Epson LS3-401 series

Maintenance 8. Arm #4
124 LS Rev.10
Joint #4 motor
Installation
(1)
Mount the motor plate to the Joint #4 motor.
At this point, the m
otor cables must be in the
convex
shape side of the plate.
2-M4×8
Set Screw
+ Bushing
Pulley
2-M4×10
Motor Plate
(2)
Mount
the pulley to the Joint #4 motor.
Be sure to fit the end face of the pulley to
the
end face of the motor shaft.
Tighten one of the set
screws vertically on the flat face of the motor shaft.
Insert a
bushing into the other set screw hole to prevent damage to the motor shaft.
Then, tighten
both set screws.
(3)
Place the pulley around the U1 belt and
p
lace the Joint #4 motor unit in the upper
face of the A
rm #2.
Joint #4
Motor Unit
3-M4×12 +
Washer
Motor Plate
(4)
Loosely secure the Joint #4 motor unit to
Arm
#2.
Make sure
the motor unit can be moved by
hand
, and it will not tilt when pulled. If the
unit is
secured too loose or too tight, the belt
will not have
the proper tension.
Make sure the gear
grooves of the belt are fit
into those of the pulleys completely.
(5)
Apply the proper tension to the U1 belt and
secure
the Joint #4 motor unit.
Pass
a suitable cord or string around the
Joint #4 motor unit near its mounting plate
.
Then, p
ull the cord using a force gauge or
similar tool to apply the specified tension
shown in the figure
.
U1 belt tension
LS3 = 39 N (4.0 ± 0.5 kgf)
LS6(a) = 39 N (4.0 ± 0.5 kgf)
LS6(b) = 58 N (5.9 ± 0.5 kgf)
3-M4×12
+ Washer
Force Gauge
Joint #4
Motor Unit
To
check belt tension with the tension meter, refer to Maintenance: 8
.4 Checking the
Timing Belt Tension (U1, U2 Belt).
When replacing the motor of the Joint #4,
remove the cap from the old motor and
install it to the new one.
If the Manipulator is operated while the cap
is not installed, the motor may be
damaged
due to entering of the foreign materials into
the rotating part of
the motor sensor and
interference of the rotating part and the
cables.
cap
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NOTE
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NOTE
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NOTE