Troubleshooting - SMC Networks C96N C Series Operation Manual

5. Troubleshooting

① Cylinder with lock
Reported failure
Lock is not released. Check the lock unit
Cylinder does not and peripheral
operate. equipment.
Lock is released and Check the cylinder
cylinder does not and peripheral
operate smoothly. equipment
Check the lock unit
Locking Malfunction and peripheral
equipment.
Major causes
Air piping is not connected to the lock unit. Or air
①
supplied to the lock unit is not adequate for
operation.
Solenoid valve connected to the lock unit does not
②
operate.
Solenoid valve for locking is energized and
③
operated, but air is not supplied from the solenoid
valve.
④ Air leakage from the manual lock release bolt.
No problems are confirmed in ① to ④ above, but
⑤
lock is not released even when air is supplied to the
lock unit.
Air piping is not connected to the cylinder or air
①
supplied to the lock unit is not adequate for cylinder
operation. (Load factor is too high)
Speed controller mounted to the cylinder is fully
②
closed.
③ Speed controller is meter-in control.
Operation speed of the cylinder is below the limit of
④
minimum speed.
Solenoid valve connected to the cylinder does not
⑤
operate.
Mounting alignment is inadequate or affected by
⑥
lateral load.
⑦ External guide of the cylinder is distorted or warped.
Manual lock is released. (Check the condition of the
①
lock release bolt)
Air of the lock unit is not exhausted.
(If the lock unit and solenoid valve for locking are
②
installed too far, it is possible that air in the piping
tube is not exhausted completely.
Solenoid valve connected to the lock unit does not
③
operate.
Connect piping to the lock unit and supply 0.3MPa or more air.
・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 state.
No problems are confirmed with above. If the solenoid valve failure is confirmed,
repair it or replace it.
Check the solenoid valve type. If the solenoid valve is normal open type which
shuts off air while the solenoid valve is energised, change it to normal close type
which supplies air while the valve is energised.
Return the manual lock release bolt to the locking status. (Air leakage may
occur if the manual lock release bolt is not returned to the correct lock position
and status)
It is possible that the inside of the lock unit is broken. Release the lock manually
and replace the lock unit.
If manual cannot be released manually, replace the product by cylinder.
(Do not disassemble or repair. Contact SMC Sales office.)
・Check the air piping of the cylinder
・Increase the operating pressure of the cylinder.
・Use a larger cylinder.
Gradually open the speed controller from the fully closed position so that the
cylinder travels full stroke smoothly at the optimum speed.
・Change it to meter-out control.
・Adjust the piston speed using a speed controller to keep the minimum
operation speed or higher.
・Remove the factor of load fluctuation.
・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.
・Align the product and make adjustment.
・ Install a guide to prevent excessive load from being applied to the cylinder.
・ Modify mounting conditions, change the support brackets.
Check the operating conditions to replace with the optimum type and size of the
guide.
Check the operating conditions to replace with the optimum type and size of the
guide.
・nstall the solenoid valve for locking close to the lock unit and shorten the piping
tube or, directly connect them.
・Install a quick exhaust valve close to the lock unit piping port.
・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.
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Countermeasures