REPLACING THE COLLET
8.
When installing the collet into the collet nut, be sure to fully engage the latch inside the collet nut
to the groove on the collets outer diameter area. In addition, remember that if the collet is attached
without being engaged with the latch of the collet nut, the collet cannot be removed and this may
cause damage to the collet or the spindle.
CAUTION
①
Remove the tool according to the section " 7. CHANGING THE TOOL " procedure above and remove collet nut
assembly (Fig. 7).
②
The collet and collet nut are secured by a groove in the collet and a
fl
ange in the collet nut. To remove the collet
hold the collet nut in one hand and push diagonally down on the collet. The collet should be released (Fig. 8).
③
To install the collet, hold the collet at a slight angle, and insert it into the collet nut (Fig. 9).
Press the collet in the collet nut by positioning the collet in the collet nut and pressing down on
fl
at surface (Fig. 8).
Be sure to fully engage the latch inside the collet nut into the groove on the collets outer circumference area (Fig.
10).
Latch
Collet Nut
Collet
Groove
Latch
Collet Nut
DOWN
Collet
Wrench Seat
Spindle Shaft
Loosen
Tool
Collet Nut
Fig. 7
Fig. 9
Fig. 8
Fig. 10
CONNECTION OF MOTOR CORD
9.
・
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.
CAUTION
①
Remove the Protective Cover of the Motor Cord Plug and keep it for use when not using the Motor / Spindle to
keep the connector pins safe and clean.
②
Ensure the Alignment Pin of the Motor Cord Connector is located (12 o-clock) upward.
Carefully insert the Alignment Pin of Motor Cord Plug into the Alignment Hole on the front(rear) of the
CONTROLLER and push straight.
③
Tighten the Connector Nut of the Motor Cord in a clockwise direction.
Motor Cord Side
Motor Cord Plug
Alignment Hole
Alignment Pin
Motor Spindle Side
Motor Connector
Take Out
Protective Cap
Motor Spindle Side
Motor Cord Side
Connector Nut
Tighten
Fig. 11
Fig. 12
Fig. 13
INSTALLATION OF THE MOTOR SPINDLE
10.
When installing a Motor Spindle to a fixed base, make sure the fixed base is grounded in order to avoid the risk of
an electric shock.
WARNING
・
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 ecision.
Tighten the bolt until the Motor Spindle body can not be rotated by hand within the fixture.
Extreme tightening is not necessary or recommended.
Apply working force and check that the Motor Spindle is tight before using.
CAUTION
①
When mounting a Motor Spindle, refer to the Clamping Area etched on the Motor Spindle (Fig. 14).
Model
D1
D2
EM20 - S6000
18
34
EM25 - S6000
22
30
EM30 - S6000
20
36
Table. 2
CLAMPING AREA
D2
(Recommended)
D1
Fig. 14
* When installing a EM30 - S6000, using " Grip Ring GR
- 30 (sold separately) " (Fig. 15) is recommended. If the
Grip Ring GR - 30 (sold separately) cannot be used due
to the restriction of dimension and space, and when
installing a EM25 - S6000 / EM20 - S6000, install as
shown in
②
below.
EA
Grip Ring GR-30
(Sold separately)
Fig. 15
②
When installing a Motor Spindle to the holder, recommended installation method is shown Fig. 16. Refer to "
③
How to fabricate the Split Type Holder ".
If this is not possible, install as shown in Fig. 17.
Fastening Bolt
Bushing with Slit
Slit of Bushing
Fastening Bolt
Split type Holder
Spacer
Slit
Fastening Bolt
Fig. 16
Fig. 18
Fig. 17
Do not allow set screws to come directly in contact with the Motor Spindle body as shown in Fig. 18, as
this will result in damage to the Motor Spindle housing and internal components.
When installing, never clamp directly over the bearings, as this will result in bearing damage (Refer to
Fig. 19).
CAUTION
Damage of lnternal
Components
Deformation
Bearing
Fastening Bolt
Fig. 19
Model
EM20 - S6000 EM25 - S6000 EM30 - S6000
Motor Spindle's outside diameter
φ
20
φ
25
φ
30
Table. 3
・
How to confirm the correct tightening or clamping of the Motor Spindle 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 final responsibility for ensuring holder
ʼ
s 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 Spindle with a wide variety of capabilities and specifications.
Please carefully check the Motor Spindle's specifications against the requirements of your
equipment and verify suitability and safety of the Holder prior to initial use.
CAUTION
BREAK-IN PROCEDURE
11.
During transportation, storage or installation, the grease inside the bearings will settle. If the Motor 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 4.
Table. 4
Steps
1
2
3
4
5
Rotation Speed
(min
-1
) (rpm)
15,000
30,000
40,000
50,000
60,000
Rotation Time
(min)
15
10
10
10
10
Items to Check
No Abnormal
Noises
The Motor Spindle housing temperature during the
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
spindle and motor for proper installation.
The Motor
Spindle housing
temperature
during the
break-in process
should not
exceed 20
degrees C (36
degrees F)
above ambient
temperature.
CAUTIONS WHEN USING GRINDSTONES AND TOOLS
12.
The maximum surface speed or rpm is always specified for a grindstone. Do not exceed the maximum
speed with reference to the calculating chart below. Always follow the grindstone manufacturer's
recommendations.
3.14 x Diameter (mm) x Rotation Speed (min
-1
) (rpm)
Surface Speed (m / s) =
1,000 x 60
CAUTION
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. 21. If the overhang must exceed
13mm, reduce the motor speed in accordance with Table. 5.
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 clean. If contaminants are left in the collet or collet nut, excessive run-
out will cause damage to the cutting tool and or spindle.
⑧
Do not strike or disassemble the Motor 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.
* N = Max. Operating Speed with 13mm overhang.
Overhang (mm)
Max. Speed (min
-1
) (rpm)
20
N x 0.5
25
N x 0.3
50
N x 0.1
Table. 5 Overhang and Speed
13
Fig. 21
Front View
Spacer
Slit
Fastening Bolt
Side View
Spacer
Fastening Bolt
Screw for Removal
Spacer
Fastening Bolt
Screw for Removal
Fig. 20
TROUBLESHOOTING
13.
If a problem or concern occur, please check the following items prior to consulting your dealer.
Trouble
Cause
Inspection / Corrective Action
Motor Spindle does not
rotate or rotate smoothly.
The Motor Spindle ball bearings
have been damaged.
Replace the ball bearings.
(Return to NAKANISHI dealer service.)
The motor has been damaged.
Replace the motor.
(Return to NAKANISHI dealer service.)
Overheating during
rotation.
Cutting debris has contaminated the
ball bearings, and the ball bearings
are damaged.
Replace the ball bearings.
(Return to NAKANISHI dealer service.)
Low air pressure.
Check air hose connection and air pressure.
Abnormal vibration or
noise during rotation.
The tool shank is bent.
Replace the tool.
Cutting debris has contaminated the
ball bearing.
Replace the ball bearings.
(Return to NAKANISHI dealer service.)
The Motor Spindle ball bearings
have been damaged.
Tool slippage.
Collet or collet nut are not correctly
installed.
Check and clean the collet and collet nut.
Reinstall the collet and collet nut.
The collet and the collet nut are
worn.
Replace the collet and collet nut.
High run-out.
The tool is bent.
Change the tool.
Collet nut is not correctly installed.
Secure the collet and the collet nut correctly.
The collet and the collet nut are
worn.
Replace the collet and the collet nut.
Inside of the spindle is worn.
Replace the spindle shaft.
(Return to NAKANISHI dealer service.)
Contaminants inside the collet and
the collet nut or the spindle.
Clean the collet, collet nut and the inside of the
taper and spindle.
The Motor Spindle ball bearings
have been damaged.
Replace the ball bearings.
(Return to NAKANISHI dealer service.)
Refer to the E3000 CONTROLLER Operation Manual.
DISPOSAL OF THE MOTOR SPINDLE
14.
When disposal of a Motor Spindle is necessary, follow the instructions from your local government agency for
proper disposal of industrial components.
③
How to fabricate the Split Type Holder
(1) Rough bore the inside diameter of the Split Type Holder.
(2) Cslit. (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
fi
ed torque.
(6) Finish the Split Type Holder so that the inside diameter of the Split Type Holder is Motor Spindle's
outside diameter (Refer to Table 3). The correct tolerance range for the holder is - 0.01mm to -
0.015mm and a roundness and cylindricity of less than 5
μ
m.
(7) When inserting the Motor Spindle loosen the Fastening Bolt, and tighten the Screw for Removal,
widening the Slit Area.
2021-XX-XX CACBXXXX XXXN
