3. PRINTER'S MECHANICAL PARTS3.1 Overview of the Printer's Mechanical PartsThe printer's mechanical parts consist of the BJ cartridge, carriage, purge section, andpaper feed section. Each part is explained below.3.1.1 CarriageThe carriage holds one BJ cartridge in place. The carriage belt driven by the carriagemotor (DC motor) moves the carriage horizontally back and forth across the paper.Regarding the carriage's position control, the initial position is detected when thecarriage goes against the right wall which is the home position.After that, the carriage position is detected by reading the pulse from the encoder film.The paper spacing position is read from the carriage position when the carriage goesagainst the left wall.3.1.2 Purge sectionThe purge section, driven by a dedicated purge motor, consists of the wiper, pump,cap, and carriage lock.The wiper maintains the head face surface to ensure high-quality printing. The inksuction feature enables the ink to be readily ejected from the nozzles.When the BJ cartridge is not in use, the nozzles are protected by a cap, and thecarriage is locked in place.The motor's running direction controls the ink suction operation or capping/wiping/valve open/closing operation.Part 3: Technical Reference S63003-12CarriagePaper Feed SectionPurgeFigure 3-8 Printer's Mechanical Parts