Epson C40UX service manual Cap Mechanism, Wiper with the cap unit

Stylus C40UX/C40SX/C20UX/C20SX Revision A

2.1.6.2 Capping Mechanism

The capping mechanism covers the printheads with the cap holder to prevent the nozzle from increasing viscosity when the printer is in stand-by mode or when the printer is off. This product has valveless cap system. Air valve function used for the previous models pumps and ejects ink only inside the cap by absorbing ink with the valve open. By opening the Air valve, the negative pressure is decreased and only the ink inside the cap is ejected. (the ink is not absorbed from Ink cartridge or head cavity.)

But, valveless cap system, this operation is done out side of the capping area.

The CR moves to left side of the Cap assembly and the pump absorbs the ink inside the cap.

3.If the carriage moves to the left side, spring forces tends to force the cap back to its original position, but it stops at the wiping position due to the lever lock slider. (Refer to Figure 2-17. Wiping Position)

4.When the carriage moves to the left side, the head surface and wiper makes contact and wiping is performed. (Refer to Figure 2-17. Wiping Position)

5.Even when wiping is completed, the carriage moves further to the left side and when the hook on the carriage’s right side hits the lever lock slider lever, the lever lock slider’s hook is released. (Refer to Figure 2-17. Wiper Set Release)

Carriage unit Print head

	Viewed from front side
	CR unit
	The carriage
	pushes the lever.
	Slider cap	Wiper
	Right side from
	capping position
Printhead	Hook

Cap

Waste Ink tube

Figure 2-16. Cap Mechanism

	Figure 2-17. Wiper Set Position		Figure 2-17.	Wiping Position
		Print head	Carriage unit		Hook
Slide up
					The hook is
					released.

Also, unlike previous models, the cap unit is newly designed for this model as follows.

2.1.6.2.1 Wiper with the cap unit

Wiping control is carried out by the procedure shown below.

1.The carriage is moved to the wiper set position. (Refer to Figure 2-17. Wiper Set Position)

2.When the carriage moves to the wiper set position, the hook on the lever lock slider engages, locking the lever lock slider. (Refer to Figure 2-17. Wiper Set Position)

Wiper Print head

Figure 2-17. Wiping Figure 2-17. Wiper Release

Operating Principles Overview 36