Long Name:

Applies to:

Description:

Enables swath overlapping and other imaging features unique to the current machine type.

On Spectrums and Proofsetters, this parameter enables special image data controls in the FDPE, as well as overlapping the swaths by 1/2. This is needed for certain proofing medias that use a donor/receiver imaging combination. When this parameter is enabled on Spectrums and Proofsetters, the media extra_scanlines parameter is ignored and a value of 2 extra scanlines is used in its place.

On VLF Flexo and all other thermal machines, this parameter enables various degrees of swath overlapping to overwrite difficult medias, such as flexographic medias. This results in each pixel being imaged multiple times, equal to the value set in overwriting plus 1.

When this parameter is enabled on a VLF Flexo machine, the media extra_scanlines parameter is still used, unless a 1200 dpi plot mode is selected, in which case the extra-scanlines parameter is ignored and a value of 0 is used in its place. (a 1200 dpi plot mode is when subscan_duplicate is set to 2). In other words, extra_scanlines is used like on other machines, except 1200 dpi internally forces extra_scanlines to 0.

The imaging time is increased by a factor of (overwriting + 1), as the carriage speed is reduced by the same factor. Some machines may compensate for this by increasing the NVS hdm drum speed parameter for that media type.

Type:

Default:

• 0

Range:

• 0 to 7 (Spectrum and Proofsetter)
• 0 to 15 (VLF Flexo and other thermal machines)

Notes:

This feature is supported on all trendsetter products, but not automatic platesetters (though it may work, we don't support it).

This feature requires the FDPE or better.

On Spectrums and Proofsetters, overwriting cannot be enabled with 1200 dpi imaging, i.e. the current mode subscan_duplicate parameter must be 1 if overwriting is enabled on the current media. Also for Spectrums and Proofsetters, the head must be 224 pps.

Negative orthogonality correction is not possible with this parameter enabled on any machine. This means very small plates or film that rest on the central registration pins and use the NVS gc sprot or gc vsprot parameters cannot be imaged with overwriting enabled.

This parameter is a renaming of "media spm" (special_plot_mode), which was a renaming of "media il" (interleaving).

For EL proofing (Spectrum EL models), this value is locked at 3 for proofing media.

For S plating (Spectrum EL, Spectrum S, Trendsetter S models), this value is locked at 1 for non-proofing media.

Partition:

See Also: