Fanuc Robot S-420-iF

1) Replacing J6--axis motor (M6)

1 Remove loads from the robot’s wrist such as a hand and workpieces.

2 Turn off the power at the position of J5=--90 degrees.

3 Remove the cover, motor cover and cable connectors.

4 Remove J5--axis cover 2, a plate, a grommet and a clamp. (Do not remove plate and Teflon sheet attached to the J5--axis cover 2).

5 Remove rubber block mounting bolts and take out the cable.

6 Remove four bolts (M8×22) for mounting themotor, then remove the motor.

7 Remove the nut, input gear and the draw bolt.

8 Replace the motor with a new one. Reassemble the removed components. Polish the motor flange with oil stone. Apply Locktite No. 242 to the threaded portion of the motor shaft. Be sure to mount the O--ring at the appropriate position. Pay special attention so as not to scratch the tooth face of the input gear. Use new motor mounting sealbolts.

Warning: This lubrication process requires trained personnel with PPE!

Select the parts where grease was replaced

Cross-Roller Bearing Lubrication

Was the cross-roller bearing greased?

Select the positions where grease was applied

Sign off on the robot lubrication

Air pressure on the air regulator

Drop quantity during wrist or hand motion

Oiler level within the specified level

Check joints, tubes, etc. for leaks

Air pressure on the air filter unit

Check joints, tubes, etc. for leaks

Robot moves smoothly without unusual vibration or sounds

Check if the temperature of the motors is excessively high

Check the following items once every year.

Replace battery in the mechanical unit.

Cleaning each parts and inspection

Tightness of major external bolts

Greasing of balancer joint bearing

Supply grease to the bearing (only for the S--420i R). (See Section 3.2.)

Replace filter elements in the air filter unit.

Warning: Ensure the power is turned off before starting the procedure

Ventilation plug for J5-axis removed

New grease applied from the grease inlet until it comes out from the grease outlet

Plug at the grease outlet remounted

Sign off on the grease replacement procedure