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Stylus C40UX/C40SX/C20UX/C20SX Revision A
Operating Principles Overview 35
2.1.6 Ink System Mechanism
Ink system mechanism consists of pump unit (include the CR lock lever) and capping
mechanism. Ink system mechanism drives the pump unit that presses cap to the
printhead and ejects ink from ink cartridge, head cavity and cap to the waste ink pad.
2.1.6.1 Pump Unit & Wiper mechanism
The pump unit is driven by PF motor. PF motor drive is always transmitted to the paper
feeding mechanism and pump unit through the following gears. Refer to the Figure
2-15.
PF Motor Pinion Gear (CCW)
→
Spur Gear 60 (PF Roller)(CW)
→
Spur Gear 10.8(CW)
→
Combination Gear 18, 28 (CCW)
→
Spur Gear 27.2 (CW)(Pump unit)
Table 2-4. PF motor rotational direction & Ink System Mechanism
(*1): The PF Motor rotational direction = seen from the right side of the printer.
Following figure shows the overview of the pump mechanism operation.
Figure 2-14. Pump mechanism
Figure 2-15. PF motor drive transmission path to the Pump unit
Directions Functions
Counterclockwise (*1)
• Absorbs ink by the pump unit
• Set the CR lock lever
Pump unit
Spur Gear 27. 2
Combination Gear 18, 28
Spur Gear 10. 8
Pump unit
Cap unit