●
Decr
ease vacuum and tension settings according to the table below, step by step (a to c), until you nd
settings that work.
Wide bands at least 4 cm apart
A small amount of vertical banding (like waves) can be seen, with a frequency from about 4 cm (1.6 in) to 10
cm (3.9 in), when printing large area lls of the same color.
The substrate is not in contact with all the ribs in the platen, which means that it is not fully controlled, so
wide wrinkles appear on the print zone. As the height of the printhead above the substrate varies, there are
local dierences in grain that can be seen as lighter or darker wide bands (see picture). To solve this, it is
important to improve substrate control in this zone and reduce the wrinkles.
Here are some tips for solving this problem:
●
Check the scan-beam height in the Internal Print Server. If it is higher than normal, try lowering it.
●
Align the printheads.
●
Decrease the curing temperature to reduce deformation.
●
Change from 4 to 6 colors to reduce grain.
ENWW Advanced print-quality troubleshooting 323
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