5-59
CHAPTER 5 Periodic Inspection
6 Replacing the bellows
The XC series robots use bellows to prevent dust generation from the spline
shaft. If the bellows are broken, replace them as explained below. For bolt
tightening torque in this work, see Table 5-2. Perform the replacement work
while referring to Table 5-3 and Fig. 5-53.
1) Prepare the following tools and items.
• Hex wrench set
• Phillips-head screwdriver
2) Turn off the controller.
3) Place a sign indicating that the robot is being inspected, to keep others from
operating the controller switch.
4) Enter the safeguard enclosure.
5) Remove the end effector.
6) Loosen set screws 3, 9, 15 located on the bellows bottom clamp plate. (There
are two pieces each.)
7) Remove the screws and bolts 1, 7, 13 on the bellows top clamp plate.
8) Pull out the bellows bottom clamp plates from the spline shaft.
9) Replace O-rings 6, 12, 18 tted to the spline shaft with new ones.
10) Fit new O-rings 5, 11, 17 to one of the bellows bottom clamp plates, insert
the bellows end between the two clamp plates, and tighten bolts 2, 8, 14 to
fasten them.
WARNING
THE MOTOR AND SPEED REDUCTION GEAR CASING ARE EXTREMELY
HOT AFTER AUTOMATIC OPERATION, SO BURNS MAY OCCUR IF
THESE ARE TOUCHED. BEFORE TOUCHING THESE PARTS, TURN OFF
THE CONTROLLER, WAIT FOR A WHILE AND CHECK THAT THE
TEMPERATURE HAS FELL DOWN SUFFICIENTLY.
CAUTION
O-RINGS 4, 10, 16 ARE FITTED TO THE TOP OF THE BELLOWS, SO BE
CAREFUL NOT TO DROP THEM INTO PERIPHERAL UNITS.
CAUTION
O-RINGS 5, 11, 17 ARE FITTED TO THE BOTTOM OF THE BELLOWS, SO
BE CAREFUL NOT TO DROP THEM INTO PERIPHERAL UNITS.
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