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２ Robot arm
2-20
2.2.7 Protection specifications
(1) Types of protection specifications
The robot arm has protection specifications that comply with the IEC Standards. The protection specifications
and applicable fields are shown in Table 2-6.
Table 2-6 ： Protection specifications and applicable fields
The IEC IP symbols define the degree of protection against solids and fluids, and do not indicate a protective
structure against the entry of oil.
The IEC standard is described by the following "Information" And, the corrosion of the rust etc. may occur to the
robot with the liquids.
【Information】
・ The IEC IP20
It indicates the protective structure that prevents an iron ball 12
0
+0.05
mm diameter, which is being pressed
with the power of 3.1 kg±10%, from going through the opening in the outer sheath of the supplied equipment.
2.2.8 Clean specifications
(1) Types of clean specifications
The robot arm with clean specification is made by order. Please check the delivery schedule.
Table 2-7 ： Clean specifications
■ Precautions for use
1) A φ8 VACUUM coupling is provided in the base section of the robot arm for vacuum inside the robot arm.
(Refer to Fig. 2-23) When using the robot, connect this coupling with the vacuum generating valve (Refer to
Table 2-8) and vacuum pump (furnished by the customer).
2) To suck in the robot arm, use the vacuum generator of the specification shown in following a) and b).
a) When using the vacuum generator
Table 2-8 ： Specifications of vacuum generation valve (Confirmed in our company）
b) When using the vacuum pump
Assure the vacuum flow rate of 30-50L/min. And, secure the exhaust course from the pump not to affect
the power supply and the cleanness for the vacuum pumps.
Type
Protection
specifications
(IEC Standards value)
Classification Applicable field Remarks
RH-3FHxx15
Robot arm: IP20
General-purpose
environment speci-
fications
General assembly
Slightly dusty environment
Type Degree of cleanliness Internal suction Remarks
RH-3FHxx12C
ISO class 3
Note1)
Note1) The conditions necessary to guarantee cleanliness are as follows: clean room down flow greater then 0.3 m/s,
robot internal suction of 30 to 50 L/min, and installation of an exhaust duct at the rear of the robot’s main base. A
φ8 joint has been prepared at the rear of the base for suction.
・ Suck the inside of robot arm with
vacuum pump. (prepared by cus-
tomer)
・ Use it in the clean room with the
down flow (flow velocity 0.3 m/s
above).
The use of a vacuum generating valve
is recommended.
Type Maker
Air pressure
Note1)
Note1) It is the vacuum pump maker's written specification.
Quantity
MEDT 14 KOGANEI CORPORATION ・ Vacuum rate: 90.0 L/min(ANR)
1