Fanuc Robot 31i Model B

Unlatch the card PCB by pulling the claws on the two spacers outward

Check that the metal fittings of the spacers are raised

Align the card PCB insertion position by touching the spacer fixing end faces of the card PCB with the spacers

While aligning the card PCB with the spacers, lower the connector side slowly then cause the connectors to touch each other

Push the connector side of the card PCB slowly

Push in the spacer metal fittings

Warning: This maintenance check requires trained personnel with PPE!

Check the value on the diagnostics data No. 356 (for a built-in detector) or 357 (for a separate detector) of the CNC unit

Check whether the feedback cable is not disconnected and whether the connector is properly plugged

Pulse coder replacement procedure

Remove the four M4 hexagon socket head cap screws fastening the Pulsecoder

Remove the Pulsecoder and Oldham's coupling

Set the new Pulsecoder and Oldham's coupling on the motor

Fastening the Pulsecoder with the four M4 hexagon socket head cap screws in the reverse order of removing the Pulsecoder

Feedback cable plugging procedure

Open the claw of the socket outward. (Fig. a)

Extract the module slantly upward. (Fig. b)

Insert the module slantly into the module socket, with side B facing upward. (Fig. b)

Push the module downward until it is locked. (Fig. c) At this time, push it down with pushing two points of (*) in the figure.

Sign off on the module maintenance

Remove each cable from the control unit

Take out the control unit from the cabinet

Detach the two screws in the lower section of the case unit from the main board

Remove the cable from each connector on the main board

Move the cards and modules from the detached main board to another (replacing) main board

Attach the replacing main board

Connect the main board to the inverter board and fasten it with screws

Warning: Ensure the device is powered off before starting the procedure

Remove the screws from the lower section of the case unit and pull it out while unlatching claws from the upper section

Detach the cable from each connector on the main board. Also remove the fastening screws

Move the main board to the replacing LCD unit

Re-attach the cables, screws, and case unit

Sign off on the LCD unit replacement