim - No.
    Media is not 100% opaque.
Heater temperature
The heater’s temperature setting is critical to achieving the best printing quality. Setting the temperature too low can cause poor ink adhesion, coalescence, ink bleeding and drying issues. Setting the temperature too high may cause the media to stick to the platen; this can also cause ‘cockle’, both of which can lead to head crashes, which can shorten the life of the printhead. The printer has three heaters.
  • Front - To heat the media in preparation for depositing of ink.
  • Print - To ensure ink adhesion while printing.
  • Rear - To help with the drying process and to control the drop size.
All these temperatures can be set via the RIP or via the heater’s front panel:
  • HP Universal Photo Realistic Paper - Rear heater temperature - 45° C (113° F) - Printer heater temperature - 38° C (100° F) - Front heater temperature - 30° C (86° F)
  • HP Premium Self-adhesive Vinyl - Rear heater temperature - 48° C (118° F) - Printer heater temperature - 48° C (118° F) - Front heater temperature - 44° C (111° F)
  • HP Premium Backlit - Rear heater temperature - 40° C (104° F) - Printer heater temperature - 37° C (99° F) - Front heater temperature - 32° C (90° F)
  • HP Premium Scrim - Rear heater temperature - 45° C (113° F) - Printer heater temperature - 45° C (113° F) - Front heater temperature - 40° C (104° F)
  • HP Universal Scrim - Rear heater temperature - 35° C (95° F) - Printer heater temperature - 45° C (113° F) - Front heater temperature - 45° C (113° F)
Carriage height
The carriage can be set at two different heights. The high position is useful when printing thick media or media that has poor expansion values. Low position has better drop control.
  • HP Universal Photo Realistic Paper - Low position.
  • HP Premium Self-adhesive Vinyl - Low position.
  • HP Premium Backlit - Low position.
  • HP Premium Scrim - High position.
  • HP Universal Scrim - High position.
Media profiles
The HP Designjet 9000s printer works with external RIPS. HP offers an endorsed (recommended) RIP that is manufactured by Onyx. In this RIP these profiles are included in the installation CD and are installed automatically. For the remaining RIP profiles, please visit their web site. Use the printmode which has the same name as the media itself, these are:
  • HP Universal Photo Realistic Paper printmode
  • HP Premium Self-adhesive Vinyl printmode
  • HP Premium Backlit printmode
  • HP Premium Scrim printmode
  • HP Universal Scrim printmode
Media advance setting
Apply the Advance Calibration to each media to avoid banding issues. The values of the media advance are specified in the RIP and have priority over those that are set via the front panel. Media advances on the HP RIP have been calibrated in the factory for each HP media; however, we strongly recommend that you perform an initial media advance calibration. Here are the media advance setting for the HP media:
  • HP Universal Photo Realistic Paper - 100,12%.
  • HP Premium Self-adhesive Vinyl - 100,31%
  • HP Premium Backlit - 100,13%.
  • HP Premium Scrim - 100,25%
  • HP Universal Scrim - 100,50%
Dry times
Allow media to dry before you handle samples. Respect the dry times to avoid image transfer, media sticking or simple ruining your work. The dry times may be differ depending on the environmental working conditions. All these dry times are measured at 23C/50RH:
  • HP Universal Photo Realistic Paper - 15min
  • HP Premium Self-adhesive Vinyl - 5min
  • HP Premium Backlit - Instant except for double density print modes: 1 hour plus.
  • HP Premium Scrim - 10 min
  • HP Universal Scrim - 5 min
Using the Dryer
The external HP dryer helps to reduce drying time by forcing a flow of hot air over the printed surface. Improvements in productivity can be significant.
  caution:
It is not recommend to use IR dryers because of their extremely high temperatures; they can damage the job as well as the printer.
  • HP Universal Photo Realistic Paper Using the dryer is recommended. Use instant dry with 75% flow and 75% temperature.
  • HP Premium Self-adhesive Vinyl The dryer is not required at normal environmental conditions. However, under low temperatures and high humidity conditions, the dryer may be needed. In this case use instant dry with 75% flow and 75% temperature.
  • HP Premium Backlit Not required when using single density printmodes. However the dryer is required when using double density printmodes. In this case use instant dry with 75% flow and 75% temp.
  • HP Premium Scrim The dryer is recommended when using high speed printmodes (2-4 pass). In this case use instant dry with 75% flow and 75% temperature.
  • HP Universal Scrim The dryer is not required at normal environmental conditions. However, under low temperatures and high humidity conditions, the dryer may be needed. In this case use instant dry with 75% flow and 75% temperature.
When to use the Take Up Reel (TUR)
The Take UP Reel (TUR) can be operated in two modes: ‘Tension’ and ‘Loose’ mode, the setting of the first mode is more critical for the dry time than the other. The TUR usage is only limited by the media drying time:
  • HP Universal Photo Realistic Paper - Yes, when used with the dryer.
  • HP Premium Self-adhesive Vinyl - Yes. Use with the dryer in low temperature and high humidity conditions.
  • HP Premium Backlit - Yes. Use with the dryer in low temperature and high humidity conditions and when used with double density printmodes.
  • HP Premium Scrim - Yes when used with the dryer.
  • HP Universal Scrim - Yes. Use with the dryer in low temperature and high humidity conditions.
Image Quality Issues
Banding:
  1. Perform the printhead maintenance (Cap and wiper cleaning).
  2. Perform a "normal" or "strong" printhead cleaning.
  3. Print the same job again using the same settings.
  4. If banding is still present, perform an advance calibration.
    note:
    If you are using the TUR in ‘Tension’ mode, the advance calibration values may be slightly different to the "normal" advance values. Perform an advance media calibration with the media on the TUR).
Coalescence and/or ink bleeding
Coalescence and ink bleeding issues appear when the temperature of the heater is too low. Increasing the heater temperature may solve these issues. If you increase the heater temperature too much it can cause media wrinkles that may cause head crashes and/or media to stick in the platen. Only use the recommended heater temperatures and don't modify them greater than a +/-10%.
Low ink adhesion and poor ink coverage
  • When using the HP Universal Photo Realistic Paper avoid using 2 pass printmodes as ink adhesion and coverage is very low.
  • When using HP Premium Backlit media avoid low pass printmodes due poor ink coverage. The recommended printmode is 720x720 dpi 8 pass printmode.
Head crashes
The root cause of head crashes is mainly because the temperature of the heater is set to high. In case of head crashes, the following steps may help.
  • HP Universal Photo Realistic Paper - Decrease the temperature setting of the heater.
  • HP Premium Self-adhesive Vinyl
    1. Decrease the temperature setting of the heater.
    2. Use the TUR in tension mode.
  • HP Premium Scrim and HP Universal Scrim
    1. Set the position of the carriage to the highest position.
    2. Decrease the temperature setting of the heater.
    3. Use the TUR in tension mode.
Media sticks to the platen
When using HP Premium Scrim or HP Universal Scrim, the media can stick to the platen when the heater is set too high; this can cause wrinkles and head crashes. The solution to this is to reduce the temperature setting of the heater.
Printed media sticks to media backside when using the TUR
The media sticks to the together because the ink is still wet, this can be solved by using the TUR in loose mode and by using the HP external dryer.