Epson G3 Series User Manual

Maintenance 11. Ball Screw Spline Unit
158 G3 Rev.14
11.2 Replacing the Ball Screw Spline Unit
A brake is mounted on the Joint #3 motor 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).
Note that the brake will not work during the replacement procedure.
Move the shaft down to its lower limit before starting the replacement procedure by
following the removal steps from (1) to (3).
Name
Quantity
Note
Maintenance
parts
Ball Screw Spline Unit 1
Each manipulator model
(Refer to Maintenance:
15. Maintenance parts)
Grease
For Ball Screw Spline Unit (AFB grease)
Proper
quantity
Tools
Hexagonal wrench (width across flats: 3 mm)
1
For M4 screw
Torque wrench
1
Nippers
1
For cutting wire tie
Cross-point screwdriver
1
Only for Cleanroom-model
Force gauge
1 Belt tension
98 N (10 kgf) / 74 N (7.5 kgf)
Suitable cord (Length about 1000 mm)
1
For belt tension
Wiping cloth
1
For wiping grease (Spline shaft)
Material
Wire tie
2
Ball screw
spline 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
affects only
Joint #3. When the brake release switch is
p
ressed, the brake for Joint #3 is released simultaneously.
Be careful of the
shaft 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 step is only for Cleanroom
-model (C with bellows option).
Remove the bellows. For details, refer to Maintenance: 10. Bellows.
(6)
Remove the arm
top cover and arm bottom cover.
For details, refer to Maintenance: 3. Covers.

Epson G3 Series Specifications

General

Brand	Epson
Model	G3 Series
Category	Robotics
Language	English