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Doc. No. ZQ-OM01301-A
- 39 -
No.
Countermeasures
(1)
Oil mist in the supply air or particles in the piping cause clogging if they enter the ejector. This may
cause operation failure. Blow the air piping with air to eliminate particles. Installing the mist separator
and air filter for cleaner supply air is recommended. Perform regular maintenance on the mist separator
and filter. Refer to the product catalog or operation manual for details of the maintenance.
(2)
Substances adhering to the surface of the workpiece may enter the ejector, causing clogging.
Install an air suction filter with high filtration accuracy in the piping of the pad and ejector to protect against
foreign matter in the suction air (fine substances penetrating the built-in filter element). Perform regular
maintenance on the filter. Refer to the product catalog or operation manual for details of the maintenance.
(3)
Adjust the rated voltage so that the supply voltage for the solenoid valve is /-10% of the rated
voltage while the simultaneously energized equipment is ON. When the digital pressure switch is wired
to the common power supply, the rated voltage shall be maintained while the switch is energized.
(4) Check the correct connection of the power supply and wiring of plug connectors.
(5)
The connector assembly lead wire included with the product will break by repeated bending. When the
ejector is installed onto the moving part, use the wiring intended for moving parts. Fix the wiring to the
device so that it is not affected by vibrations.
(6)
If the supply pressure is lower than the operating pressure range, it may cause operation failure of the
main valve. If the supply pressure is higher than the operating pressure range, it may cause operation
failure due to early wear of seals. Adjust the supply pressure appropriate for the specification for each
port.
Ejectors (especially the manifold products) consume a large amount of air during operation. Ensure that
the supply pressure is within the operating range.
(7)
Vacuum pressure decreases if the release valve is energized while the supply valve is operating. Check
the control program and wiring.
(8) Leakage voltage may cause the valve to malfunction. Keep the leakage voltage at 0.72 V or less.
(9)
The gasket came out or was displaced during filter element maintenance or the valve assembly
replacement must be put back in the correct position before reassembly in order to avoid the leakage
of vacuum or air during operation. In this case, disassemble the parts and reassemble the gasket
correctly. If the gasket is lost or broken, replace it with a new one.
(10)
If the supply pressure during the operation of the ejector decreases, the generated vacuum pressure
decreases. Use an adequate flow rate so that the supply pressure is satisfactory when other air
equipment operates at the same time.
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Countermeasures