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9.
CONNECTION OF MOTOR CORD
CAUTION
・ Before connecting to the Motor Cord to the Motor and CONTROLLER, verify the Main Power
Switch in the CONTROLLER is turned OFF. If the Main Power Switch on the CONTROLLER is ON
while connecting the Motor Cord, damage to the CONTROLLER is possible.
・ Install the Protective Cap etc. to prevent damage or contamination to the Motor Cord Plug when
not in use.
① Remove the Protective Cap of the Motor
Take Out
Cord.
② Carefully insert the alignment pin into
Alignment Pin
the alignment hole and push straight into
Connector
the Connector of the Motor Cord.
Motor Spindle side
③ Tighten the Connector Nut with
clockwise.
Connector Nut
④ Remove the protective air inlet Quick
Disconnect Cover.
Take Out
⑤ Insert the provided air hose.
10.
INSTALLATION OF THE MOTOR SPINDLE
WARNING
When installing a Motor Spindle to a ¿xed base, make sure the ¿xed base is grounded in order to avoid
the risk of an electric shock.
CAUTION
・ When installing a Motor Spindle, do not hit, drop or cause shock to the Motor Spindle. This may
cause damage to internal components and result in malfunctions.
・ When mounting the Motor Spindle, be sure to secure within Clamping Area etched on the Motor
Spindle O.D. If the Motor Spindle is installed incorrectly, damage to the internal components is
possible.
・ Cautions when tightening the securing bolts on to a Split Type Holder
Do not over-tighten the bolt. This will cause damage to Motor Spindle's precision.
Tighten the bolt until the Motor Spindle body can not be rotated by hand within the ¿xture.
Extreme tightening is not necessary or recommended.
Apply working force and check that the Motor Spindle is tight before using.
① When mounting a Motor Spindle, refer to the Clamping Area etched on the Motor Spindle (Fig. 13).
20
45
(Clamping Area)
CLAMPING AREA
Fig. 13
* When installing the Motor Spindle, it is recommended to use a " GR - 30 Grip Ring (sold separately (Fig. 14)) ".
If the GR - 30 Grip Ring cannot be used due to the restriction of dimension and space, install as shown in ②
below.
Grip Ring (Sold Separately)
CLAMPING AR EA
Fig. 14
② When installing a Motor Spindle to the holder, recommended installation method is shown Fig. 15. Refer to " ③
How to fabricate the Split Type Holder ".
If this is not possible, install as shown in Fig. 16.
Protective Cap
Fig. 8
Alignment Hole
Connector
Motor Cord side
CAUTION
Fig. 9
Do not allow set screws to come directly
in contact with the Motor Spindle body
Tighten
as shown in Fig. 17, as this will result in
damage to the Motor Spindle housing and
internal components.
When installing, never clamp directly over
Fig. 10
the bearings, as this will result in bearing
damage (Refer to Fig. 18).
Push
Fig. 11
Insert
① How to fabricate the Split Type Holder
Fig. 12
(1) Rough bore the inside diameter of the
Split Type Holder.
(2) Cut a slit. (Ex. Slit 2mm) wide.
(3) Tighten the Screw for Removal and Force
Open the Slit Area.
(4) Insert a spacer (Ex. thickness = 2mm)
into the Slit Area.
(5) Loosen the Screw for Removal, and
tighten the fastening bolt with its speci¿ed
torque.
(6) Finish the Split Type Holder so that the
inside diameter of the Split Type Holder is
30 with its tolerance range from
- 0.01mm to - 0.015mm, and its roundness
and cylindricity of less than 5μm.
(7) When inserting the Motor Spindle loosen
the Fastening Bolt, and tighten the Screw
for Removal, widening the Slit Area.
CAUTION
・ How to con¿rm the correct tightening or clamping of the Motor Spindles in the holder
Measure the current value of the CONTROLLER's power cord by the clamp meter.
Fasten the holder so that the increase in the no-load current value (during rotation at the maximum
rotation speed) with the Motor Spindle fastened is 20mA (for type 120V) / 10mA (for type 200V / 230V)
or less, compared to the no-load current value (during rotation at the maximum rotation speed)
without fastening the Motor Spindle. Do not over-tighten the Fastening Bolt. It may damage Motor
Spindle's precision and shorten the life of the bearings.
・ The ¿nal responsibility for ensuring holderʼs safety 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 speci¿cations.
Please carefully check the Motor Spindle's speci¿cations against the requirements of your
equipment and verify suitability and safety of the Holder prior to initial use.
11.
BREAK-IN PROCEDURE
During transportation, storage or installation, the grease inside the bearings will settle. If the spindle is suddenly run
at high-speed, the grease will be ejected from the bearings, causing excessive heat that will cause bearing damage.
After installation, repair, initial operation, or long periods of non operation, please follow the break-in procedure
detailed in Table. 2.
Table. 2
Steps
Rotation Speed
(min
-1
) (rpm)
Rotation Time
(min)
Items to Check
Slit of Bushing
Fastening Bolt
Fastening Bolt
Fastening Bolt
Slit
Spacer
Split Type Holder
Bushing with Slit
Fig. 15
Fig. 16
Fig. 17
Deformation
Damage of Internal
Fastening Bolt
Components
Bearing
Fig. 18
Screw for Removal
Fastenig Bolt
Fastenig Bolt
Slit
Spacer
Front View
Fig. 19
1
2
3
4
15,000
30,000
40,000
50,000
15
10
10
10
No Abnormal
The Motor Spindle housing temperature during the
Noises.
break-in process should not exceed 20 degrees C
(36 degrees F) above ambient temperature. Should
the Motor Spindle exceed this limit, rest the Motor
Spindle for at least 20 minutes and re-start the break
in procedure from the beginning. If the housing
temperature rises again and exceeds 20 degrees C
(36 degrees F) above ambient temperature, check the
Motor Spindle for proper installation.
12.
CAUTIONS WHEN USING GRINDSTONES AND TOOLS
CAUTION
The maximum surface speed or rpm is always speci¿ed for a grindstone. Do not exceed the maximum
speed with reference to the calculating chart below. Always follow the grindstone manufacturer's
recommendations.
Surface Speed (m / s) =
① The proper surface speed for general grindstones is 10 - 30m / s.
② Do not exceed 13mm of overhang for mounted grindstones as shown in Fig. 20. If the overhang must exceed
13mm, reduce the motor speed in accordance with Table. 3.
③ Dress the grindstone prior to use.
④ Do not use cutting tools with bent or broken shanks, cracks or excessive run-out.
⑤ For grinding, the maximum depth of cut should not exceed 0.01mm radially or axially. Reciprocate the tool
several times after each pass to eliminate tool pressure.
⑥ Always operate cutting tools within the allowable recommended speed of the cutting tools. Use of a cutting
tool outside of the allowable speed of the cutting tools could cause damage to the spindle and injury to the
operator.
⑦ Keep the cutting tool shank and collet chuck clean. If contaminants are left in the collet chuck or chuck nut,
excessive run-out will cause damage to the cutting tool and or spindle.
⑧ Do not strike or disassemble the spindle.
⑨ Please set the cutting tools to minimize the overhang amount. 13mm is the maximum amount of overhang to
maintain high accuracy and safety.
Fastening Bolt
Table. 3 Overhang and Speed
Overhang (mm)
Max. Speed (min
20
25
50
* N = Max. Operating Speed with 13mm overhang.
13.
TROUBLESHOOTING
If a problem or concern occur, please check the following items prior to consulting your dealer.
Trouble
Motor Spindle does not
The Motor Spindle ball bearings have
rotate or rotate smoothly.
been damaged.
The motor has been damaged.
Overheating during
Cutting debris has contaminated the
Spacer
rotation.
ball bearings, and the ball bearings
are damaged.
Screw for Removal
Low air pressure.
Fastenig Bolt
Abnormal vibration or
The tool shank is bent.
noise during rotation.
Cutting debris has contaminated the
Spacer
ball bearing.
The Motor Spindle ball bearings have
been damaged.
Tool slippage.
Collet chuck or chuck nut are not
correctly installed.
Side View
The collet chuck and the chuck nut
are worn.
High run-out.
The tool is bent.
Chuck nut is not correctly installed.
The collet chuck and the chuck nut
are worn.
Inside of the spindle is worn.
Contaminants inside the collet chuck
and the chuck nut or the spindle.
The Motor Spindle ball bearings have
been damaged.
Refer to the E3000 CONTROLLER Operation Manual.
14.
DISPOSAL OF THE MOTOR SPINDLE
When disposal of a Motor Spindle is necessary, follow the instructions from your local government agency for
proper disposal of industrial components.
5
60,000
10
The Motor
Spindle housing
temperature
during the break-
in process should
not exceed
20 degrees C
(36 degrees F)
above ambient
Contents are subject to change without notice.
temperature.
3.14 x Diameter (mm) x Rotation Speed (min
-1
) (rpm)
1,000 x 60
-1
) (rpm)
N x 0.5
N x 0.3
N x 0.1
13
Fig. 20
Cause
Inspection / Corrective Action
Replace the ball bearings.
(Return to NAKANISHI dealer service.)
Replace the motor.
(Return to NAKANISHI dealer service.)
Replace the ball bearings.
(Return to NAKANISHI dealer service.)
Check air hose connection and air pressure.
Replace the tool.
Replace the ball bearings.
(Return to NAKANISHI dealer service.)
Check and clean the collet chuck and chuck
nut. Reinstall the collet chuck and chuck nut.
Replace the collet chuck and chuck nut.
Change the tool.
Secure the collet chuck and the chuck nut
correctly.
Replace the collet chuck and the chuck nut.
Replace the spindle shaft.
(Return to NAKANISHI dealer service.)
Clean the collet chuck, chuck nut and the
inside of the taper and spindle.
Replace the ball bearings.
(Return to NAKANISHI dealer service.)
2014.09.20 003
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