SMC Networks MWB 100 Series, Operation Manual

Page: 22 / 25

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[Used with air cylinder]
Reported failure Major causes Countermeasures
Lock is released and cylinder
does not operate smoothly.
Check the cylinder
and peripheral
equipment
①
Air piping is not
connected to the
cylinder or air
supplied to the
lock unit is not
adequate for
cylinder operation.
(Load factor is too
high)
・
Check the air piping of the cylinder
・
Increase the operating pressure of
the cylinder.
・
Use a larger cylinder.
②
Speed controller
mounted to the
cylinder is fully
closed. Gradually open the speed controller
from the fully closed position so that
the cylinder travels full stroke smoothly
at the optimum speed.
③
Speed controller is
meter-in control.
・
Change it to meter-out control.
④
Operation speed of
the cylinder is
below the limit of
minimum speed.
・
Adjust the piston speed using a
speed controller to keep the minimum
operation speed or higher.
・
Remove the factor of load fluctuation.
⑤
Solenoid valve
connected to the
cylinder does not
operate.
・
Check the power supply to the
solenoid valve
・
Check that the wiring of the solenoid
valve is correct.
・
Check that the piping of the solenoid
valve is correct.
・
Check if air is supplied to the
solenoid valve
・
Make sure that the solenoid valve is
not in manual lock status.
No problems are confirmed with
above. If the solenoid valve failure is
confirmed, repair it or replace it.
⑥
External guide of
the cylinder is
distorted or
warped.
Check the operating conditions to
replace with the optimum type and
size of the guide.
Locking Malfunction
Check the cylinder
and peripheral
equipment
①
Cylinder is too fast.
Decrease the speed by setting the
speed controller.
②
Air circuit is not a
recommended
balanced circuit.
(Excessive
cylinder output is
applied to the lock
unit)
Connect air by recommended
balanced circuit. (Refer to Page 13
to
14)