HP Latex 2700 User Guide 3 - Page 92

differences can be significant. For example, a single roll can last 20 L with low-productivity printing, 30-40 L with average productivity, or more than 60 L with really high-productivity printing. An alert is displayed when 95% of the roll has been used. You can choose to replace the roll at any time. The printer will not print when the roll has been 100% used. If there is not enough of the roll to start a new job, the printer cancels the job. To change the printhead cleaning roll, see Replace the printhead cleaning roll on page 108. The printhead cleaning kit can be ordered in the normal way. TIP: You should not touch the printhead cleaning roll except when you need to replace it. Any interference with the roll may prevent the printer from keeping track of roll usage, in which case you may see spurious error messages, and a printing job may be canceled unnecessarily. When you need to replace a roll, always follow the instructions of the Internal Print Server. Printhead-cleaning rubber blades The printhead-cleaning rubber blades are used to wipe the printhead nozzles in every carriage pass. The printer uses two blades on the right (hard and soft), and one blade on the left (the same hard blade as the one used on the right). Each blade has a limited life, and you should replace them whenever the printer prompts you to do so. Whenever a blade is replaced, following the steps in the maintenance widget, the printer calibrates its height with respect to the undercarriage, for optimal performance. The left blade should be replaced twice as often as the cleaning roll; the right blades should last for several cleaning rolls. The replacements are automatically prompted by the printer. Every time a new blade is mounted in the printer, its height with respect to the scan-axis undercarriage must be calibrated using the appropriate diagnostic test from the Internal Print Server (following the instructions of the Internal Print Server). Blades are automatically recalibrated during use to compensate for wear. Aerosol filters The printheads produce many fine droplets of ink, most of which are placed accurately on the substrate. However, a small proportion of these droplets escape sideways; the two aerosol filters are placed on either side of the printhead carriage to intercept them. The filters should be changed every time the printhead cleaning roll is replaced. They are provided with the printhead cleaning kit. Left spittoon The left spittoon is a rectangular piece of foam that allows the printhead nozzles to be refreshed at the left side, before printing a pass from left to right. Change the left spittoon foam when all the cleaning kit parts are replaced. The foams are provided with the printhead cleaning kit. The left spittoon foam should be replaced whenever you have used 25%, 50%, 75%, or 100% of the printhead cleaning roll; replacement is automatically prompted by the printer. CAUTION: If you fail to replace the spittoon foam when prompted, this may lead to cross-contamination between printheads, in which case all affected printheads may need to be replaced. Printhead-cleaning waste bottle The waste bottle contains a mixture of ink additives and water from the printhead cleaning roll system. Printhead-cleaning rubber blades 85