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Large format wall covering tiles not matching up

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HP Latex 570
Microsoft Windows 7 (64-bit)

Looking for some help on printing large format wall coverings. The issue we are having is that the tiles were are printing are 15 to 18ft long and the tiles are not matching ( registering ) from top to bottom. Sometimes tile 1 and 2 are off by 1/4in. then the other tiles can be off by 1/8th to 1/2in. If they would all be off by the same amount then we would not have a problem, but since they are inconstistant it makes for a very challenging install and sometimes unacceptable to our client. ( Art Gallery ).


Average tile size = 50in x 16ft

Average tile quantity for murals is 3 to 6 tiles

Every other tile is rotated at the print stage for colour consitency

Media = DigiScape 350 17mil canvas ( no adhesive )

Roll sizes = 54" x 150' and 300'

Running with the tension bar and OMAS enabled

Rip = Onyx12



Any help would be greatly appreciated.



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I tried different solutions like- Vertical compensation in Caldera, lower temp, different printing mode and so on...but the result wasn't as expected....and then I found this in manual but the last sentence says it all:


Substrate has shrunk or expanded
During the printing process, some substrates may shrink, while others may expand. If this happens, the
dimensions of the print will not be correct.
As a general rule, you can expect the following percentages of shrinkage:
● Banner: less than 2%
● Self-adhesive vinyl: less than 0.5%
● Backlit: less than 0.5%
● Paper: less than 0.5%
● PP & PE synthetics: less than 1%
The framing problem may be solved by printing a sample and adjusting the size of the image in the RIP. You
may reuse this value for all your future prints with the same substrate, although special care must be taken
when using banners, as the shrinkage may vary up to 1% depending on the amount of ink used in the print.
You can expect the following variations from one print to another:
● Banner: less than 0.3%
● Self-adhesive vinyl: less than 0.1%
● Backlit: less than 0.05%
● Paper: less than 0.1%
● PP & PE synthetics: less than 0.4%
To solve the tiling problem and improve the repeatability of the printed size, you are recommended to ensure
that the substrate-advance sensor is enabled in the RIP's substrate preset, as this will improve the stability of
the prints over time. You are also recommended to tile together areas with similar amounts of ink. If this is
not possible, print the areas with different amounts of ink as different jobs and modify the length of the job
with less ink in the RIP to match its size with the job with high ink content.
Some RIPs may provide a scaling option that allows you to compensate easily for substrate shrinkage or
expansion; see your RIP documentation.
If you experience tiling issues when using the take-up reel, try loading the take-up reel with the printed side
inwards to reduce the deformations, or print without the take-up reel if possible.

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