2. Maintenance of the Main Robot
2.1 Cautions on Maintenance and Inspection
When performing inspection or maintenance of the robot, strictly observe the following
precautions to protect yourself and coworkers.
• Be sure to turn off the main power switch of the controller before approaching
the robot for maintenance and inspection.
• When moving the robot by hand while the power is turned on, be sure to assure
the safe work and effect an emergency stop beforehand.
• In the above situation, if the work is to be done while the axis 3 motor brake
OFF switch is pressed, be sure to perform the work by two (2) persons.
One person should carry out the work while the other is monitoring the work
outside the hazardous zone. The latter person should watch the work and be
ready to turn off the controller switch if any abnormality occurs. Once the
controller power is turned off, the motor brake actuates even if the axis 3 motor
brake OFF switch is kept pressed.
• If the axis 3 motor brake OFF switch is pressed while the robot is carrying a
heavy workpiece, the axis 3 may drop suddenly. To avoid this, the customer
should take all necessary measures by themselves.
2.1.1 Clamping Hexagon Socket Head Cap Screws
This robot uses hexagon socket head cap screws at places requiring mechanical
strength. At the time of factory-assembly, lock adhesives are applied and each
screw is tightened with the following clamping torque.
When these screws are tightened again according to the inspection and
maintenance as stipulated in this manual, use a torque wrench, etc. to assure the
appropriate clamping torque.
The places which do not fall under the table below are detailed in the paragraph of
the replacement procedures.
Screw M4 M5 M6 M8 M10
Clamping torque 4.7 N·m 8.8 N·m 17 N·m 27 N·m 54 N·m
STE 85306
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