-77-
No. ZK2-OM01301
■
Countermeasure
No.
Countermeasure
(1)
Oil mist in the supply air or particles in the piping cause clogging if they enter into the ejector. This
may cause operation failure. Blow the air piping with air to eliminate particles. It is recommended
installing the mist separator and air filter for cleaner supply air. Perform regular maintenance for mist
separator and filter. Refer to the product catalogue or operation manual for details of the
maintenance.
(2)
Substances adhere to the surface of the workpiece may enter into the ejector, causing clogging.
Install an air suction filter with high filtration accuracy in the piping of the pad and ejector against
foreign matter in the suction air (fine substances penetrating the built in filter element). Perform
regular maintenance for the filter. Refer to the product catalogue 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 in the product will be broken by repeated bending. When
the ejector is installed to 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 because of early defect due to 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 operating. Check
the control program and wiring.
(8)
Leakage voltage may cause the malfunction of the valve. Keep the leakage voltage at 0.48V or less.
(9)
The gasket or check valve came out or displaced during filter element maintenance or valve
assembly replacement has to be put back to the correct position before reassembling in order to
avoid the leakage of vacuum or air during operation.
If the gasket or check valve 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. Apply adequate flow rate so that the supply pressure is adequate when other air
equipment operating simultaneously.
(11)
If the check valve has a problem, vacuum pressure does not increase adequately. In case of
individual exhaust, if the ejector is operated with the exhaust port is pressurized or blocked, the check
valve is deformed and held in the filter case vacuum path, making sealing impossible.
(12)
The parts around the vacuum port of this product are designed to be used with vacuum
pressure. With the vacuum pump system, there is no release air to the atmosphere from a silencer.
When the vacuum is released, the compressed air increases the pressure of the vacuum port and the
filter case gasket may come out. Select the vacuum pad which shape allows smooth exhaust of
release air to the atmosphere and avoid clogging.
