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Maintenance 7. Joint #3
7.1 Joint #3 - Replacing the Motor
Maintenance
AC servo motor 400 W
Parts
Belt tensile jig*
Hexagonal
wrench
Cross-point screwdriver (#2)
Tools
Torque wrench
Feeler gauge (0.5 mm)
Belt tension meter
Cloth (cushioning)
* The belt tensile jig is an assembly jig. Use the jig when adjusting belt tension.
The brake is mounted on each joint to prevent the arm from lowering due to its own weight while the
Controller power is OFF or the motor is OFF status. The brake does not work during replacement.
Be careful when performing maintenance work.
When removing the Joint #3 motor, tilt the Arm #2 and press it against the Arm #2.
Reference: Maintenance: 7.1 Joint #3 - Replacing the Motor, Removal step (2)
When pressing the arm, put a piece of cloth or a similar material between the arms to avoid contacting each
other. This protects the arm surfaces from scratching and paint peeling off.
236
Name
width across flats: 2.5 mm
width across flats: 3 mm
width across flats: 4 mm
Qty.
1
2168684
1
1674582
1
For M5 hexagon socket set screws
1
For M4 hexagon socket head cap bolts
1
For M5 hexagon socket head cap bolts
1
For cross recessed head screws
1
For tightening torque control
2
For pulley position adjustment
1
Refer: Unitta U-505
1
For pressing arms
Note
C8 Rev.13
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