Mitsubishi MELFA CR1QA-700, Special Specifications Manual

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２ Robot arm
2-14
(2) About the use with the bad environment
This robot has protection methods that conform to IEC's IP65(all axis) standards (splashproof type). It has pro
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tection structure designed to prevent harmful effects caused by splashing water coming from various directions,
as the robot is operating. Recommended usage conditions.
1) The robot is designed for use in combination with machining device.
2) We are confirming examining with the cutting oil shown in Table 2-5 , and satisfying protection specification.
Our warranty does not cover damages or failure resulting from the robot being operated in any environment
where other cutting oils than those listed in the table are used (except cutting oils with respect to which the
robot's compatibility with the protection specification is verified through our operability evaluation) or where
the robot body may be directly splashed with water, oil or dust in quantities larger than stated in the protec
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tion specification.
3) Take measures so that the robot will not be exposed to water, oil and/or chips for a long period of time.
4) Robot's protection performance can be improved by pressurizing its interior. If you use a robot in an envi
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ronment where oil mist is present, it is recommended that the interior of the robot be pressurized to
ensure its reliability over a long period of time. Please supply the dry air for pressurization from the phi-8
joint (AIR PURGE) of the robot-arm base rear.
Table 2-6 ： Specification of the dry air for pressurization
The packing gets deteriorated with the passage of time and must be replaced as required. Table 2-7 provides
guidelines for replacing the packing.
Table 2-7 ： Packing replacement guideline
Failure to replace deteriorated packing permits water or oil to enter the interior of the robot, possibly causing it to
become inoperable.
Table 2-28 lists packings requiring replacement and corresponding robot covers. Packing required and liquid gas
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ket used therewith are available from dealer.
Also, entrained water droplets lead to the formation of rust on the robot, but would not usually affect the robot's
ability to operate normally.
The warranty is invalid for any faults that occur when the robot is used under the following conditions.
Also, if the cover and/or other parts are damaged by interferences caused by the peripheral devices and the
robot, the protection specification (seal performance, etc.) may be degraded. Therefore, please pay extra attention
when handling the robot.
Refer to Page 104, "6.2 Working environment" .
1) In surroundings that generate inflammable gases or corrosive gasses.
2) Atmosphere used excluding cutting oil shown in Table 2-5 .
3) Environment where the robot is exposed to water, oil and/or chips for a long period of time.
4) In surroundings where chips fall directly on the robot.In surroundings where the minimum diameter of chips
is less than 0.5mm.
5) Mist atmosphere exceeding the specification.
6) Pressurization by the dry air exceeding the specification of Table 2-6
Item Dew point Pressure
Specification The atmospheric pressure
dew point is -20 degree or
less.
0 to 0.01MPa
Environment
Whether or not robot is
pressurized
When packing must be replaced
General environment
Not pressurized
Note1)
Note1)
The pressurization inside the robot arm is unnecessary in general environment and clean room environ
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ment.
When signs of cracking or peeling are noted in the packing. Clean room
Not pressurized
Note1)
Oil mist Pressurized
Not pressurized When removing and installing the cover.