HP Latex R2000 User Guide - Page 96

There are three categories of printheads. When put into the printer for the first time, you can connect each printhead to a slot of the appropriate category: ● Universal printheads. These printheads, when brand new, can be connected to any slot except the optimizer and white slots, becoming committed to that color once purged and ready to print. ● Optimizer printheads can be put into optimizer slots only, and can never be swapped to other slots, whether new or used. TIP: When you plug a printhead into a slot for the first time, HP recommends marking that printhead visibly to identify its position, as the printhead can be unplugged at any moment for various reasons, but it will only work again if put in the same slot as before. If you have installed the white upgrade kit, you have an additional category: ● White printheads can be put in white slots only, and can never be swapped to other slots, whether new or used. Printhead cleaning roll The printhead cleaning roll is a roll of absorbent material used in the normal operation of the printer to clean the printheads periodically (at the beginning and end of printing, on printhead check and clean, and so on). This helps the printheads to deliver continuous ink and maintain print quality. The roll should be replaced whenever it is used up, to avoid damaging the printheads. The frequency of replacement depends on your use of the printer. The average life of a single roll is 20 liters of ink, but significant variability is expected, depending on how you use the printer. 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 plate 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, 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, and the right blades approximately every 750,000 carriage swaths. 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. 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. 88 Chapter 7 Handle the ink system ENWW