HP Designjet L25500 HP Designjet L25500 Printer Series - User's guide (first e - Page 39

Setting Input tension Vacuum level Description If too low If too high Tension is applied to the substrate from the input spindle. It needs to be constant over the full width of the substrate, thus substrate load is a critical operation. The substrate skews and may become increasingly wrinkled in the printing zone. Also, substrate advance may be irregular, resulting in horizontal banding. The substrate may be permanently deformed or damaged. Substrate advance problems may appear in extreme cases. The vacuum applied to the substrate at the printing zone helps to hold the substrate down on the print platen, keeping the distance to the printheads constant. The substrate may lift up off the platen and touch the printheads. This can smear the printed image, cause a substrate jam or even damage the printheads. For sticky substrates, friction could be too high and substrate advance irregular, resulting in horizontal banding or irregular grainy patches. Here are some more advanced settings, which you are not recommended to change, unless you have problems that you cannot resolve any other way. Substrate family Warm-up drying temperature offset Warm-up curing temperature offset Self-adhesive vinyl 10 0 Banner 10 0 Film 5 0 Fabric 5 0 Mesh 10 0 Paper-Aqueous 5 0 Paper-Solvent 10 0 HP Photorealistic 10 0 Cool-down drying temperature offset 0 0 0 0 0 0 0 0 Cool-down curing temperature offset 0 0 0 0 0 0 0 0 Minimum drying power 0.7 0.7 0.7 0.7 0.7 0 0.7 0 The various settings mentioned above are described below. Setting Warm-up drying temperature offset Warm-up curing temperature offset Cool-down drying temperature offset Description If too low If too high The temperature that the substrate in the print zone must reach before printing starts. Bleeding or coalescence may A longer time to start printing is appear in the first 200-300 mm of required. Vertical banding or ink the print. smears may occur. The temperature that the The beginning of the print is not substrate in the curing zone must fully dry, or looks oily. reach before printing starts. Substrate degradation (bubbles, adhesive detachment) at the beginning of the print. The safe temperature at which the substrate can be under the drying module without being damaged. At the end of a job, the substrate is not stopped until this temperature is reached. A long time is needed to finish the print. The substrate at the beginning of the next print may be damaged, because it has stopped moving under too high a temperature. This case is uncommon. Handle the substrate ENWW Add a new substrate type 35