Document No.ZL-OM01001
- 27 -
Troubleshooting
■
Problems when using ejector/ vacuum pump system and troubleshooting
Trouble
Cause
Countermeasures
Initial
adsorption
failure
(It fails to
adsorb
during the
trial run.)
The adsorption area is too small;
the adsorption force is not strong
enough compared with the weight
of the work piece and the force
applied during transfer.
Increase the lifting force.
→ Increase the pad diameter
→ Increase the number of pads.
Vacuum pressure is too small, due
to leakage at the adsorption part or
generation of a space between the
pad and the work piece due to
deformation of the work piece.
Reduce the vacuum leakage (by increasing the
vacuum pressure).
→ Change the pad configuration. Increase the
adsorption area.
→ Change the pad material (e.g. to a material that
fits the uneven surface).
→ If the workpiece is thin, change to a suitable pad.
Vacuum pressure is too small, due
to leakage of vacuum pressure
because of permeability of the work
piece.
Check the vacuum pressure and the suction flow.
→ Change to an ejector with larger suction flow.
Vacuum pressure is too small due
to leakage from the vacuum piping.
→ Repair vacuum leaking part.
Suction flow is too small.
(Ejector performance is not high
enough.)
→ Change to an ejector with larger suction flow.
Suction flow is too small because
the piping diameter is too small and
the length is too long, causing
restriction of suction flow from the
ejector.
→ Increase the piping diameter and decrease
length on the vacuum side.
Vacuum pressure and/or suction
flow are too small, because supply
pressure
to
the
ejector
is
insufficient.
→ Measure the supply pressure when the vacuum
is generated, and increase the supply pressure to
the standard supply pressure. Especially when more
than one product is operated at the same time in a
manifold, the supply air can be insufficient, causing
decrease of the supply pressure
.
Vacuum pressure and/or suction
flow are too small, due to clogging
of the nozzle and the diffuser.
→ Remove foreign matter and substances sticking
to it. (Needs to be repaired.)
Perform flushing and mount an air filter on the
supply side to prevent it happening again.
Supply valve malfunction.<0}
Measure the supply voltage to the solenoid valve.
→ Revise the electrical circuit, wiring and
connectors.
→ Use within the rated voltage range.