Fanuc Robot S-420iL

Air filters and oil mist filter replaced at the same time

Sign off on the filter element replacement

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

Check robot movement and motor temperature

Check stop positions of the robot

1) Replacing J5--axis motor (M5)

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

3 Remove the J5--axis cover, the connector of the J5--axis motor (M5), then the plate. Cut the nylon cable tie. (See Section 8.2, ”Replacing the Cables.”)

4 Remove the bolt (M12 x 40) for mounting the motor, then remove the motor.

5 Remove the draw bolt and spline from the motor shaft.

6 Replace the motor with a new one. Also replace the O--ring (as a precaution). Reassemble the removed components. Be sure to mount the O--ring at the appropriate position. Use new motor mounting sealbolts. (In case of reusing sealbolts, apply LOCTITE No.242 to them. (Refer to section 6.1) Fasten the excess part of the cable to the plate with a nylon tie. See 8.2 for an explanation of how to lay the cable.

7 Apply grease to the reducer (Refer to section 3).

8 Perform mastering (Refer to section 5.3).

1) Check the following items once every three months. Additional inspection areas and times should be added to the table according to the robot’s working conditions, environment, etc.

Check whether the cable connected to the teach pendant is unevenly twisted.

If the ventilation portion of the control unit is dusty, tum off power and clean the unit.

Check the following items at the first quarterly inspection, then every year thereafter.

Check whether the jackets of the mechanical unit cables are damaged. Also check whether the cables are excessively bent or unevenly twisted. Check that the connectors of the motors and connector panels are securely engaged.See section 7.2.

Clean each part (remove chips, etc.) and check component parts for cracks and flaws.

Further tighten the end--effecter mounting bolts and external main bolts.

Grease to the balancer bushing. Refer to item 3.2. in every 6 month;

1) Replacing J4--axis motor (M4)

1 Set the posture of the wrist such that no load is applied to the wrist axis.

4 Remove four bolts (M12 x 40 2pcs, M12 x 55 2pcs) for mounting the motor, then the motor.

5 Remove the nut and take out the center gear.

6 Replace the motor with a new one. And reassemble it in a reverse order. Also replace the O--ring (as a precaution). 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 super gear.

7 Apply grease to the motor (Refer to section 3).

8 Perform mastering (Refer to section 5.3).