HP Designjet L25500 HP Designjet L25500 Printer Series - User's guide (first e - Page 38

Substrate family Paper-Solvent HP Photorealistic Drying temp. 50 50 Curing temp. Heating Autoairflow tracking 80 30 Yes 100 30 Yes Cutter Yes Yes Substrate -advance adjust. Input tension 0 15 0 15 Vacuum level 15 30 The various settings mentioned above are described below. Setting Description If too low If too high Drying temp. Curing temp. Heating airflow Auto-tracking The heat applied in the printing zone removes water and fixes the image to the substrate. Print-quality defects such as banding, bleeding and coalescence may occur. Thermal marks may be seen on the substrate; they may appear as vertical bands in some colors. The substrate may wrinkle on the platen, causing vertical banding, ink smears or substrate jams. Curing is needed to coalesce the latex, creating a polymeric film which acts as a protective layer, while at the same time removing the remaining co-solvents from the print. Curing is vital to ensure the durability of the printed images. The print may emerge not fully polymerized, so that the ink smears when rubbed with a finger. The print may appear wet, after printing or later. The substrate may wrinkle under the curing module, causing defects such as bubbles or liner detachment. The substrate wrinkles may also cause vertical banding or ink smears at the beginning of the following plot. Airflow helps to remove the evaporated water from the print zone and thus allows more efficient drying. Print-quality defects such as banding, bleeding and coalescence may occur. The printer may not reach the expected temperature in the print zone, causing defects such as banding, bleeding and coalescence. Poor text and line quality may be seen. The substrate-advance sensor (also known as OMAS) is located under the print platen; it can track the substrate advance automatically. Disable the sensor in the following cases: ● The substrate is porous and allows ink to pass through to the platen. Clean the sensor after using this substrate. ● You are instructed to do so by the front panel, because the sensor is dirty or unable to track this particular substrate. Cutter Substrate-advance adjust. The printer's built-in cutter can cut the substrate automatically between each print. Disable the cutter in the following cases: ● You want to use the take-up reel. ● You want to cut the substrate manually. ● The leading edge of the substrate tends to curl and cause substrate jams. Your printer was calibrated at the factory to ensure that it advances the substrate accurately when using supported substrates in normal environmental conditions. However, you may find it useful to adjust the substrate advance when printing on unsupported substrates or in unusual but stable environmental conditions. Dark lines appear when you use up to six passes. Graininess appears when you use eight or more passes. White lines appear when you use up to six passes. Graininess appears when you use eight or more passes. Handle the substrate 34 Chapter 4 Handle the substrate ENWW