Motor Current Display And Adjusting The Clamping Pressure - Nakanishi iSpeed3 Operation Manual

Insert a thin shim into the split in the holder and reduce the shim size in 5 μ m increments until
motor spindle is held firmly.
Tighten the clamping bolt to the torque specified for that size and type of bolt.
The final responsibility for ensuring product's stability for use in a given application is left to
the designer of the equipment in which NAKANISHI's motor spindle is installed.
NAKANISHI offers motor spindles with a wide variety of capabilities and specifications.
Please carefully check the product's specifications against the requirements of your application
and verify suitability and safety prior to initial use.
13 - 2 Fixturing a flange type motor spindle : BM 319 F/BM 319 FC, BM 320 F, BM 322 FR and BM 322 FL.
CAUTION
If the motor spindle housing diameter section is inserted and tightened using bolts or set screws, or in a solid
sleeve or a split holder arrangement, the main body will be geometrically deformed and assembly accuracy
will be compromised.
Problems such as rotation failure and heat generation will result. Absolutely never affix the motor spindle with
a bolt or set screw when using split type holders.
A flange type motor spindle is a motor spindle that installs with a factory mounted flange, without inserting a
sleeve over the motor spindle housing diameter section. This is designed to eliminate deformation/damage
of the motor spindle when performing the installation.
Insert the motor spindle housing diameter section into the machines tool plate bore.
Secure the motor spindle through the counter-sunk holes ( 2 locations) on the flange face using bolts as shown in
Motor S pindle Operation Manual Fig. 2 , Fig. 4 , Fig. 6 and Fig. 7 . Refer to table 1 and Fig. 27 .
Table 1
M 4 Bolts (M 4 x 25 )
Bolts
M 5 Bolts (M 5 x 25 )
Fastening Bolt

14 . MOTOR CURRENT DISPLAY AND ADJUSTING THE CLAMPING PRESSURE

14 - 1 MOTOR CURRENT DISPLAY
The Control Unit has a function that displays load on the motor spindle in current (x 10 mA). (Refer to
section 6 - 1 " Front face details
the Motor Spindle in fixtures.
14 - 2 Clamping the Motor Spindle
Adjust the clamping pressure level using the motor current display. Run the motor spindle at any speed and note
the current level while the motor spindle is not secured in any manner. Insert the motor spindle into the fixture
and carefully and slowly tighten. The Clamped Current Display should never be more than + 1 (+ 10 mA) of the
current load reading before clamping. This is a very important step when installing the iSpeed 3 Motor Spindle.
BM 319 F/BM 319 FC, BM 320 F
BM 322 FR, BM 322 FL
Fig. 27
). This display allows you to confirm the load/clamping level when fixing
14