Datasheet

 Vacuum Ejector or Pump and Number of Vacuum Pads
Ideally, one pad should be
used for each ejector.
When more than one pad is attached to a single
ejector, if one of the workpieces becomes
detached, the vacuum pressure will drop, causing
other workpieces to become detached. Therefore,
the countermeasures listed below must be taken.
• Adjust the needle valve to minimise the
pressure fluctuation between adsorption and
non-adsorption operations.
• Provide a vacuum switching valve to each
individual pad to minimise the influences on
other pads if an adsorption error occurs.
Ideally, one pad should be
used for each line.
When more than one pad is attached to a single
vacuum line, take the countermeasures listed below.
• Adjust the needle valve to minimise the
pressure fluctuation between adsorption and
non-adsorption operation.
• Include a tank and a vacuum pressure
reduction valve (vacuum pressure regulator
valve) to stabilize the source pressure.
• Provide a vacuum switching valve to each
individual pad to minimise the influences on
other pads if an adsorption error occurs.
Vacuum line
Vacuum source
Precautions on Vacuum Equipment Selection and SMC’s Proposal
6
 Safety Measures
• Make sure to provide a safe design for a vacuum pressure drop due to a disruption of power supply, or a lack of supply air.
Drop prevention measures must be taken in particular when dropping a workpiece presents some degree of danger.
 Precautions on Vacuum Equipment Selection
As a countermeasure for power outages,
select a supply valve that is normally
open or one that is equipped with a
self-holding function.
Select a vacuum switching valve that
has a conductance that does not reduce
the composite conductance consisting of
the areas from the pad to the ejector.
For the release valve, select a 2/3 port
valve with a low vacuum specification.
Also, use a needle valve to regulate the
release flow rate.
• During the adsorption and transfer of a
workpiece, verification of the vacuum switch
is recommended.
• In addition, visually verify the vacuum
gauge when handling a heavy or a hazard-
ous item.
• The ZSP1 type is optimal for the adsorption
and transfer of small parts using a suction
nozzle with a small diameter.
• Install a filter (Series ZFA, ZFB, ZFC) before
the pressure switch if the ambient air is of
low quality.
Use a suction filter (Series ZFA, ZFB,
ZFC) to protect the switching valve and
to prevent the ejector from becoming
clogged. Also, a suction filter must be
used in a dusty environment. If only the
unit's filter is used, it will become
clogged quickly.
Ejector and number of pads Vacuum pump and number of pads
Tank
Model Selection
Front matter 20