
4. Dedicated Options
4 - 5
(3) Caution on installation of magnet
Observe the following cautions when installing the magnet to the spindle.
(a) Do not place an intense magnetic source near the magnet.
(b) Carefully handle the magnet, avoiding mechanical shock to the magnet.
(c) Secure the magnet to the spindle with M4 screws.
(d) After the magnet is installed, balance the entire spindle.
(e) Align the center of the magnet with the center line of the rotating disk on the spindle. (For the
position relation, refer to the maintenance instruction manual.)
(f) Keep the magnet and its peripheral clean avoiding iron particles and cutting chips from adhering
to the magnet. Failure to observe this could result in malfunction.
(g) Apply lock paint, or other suitable means, to prevent installation screws from becoming loose.
(h) If the magnet is installed on a ground rotating disk, demagnetize the disk because the rotating
disk is thought to be magnetized.
(i) Diameter of rotating disk on which the magnet is installed should be within the range from 80mm
to 120mm. If this range is exceeded, the magnet may be damaged and the orient control may
not be carried out correctly although the speed is below the tolerable speed of the magnet.
(j) If rotation speed of the spindle on which the magnet is installed exceeds 6,000r/min, use a
high-speed type magnet (applicable up to 12,000r/min of rotation speed). If rotation speed
exceeds 12,000r/min, use a ring type magnet.
(k) When installing the magnet on a rotating body plane, keep the speed below 6,000r/min.
(4) Caution on installation of sensor
Observe the following cautions when installing the sensor.
(a) The center line of head should be in line with the center of magnet.
(b) Connector used in preamplifier
BKO-C1810 : Oil proof-type
BKO-C1730 : Not oil proof-type
Install both type at a place not subject to oil.
(c) The cable between the preamplifier and the controller should be laid down apart from
high-voltage cables.
(d) Check the connector wiring, securely engage the receptacle and tighten connector lock screws.
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