To display IS screen systems on a Prinergy system, you must first select Screening > Display all IS Screens under Configure System in Administrator on the primary Server. On a Prinergy Evo 4.0 system, you must add the line Jasper.SGEN.SGEN_FilterScreen=0 to \config_data\System\common\config.txt and restart your Printer JTPs (or all of Evo).
When IS screening is enabled on a Prinergy system, 36 screen instances are loaded by default. These screen instances all have the prefix KODAK_TF. These screens have been created for use with flexo imaging on Kodak ThermoFlex output devices. A typical screen might be named Kodak_TF48M135r100R. The first two numbers after the TF refer to the number of imaging beams on the device, and the letter M or N refers to whether the device is a Narrow or a Mid. The next number refers to screen frequency in lines per inch (lpi), and the final number refers to resolution (R) in dots per millimeter. 94 lines per mm equates to 2400 dpi, and 100 dpm equates to 2540 dpi. The screen set Kodak_TF48M135r100R would run a 135 line screen on a ThermoFlex Mid 48-beam device, running at 2540 dpi.
If you require a screen set at a frequency or angle combination that is not contained in a default set, you can create it using the Screen Set Editor. Unlike normal threshold array screening, IS Screening cannot be customized within Prinergy. When choosing an IS screen instance in an output process template, you cannot modify the resolution, dot shape, frequency, or angle—they have been predefined in the screen instance. Instead, the ScreenSet Editor must create or modify a screen instance which contains all the required settings, such as resolution, dot shape, angle, frequency, and other attributes, such as height to width ratio of the halftone dot.
Continuous Screening must be selected when creating the screen set in ScreenSet Editor
If you want to use a given screen instance for seamless imaging, you must select the Seamless flag in Screen Set Editor.
Additionally, IS Screening allows the introduction of noise, which can be useful for hiding artifacts that may result when imaging to certain types of output devices like filmsetters. This may also prove to be a useful setting to adjust, if patterning is appearing in a given screen frequency or angle combination when imaged to plate.
The Screen Set Editor is installed on the Prinergy Primary or Evo server, so that the application has access to the same screen set directory accessed by the Output JTP. On a Prinergy Server, the screen set directory is found at \\PRIMARYSERVER\AraxiHome\AdobeExtreme\bin\TurboScreen\ScreenSets\Screen2GoVecT and on an Evo server, the Screen Set directory is found at \\EvoSERVER\C:\Program Files\Creo\Prinergy Evo 4.x.x\static_data\common\Turboscreen\ScreenSets\Screen2GoVecT .
The ScreenSet Editor allows you to edit, delete, or create new Screen instances. As with any application that is resident on a Prinergy Server, you should install a copy of RDC on a client machine, and use it to access the Primary server to run ScreenSet Editor.
After creating new IS screen sets, Prinergy output JTPs must be stopped and restarted, or Prinergy Evo stopped and restarted, for these new screens to be available to users. Any additional IS screen sets created will display in the Screen System menu. Considering that there is already a long list of normal Prinergy threshold array screen sets, and an additional 36 default IS screen sets, additional IS screen sets will cause the Screen System menu to become very long. You should prune the list of visible screen sets by moving any unneeded screen sets from the active Screen Set directory. You can do this by creating a new directory in the active Screen Set directory, and moving all unneeded screens into this directory, which effectively hides them from Prinergy or Prinergy Evo. Once the Output JTPs have been stopped and started, these screen sets will no longer be visible in the Screen System menu.
Note: Standard threshold array screen sets cannot be hidden in this manner.