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4.7.2
Precautions during ser vice work
1.
Precautions when removing a motor (Cartesian robots and vertical mount single-axis robots)
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WARNING
The vertical axis will slide down when the motor is removed, causing a hazardous situation.
• Turn off the controller and place a support under the vertical axis before removing the motor.
• Be careful not to let your body get caught by the driving unit of the vertical axis or between the vertical axis
and the installation base.
2.
Be careful when removing the Z-axis motor (SCARA robots)
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WARNING
The Z-axis will slide downward when the Z-axis motor is removed, causing a hazardous situation.
• Turn off the controller and Place a support under the Z-axis before removing the Z-axis motor.
• Be careful not to let your body get caught by the driving unit of the Z-axis or between the Z-axis drive unit and
the installation base.
3.
Do not remove the Z-axis upper limit mechanical stopper
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CAUTION
Warning label 4 is attached to each SCARA robot. (For details on warning labels, see "3. Warning labels" in "Safety
instructions.")
Removing the upper limit mechanical stopper installed to the Z-axis spline or shifting its position will damage the
Z-axis ball screw. Never attempt to remove it.
4.
Use caution when handling a robot that contains powerful magnets
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WARNING
Powerful magnets are installed inside the robot. Do not disassemble the robot since this may cause injury.
Devices that may malfunction due to magnetic fields must be kept away from this robot.
See "6. Cautions regarding strong magnetic fields" in "Safety instructions" for detailed information on strong magnetic fields.
5.
Use the following caution items when disassembling or replacing the pneumatic equipment.
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WARNING
Air or parts may fly outward if pneumatic equipment is disassembled or parts replaced while air is still supplied.
• Do service work after turning off the controller, reducing the air pressure, and exhausting the residual air from
the pneumatic equipment.
• Before reducing the air pressure, place a support stand under the Z-axis (2-axis robots with air driven Z-axis)
since it will drop under its own weight.
6.
Use caution to avoid contact with the controller cooling fan
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WARNING
• Touching the rotating fan may cause injury.
• If removing the fan cover, first turn off the controller and make sure the fan has stopped.
7.
Precautions for robot controllers
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CAUTION
• Back up the robot controller internal data on an external storage device. The robot controller internal data
(programs, point data, etc.) may be lost or deleted for unexpected reasons. Always make a backup of this data.
• Do not use thinner, benzene, or alcohol to wipe off the surface of the programming box. The surface sheet may
be damaged or printed letters or marks erased. Use a soft, dry cloth and gently wipe the surface.
• Do not use a hard or pointed object to press the keys on the programming box. Malfunction or breakdown
may result if the keys are damaged. Use your fingers to operate the keys.
S-23
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