Fanuc Robot S-420iS

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 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) Replacing the J2/J3--axis motor (M2/M3)

i) Standard type (See Fig. 6.3(a))

2 Suspend the J3--axis arm with a rope. Also, suspend the J3--axis link for safety. (See Fig. 6.3(c).) (For S--420iR, suspend it as shown in Fig. 6.3(d).)

4 Remove the mounting bolts (M12×40) of the motor to be replaced, and remove the motor to be replaced.

5 Remove the nut, the input gear and the draw bolt in order.

6 Replace the motor, and remount a new motor reversing the above procedure. Polish the motor flange with an oil stone. Apply LOCTITE No. 242 to the draw bolt and the motor thread. Mount the O--ring correctly. Use new motor mounting sealbolts. (In case of reusing sealbolts, apply LOCTITE No.242 to them. (Refer to section 6.1) Be careful not to damage the tooth surface of the input gear.

7 Replenish the grease (Refer to section 3).

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

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?

Required Positions for Greasing

Refer to item 3.2 and list the positions where grease was applied

Sign off on the robot lubrication