EPSON Stylus COLOR 860/1160
Revision C
Operating Principles
Overview
32
2.1.1.3 Carriage Mechanism
The carriage mechanism for the Stylus COLOR 860/1160 is mostly the same
as for other ink jet printers except it is driven by a DC motor. See the table
below for the carriage motor specifications.
Table 2-2. Carriage Motor Specification
Unlike a stepping motor, the DC motor that drives the carriage can not detect
the current carriage position by referring to the pulses given. Therefore, a linear
scale is attached along the carriage operation range to enable the printer to
mechanically detect the carriage position. The linear scale is also used to
produce the print timing signal (PTS signal), to which the printer refers to for a
correct ink ejection timing.
For detailed information on the CR motor control circuit, see Section 2.2.
Figure 2-5. Carriage Mechanism (Top view)
The printhead, a core of the printing mechanism, is stored in the carriage unit.
When the adjustment lever is moved up and down, this printhead is maintained
tilt in a flexible and adjustable structure by the tilt adjustment mechanism.
Also, the parallelism adjustment levers, mounted on the left and right sides of
the carriage guide shaft, are used to set the carriage guide shaft parallel to the
platen when the shaft has been installed to the printer mechanism. After this
adjustment is completed, moving the PG adjustment lever sets the distance
between the platen surface and the printhead surface to one of two
possibilities: 1.14 mm or 1.84 mm. Moving the PG lever, you can rotate the
shafts of the carriage guide shaft which itself is decentralized to change the
distance. This is the mechanism that the user can use to adjust the appropriate
PG value according to the printing result or any other environmental conditions
such as thick paper.
Items
Specifications
Type
DC Motor with brush
Drive Voltage
+42 V +/- 5%(DRV IC voltage)
Internal Resistance
29.2 ohms +/- 25%
Inductance
30.8 mH +/- 25%
Drive Method
Constant Current Chopping
Driver IC
LB1947
PF Roller Timing Belt
Carriage Motor
Carriage Unit
Eject Roller
Paper Guide (Front)
PF Motor
Front Side
Rear Side
Parallelism
Adjust Lever
Fixing
Bushing
Carriage
Guide Shaft
CR Lock Lever
Содержание Stylus COLOR 1160
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Страница 28: ...C H A P T E R OPERATINGPRINCIPLES ...
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Страница 171: ...PSON Stylus COLOR 860 1160 Revision C ppendix Circuit Board Component Layout 171 Figure 7 5 C298PNL Component Layout ...