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2.2.1 Printer Mechanism
The printer mechanism of this printer uses a drop-on-demand ink jet system similar to the system
used on all other EPSON ink jet printers. However, the printhead in this system is completely
redesigned to make it more compact and ensure a high level of reliability. The figure below shows
the structure of the printhead and ink supply system.
Piezo When a drive pulse (voltage) is applied, this element pushes the vibration plate,
compressing the cavity for ink injection from the nozzle.
Cavity Ink supplied from the ink cartridge is stored in this space and is ejected fr
om the nozzles when the vibration plate compresses this area.
Nozzles These eject ink against the paper’s surface in response to the application of the
print signal. There are 64 (black head) or 48 (color head) individual nozzles
making up the printhead.
Cartridge Needle
Printhead Driver Board
Ink Supply Tube
Nozzle Plate
Nozzle
Ink Supply Tank
Cavity
Piezo
Nozzle Plate
Piezo
Figure 2-2. Structure of Printhead
Operating Principles Stylus Pro XL
2-2 REV.-A