Epson LS20 Series User Manual

Maintenance 10. Ball Screw Spline Unit
LS20 Rev.4 135
10.2 Replacing the Ball Screw Spline Unit
A brake is mounted on the motor of Joints #3 and #4 to prevent the shaft from moving
down due to the weight of the end effector while the power to the Controller is OFF or
while the motor is in OFF status (MOTOR OFF).
Move the shaft down to its lower limit before the replacement procedure following the
removal steps.
Name
Quantity
Note
Maintenance
parts
Ball Screw Spline Unit 1
Each manipulator model
(Refer to Maintenance:
14. Maintenance parts)
For Ball Screw Spline Unit (AFB grease)
Proper
quantity
6012557
Tools
Hexagonal wrench
width across flats: 3 mm
1
For M4 screw
width across flats: 4 mm
1
For M5 screw
Torque wrench
1
Nippers
1
For cutting wire tie
Cross-point screwdriver (#2)
1
Wiping cloth
1
For wiping grease (Spline shaft)
Material
Wire tie
-
Grease
For Ball Screw Spline Unit (AFB grease)
Proper
quantity
-
Ball
Screw
S
pline Unit
Removal
(1)
Turn ON the Controller.
(2)
Push down the shaft to its lower limit while pressing the brake release switch. Be
sure to keep enough space and prevent
the end effector hitting any
peripheral
equipment.
The brake release switch is applied to both Joints #3 and Joint #4.
When the brake release switch is pressed, the respective brakes of the Joint #3 and
Joint #4 are
released simultaneously.
Be careful of the
shaft falling and rotating while the brake release switch is
being
pressed
because the shaft may be lowered by the weight of an end effector.
(3)
Turn OFF the Controller.
(4)
Detach the wires/tubes from the
end effector, and remove the end effector.
(5)
This s
tep is only for Cleanroom-model.
Remove the
bellows. For details, refer to Maintenance: 9. Bellows.
(6)
Remove the
Arm Top Cover and Arm Bottom Cover.
For details, refer to
Maintenance: 3. Covers.
(7)
Remove the following.
Joint #3 motor unit, Joint #4 motor unit
For details, refer to
Maintenance: 7.1 Replacing Joint #3 Motor s.
Maintenance:8.1 Replacing Joint #4 Motor s.

NOTE

Epson LS20 Series Specifications

General

Brand	Epson
Model	LS20 Series
Category	Robotics
Language	English