
B–65162E/03
12. DETECTORS FOR THE SPINDLE
557
(5) Mounting the High–resolution Magnetic Pulse Coder
The high–resolution magnetic pulse coder is mounted on the rotation axis
of the spindle on the motor power line side. If the high–resolution
magnetic pulse coder is mounted incorrectly, the motor cannot be
controlled correctly. Mount the high–resolution magnetic pulse coder
correctly. In addition, mount a cover or attach a sheet to protect against
the ingress of foreign matter.
1 Mounting a magnetic drum
Sensor A860–0382–T121
A860–0382–T122
A860–0382–T123
A860–0382–T124
Mounting a drum
Mount the drum by shrink fitting the drum or ex-
pansion fitting the sleeve. For information
about the fitting allowance for each speed, see
Item (5).5.
Secure the drum by installing screws in the 6–
5.5 holes on the drum. Until centering is com-
pleted, to not tighten the screws fully.
Drum mounting direction
Mount the drum so that the reference surface of the drum faces the nose of the spindle. The
reference surface of the drum is on the opposite side to the surface on which Z is printed.
NOTE
– Use a magnetic material for the motor housing to minimize magnetic leakage from the motor.
– Ensure that the motor housing is at least 15 mm thick at the sensor mounting section.
– After assembling the drum with the sleeve, mount the drum onto the spindle. Use a
configuration where the sleeve holds the drum on the motor side (left side in the figure above).
If this configuration is impossible, use a non–magnetic material (such as stainless steel) for the
sleeve.
– If a magnetic substance is placed at the back of the magnetic drum (on the right side in the figure
above), allow a clearance of 30 mm.