Epson 4880 C Service Manual

EPSON Stylus Pro 4400/4450/4800/4880/4880CRevision COperating Principles Printer Mechanism Components 121CLEANING MECHANISM DRIVE
Figure 2-8. Drive Transmission Path
Figure 2-9. Cleaning Mechanism Drive LayoutFigure 2-10. Cleaning Mechanism Drive Components
ASF/Pump Motor
Planetary Lever (Spur Gear, 15.2)Combination Gear, 15.2, 25.6
Spur Gear, 19.2
Combination Gear, 13.6, 28.8
Pump Unit
ASF/Pump MotorPlanetary Lever
(Spur Gear, 15.2)Spur Gear, 19.2Combination Gear, 
13.6, 28.8
Combination Gear, 
15.2,...

EPSON Stylus Pro 4400/4450/4800/4880/4880CRevision COperating Principles Printer Mechanism Components 122DRIVE TRANSMISSION TO PUMP UNIT
1. The DE Lock Lever is moved to the right end by moving the Carriage Unit 
to the right end of the Carriage Shaft.
Figure 2-11. Switching Drive Transmission Path (1)
2. The ASF/Pump Motor rotates by the required step number in the clockwise 
direction as seen from the Motor Pinion Gear side.
3. When the ASF/Pump Motor rotates in the clockwise direction, the 
Planetary...

EPSON Stylus Pro 4400/4450/4800/4880/4880CRevision COperating Principles Printer Mechanism Components 123 †ASF/Pump Motor (Stepping motor)
When the transmission path is switched to the Pump Unit side by Carriage 
Unit movement and the DE Lock Lever, the ASF/Pump Motor can drive the 
ink maintenance system such as pump and wiper, etc.
Movements of the ASF/Pump Motor drive transmission to the Pump Unit side 
are shown below.
Note : Rotation of the motor in the clockwise direction as seen from the Motor...

EPSON Stylus Pro 4400/4450/4800/4880/4880CRevision COperating Principles Printer Mechanism Components 124 NOTE:The table below explains Ink System terminology.
Table 2-6. Explanation of Operation
Operation
Explanation
Initial Ink Charge • This is the operation where the head is filled with ink for the 
first time. When the first ink cartridge is inserted (after all 8 
colors have been inserted), the initial ink charge operation is 
performed automatically.
• The initial charge flag is set when the...

EPSON Stylus Pro 4400/4450/4800/4880/4880CRevision COperating Principles Printer Mechanism Components 1252.2.4  Carriage (CR) MechanismThis printer has a unique carriage mechanism for stable and high precision 
movement/printing of the on-carriage head for the print area of A2 paper width.
The Carriage mechanism is formed of the following components.
†Carriage Unit
†Carriage Shaft (front and rear)
†CR Motor
†PG/PO Motor
†CR_HP Sensor
†CR Encoder Sensor
†Multi Sensor
†PG Phase Sensor
†Cutter Solenoid
†CR...

EPSON Stylus Pro 4400/4450/4800/4880/4880CRevision COperating Principles Printer Mechanism Components 1262.2.4.1  Carriage Unit Movement ComponentsTwo Carriage Shafts, each covered with a linear plate, and eight rollers 
(bearings) form the structure supporting the carriage.
The main structural components of the carriage movement mechanism and the 
functions of these components are described below.CARRIAGE MECHANISM DRIVE
Figure 2-15. Drive Transmission PathFigure 2-16. Carriage Mechanism Drive...

EPSON Stylus Pro 4400/4450/4800/4880/4880CRevision COperating Principles Printer Mechanism Components 127 †CR Motor (DC motor)
The Carriage Unit moves left/right by the CR Motor drive. The Encoder 
Sensor installed in the Carriage Unit reads (linear encoder system) the slits 
of the CR Scale, and this signal is compared to the logic control value by 
the Main Board control circuit to perform feedback speed control. The 
control maintains high printing speed.
Drive transmission from the CR Motor to the...

EPSON Stylus Pro 4400/4450/4800/4880/4880CRevision COperating Principles Printer Mechanism Components 1282.2.4.2  Platen Gap Adjustment ComponentsThe Carriage Unit (= Print Head) installation position must always maintain a 
fixed distance from the paper surface in order to preserve printing precision.
The Carriage Unit is supported by 2 Carriage Shafts. The Carriage Unit moves 
up and down with the rotation of the Carriage Shafts because of the eccentric 
bushings attached to both ends of each Carriage...

EPSON Stylus Pro 4400/4450/4800/4880/4880CRevision COperating Principles Printer Mechanism Components 129DRIVE TRANSMISSION TO CARRIAGE SHAFT
1. The Planetary Lock Lever (along with the DE Lock Lever) are moved to the 
right end by moving the Carriage Unit to the right end of the Carriage Shaft.
Figure 2-21. Switching Drive Transmission Path (1)
2. The PG/PO Motor rotates by the required step number in the clockwise 
direction as seen from the Motor Pinion Gear side.
3. When the PG/PO Motor rotates in...

EPSON Stylus Pro 4400/4450/4800/4880/4880CRevision COperating Principles Printer Mechanism Components 130 †PG/PO Motor (Stepping motor)
When the transmission path is switched to the platen gap adjustment side 
by the Carriage unit movement and DE Lock Lever, the PG/PO Motor can 
automatically shift (rotation movement of Carriage Shafts, both front and 
rear) the PG position up or down.
Movements of the PG/PO Motor drive transmission to the Platen Gap 
adjustment side are shown below.
Note : Rotation of...