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[5] Replacement of leaf spring
100% replacement of leaf springs is recommended with the guideline of 1-year operation on the
basis of 8 hours a day.
If amplitude cannot be recovered after correction of set in fatigue described in [4] above, we
recommend that you replace all leaf springs, considering that the end of the life of the leaf spring has
been reached.
(Note)
When a leaf spring is needed newly, purchase one referring to the leaf spring product
number in item 11 "Specifications".
(3)
Check and adjustment of magnet clearance
Clearance between the magnet and moving iron core is set to those described in the table below in shipment
of the machine from NTN. It is recommended to make it as small as possible to the extent where they are
not in contact in the maximum amplitude, therefore check it from time to time and maintain an appropriate
value.
<Adjusting procedure>
[1] Remove the cover. (Allowed only on single side)
[2] Loosen the moving iron core tightening bolt.
[3] Insert a clearance gauge of the specified dimensions for each body (shown in the follwing table) into
the magnet clearance, push the moving iron core toward the magnet side, and temporarily tighten the
moving iron core locking bolt.
[4] Tighten the moving iron core locking bolt. At that time, take care so that the moving iron core position
set in the Step [3] may not deviate.
[5] Pull out the clearance gauge. Check the parallelism to and clearance in the magnet.
[6] Fit the cover.
Magnet clearance (mm)
Model/Drive system
In shipment
Maximum
MD10 (Full wave)
1.0
MD20 (Full wave)
1.0
MD30 (Half wave)
2.0
CAUTION
When the magnet clearance is set more than 20% exceeding the maximum value
above in use, the magnet may be burnt. Check the magnet clearance from time to
time and maintain an appropriate value.
Magnet clearance
Magnet
Moving iron core