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10. Troubleshooting
If any trouble should be found, check the following points:
(1)
No vibration at all
In this case, distinguish the trouble between mechanical system and electric system as shown below for
checking. Insert an iron piece to the magnet clearance as shown below with power switch turned on.
[1] When the piece is sucked in strongly
(including small vibration)
Electric system is normal. Accordingly, it is due to
either that setting frequency of the controller is
not appropriate or that problems such as setting of
number of body leaf springs exist.
[2] When the piece is not sucked in at all
Trouble of electric system including controller and magnet. However, for the controller with sensor,
remove works since such a condition that the detection head is detecting works is considered. Moreover,
when the sensor is detecting error, recheck such as optical axis setting and proximity distance.
Further, check the following points for electric system for safety:
a)
Power supply is connected properly. (See the item 7 "Wiring and Operating Methods".)
b)
Fuse of controller is not melted, and overcurrent protection function is not active.
c)
External control input terminal of controller is connected correctly as well as correct setting.
(For details, refer to the Controller Operation Manual.)
d)
Magnet coil is not broken.
(2)
Vibration is found,
although amplitude
is insufficient.
[1] Imperfect power source (such as 100 V connection in spite of 200 V
specification.)
[2] Leaf spring mounting bolt is not loosened.
[3] Tightening bolt of chute etc. is not loosened.
[4] Magnet clearance is not too large.
[5] Omission of removal of fixtures used for transportation
[6] Too heavy chute mass
[7] Improper number of leaf springs to the mass of the chute
[8]
Foreign matter is not pinched in space between the chutes
(3) Amplitude
is
decreasing during
use.
[1] Leaf spring is not fatigued.
[2] Leaf spring mounting bolt is not loosened.
[3] Leaf spring is not damaged, and rust is not found.
[4] Foreign substance is not pinched in the magnet clearance.
[5] Chute tightening bolt is not loosened.
(4) Unusual
metallic
noise
[1] Magnet clearance is not so small as to allow contact in vibration.
[2] Inclusion of foreign matter in space between chutes
[3] Excessive
amplitude
[4] Omission of removal of fixtures used for transportation
[5] Deformed cover interfering with vibrator
When you inform NTN of trouble condition with unknown cause, let them know the detail as far as
possible with reference to the above so that they can take a measure as soon as possible.
Scale made of iron, etc.
Magnet clearance
Magnet
Moving iron core