Trouble Shooting - SMC Networks ZXP7 11 X1 Series Operation Manual

9.Trouble shooting

Condition &
Description of
improvement
Gripping area is small.
(Lifting force is lower than the
workpiece mass.)
Vacuum pressure is low.
(Leakage from gripping surface)
(Air permeable workpiece)
Initial gripping
Inadequate supply pressure of
problem (During
vacuum ejector
trial operation)
Clogging of vacuum ejector
(Infiltration of foreign matter during
piping)
The pressure just before the
supply (P) port is low.
Late vacuum
achieving time The set vacuum pressure for the
(Shortening of suction verification is too high.
response time)
Fluctuation in supply pressure
Fluctuation in
Vacuum pressure may fluctuate
vacuum pressure
under certain conditions due to
ejector characteristics.
Occurrence of
abnormal noise Intermittent noise may occur
(intermittent noise) under certain conditions due to
from exhaust of ejector characteristics.
vacuum ejector
Clogging of the silencer
Clogging of the mesh
Gripping problem
over time
(Gripping is
normal during trial
Presence of foreign matter in the
operation.)
ejector.
Cup (rubber) deterioration,
cracking, etc.
The increase of stickiness due to
the wearing of the cup (rubber).
Workpiece is not
released.
Vacuum pressure is too high.
Contributing factor Countermeasure
Recheck the relationship between workpiece mass
and lifting force.
- Use a suction cup with a large gripping area.
- Increase the quantity of suction cups.
Eliminate (reduce) leakage from gripping surface.
- Reconsider the shape of a suction cup.
Check the relationship between suction flow rate and
arrival pressure of vacuum ejector.
- Increase gripping area.
Measure supply pressure in vacuum generation state.
- Use standard supply pressure.
- Reconsider compressed air circuit (line).
Remove foreign matter.
Depending on the piping volume (piping length and
diameter), if the pressure just before the supply (P)
port falls below 0.5MPa, the performance such as
vacuum pressure may reduce.
- Raise the upstream pressure,and the pressure just
before the supply (P) port becomes 0.5MPa.
Set to suitable setting pressure.
Reconsider compressed air circuit (line).
(Addition of a tank etc.)
Lower or raise supply pressure a little at a time, and use
in a supply pressure range where vacuum pressure
does not fluctuate.
Lower or raise supply pressure a little at a time, and
use in a supply pressure range where the intermittent
noise does not occur.
Replace the silencer.
Add a filter to supply (compressed) air circuit.
Clean the mesh periodically as necessary by washing,
air blow and so on or replacing plate B.
Refer to "7.2 Maintenance for suction cup".
Remove foreign matter.
Replace the ejector
Add a filter to supply (compressed) air circuit.
Replace cups.
Check the compatibility of vacuum cup material and
workpiece.
Replace cups.
Check the compatibility of the cup material and
workpiece.
Set the vacuum pressure to the minimum value
necessary.
-49-
No. TQ1230001-OM104-C