HP Stitch S1000 User Guide - Page 76

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. A single roll will last approximately 80 liters; this may take about a month, at a usage level of 10,000 m²/month (100,000 ft²/month). An alert is displayed when 75% of the roll has been used, and again when 95% of it 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 81. 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 cancelled unnecessarily. 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 one or two foams from the left spittoon every time the cleaning roll is replaced. The foam is provided with the printhead cleaning kit. Ink deposits The printer can check the firing capacity of each single nozzle. Doing so causes small amounts of ink to accumulate close to the drop detector. This ink gradually forms ink deposits that need to be cleaned. How to work with ink system components Ink cartridges Remove an ink cartridge An ink cartridge should be removed and replaced when it is empty or past its expiry date. An empty cartridge is indicated in the Internal Print Server and by an orange blinking light beside the cartridge itself. You may also decide to remove a cartridge if it contains little ink and you want to provide for a long period of unattended printing. The printer can continue printing without any ink cartridges for at least 10 minutes, depending on the print mode and the job being printed. Therefore, cartridges can be replaced while printing continues. A functional ink cartridge is required in order to start a new job. 70 Chapter 7 Handle the ink system ENWW