Auto Cutterunit - Sharp ER-04RP Service Manual

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ER+4RP
6-3-1. How to install the ribbon cartridge
(1)
(2)
(3)
Tghten the ink ribbon by rotating the ribbon cartridge knob
clockwise (arrow direction).
Fit the ribbon catiridge into the ribbon plate (or frame) with the
ribbon inserted between the ribbon mask and the print head.
After the ribbon cartridge is installed in position, rotate the ribbon
cartridae knob once again in the clockwise direction (arrow
directi~n) to remove the slackness in the ribbon.
6-3-2.
How to remove the ribbon cartridge
Pull up the ribbon cafiridge by holding the right or left side of it. If
there is difficulty in removal, push the cartridge to the right or left and
unlock the hook on one side before pulling up the cartridge for
removal.
6-4. Cleaning
(1)
(2)
7.
After using about 10 rolls of paper or after six months of use,
clean the printer to remove remrding paper dust and dirt. It is
desirable to clean by vacuuming (use a vacuum cleaner).
Thoroughly clean eve-y part of the printer by vacuuming dust
and dirt.
Use alcohol or benzine to wipe off dirt.
trichiene, or ketone detergents as these
damage the plastic parts.
Auto cutter unit
7-1. Maintenance and handling
7-1-1. Note for handling
(1)
Note or use
Never use thinner,
may deteriorate or
Do not use this unit to cut paper other than the specified record-
ing paper. Do not pull the paper while cutting it. It may damage
the blade, shortening the life.
(2) Note for storage
Avoid dust, foreign materials, high temperature, and high
humidity.
7-1-2. Cleaning
(1) Remove paper dust from the unit occasionally.
It is advisable to use a vacuum cleaner to remove dust.
(2) Use alcohol or benzine as washing liquid. Do not use thinner,
trichloroethylene, ketone, etc. which may damage the plastic
pars.
(3) After cleaning, lubricate as necessary.
7-1-3. Lubrication
There is no need to lubricate the unit until 150,000 cuts. If, however,
the blade becomes dull, or if cleaning has removed oil too much, or
when disassembly, assembly, or replace is performed, lubricate the
unit.
Gear pivot Maltemp
Brush
Lock lever shaft Maltemp Brush
Crank pin
Mo grease Brush
Movable blade sliding section
Mo grease Brush
7-2. Mechanism
and operating principle
7-2-1. General
The AC-2 and AC-3 are designed for use as the small-size dot printer
DP-600 and DP-505. It features a compact design.
The mechanism of this unit is composed of the four sections: the
frame section, the power transmission section, the detecting section,
and the movable blade mechanism section.
7-2-2. Mechanism and operating principle
(1)
(2)
(3)
Power transmission mechanism section
Cutter gear \
Fig.1
w
Fig. 1
The reduction gear train of this auto cutter unit is composed of
the motor gear attached to the motor shaft, the worm, and the
cutter gears (2 pcs.). When the motor gear turns one rotation,
the cutter gear turns 7/520 rotation (nearly equal to 1/74 rota-
tion). (Fig. 1)
Detecting section
The detecting section is composed of the mechanical contact
switch and the cutter gear cam.
It detects the home position of the movable blade (Fig. 2), the
turn position in partial cutting (Fig. 3), and returning of the mov-
able blade. When the blade is in home position, or when it
returns, the switch is ON. The position where the switch turns
from ON to OFF is the turn position of the blade in partial cut-
ting.
Fig.2
Cam
( +;
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/
Cutter gear
Fig. 2
Fig.3
Movable blade mechanism
Rotating movement is converted into a linear movement by the
crank pin to drive the movable blade to cut recording paper.
" Crank pin
Fig. 4
In full cut, the crank pin turns one rotation to return to the
home position. The movable blade moves 12mm.
@ Partiai cut
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Fig.5
Fig.5
In partial cut, the crank pin turns reversely to the home posi-
tion when the switch signal is received.
The movable blade moves 9mm.
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