Nakanishi EM20-S6000 User manual

Motor Spindle
OPERATION MANUAL
Thank you for purchasing Motor Spindle " EM20 - S6000・EM25 - S6000・EM30 - S6000 ". These Motor Spindles
are designed for grinding, small diameter drilling and milling, etc. The E3000 CONTROLLER and Air Line Kit are
required to drive this Motor Spindle. Read this and all the associated component Operation Manuals carefully
before use. Always keep this Operation Manual in a place where a user can referred to for reference at any time.
E M 20 - S6000・E M 25 - S6000
E M 30 - S6000
■Read these warnings and cautions carefully and only use in the manner intended.
■These warnings and cautions are intended to avoid potential hazards that could result in personal injury to the
operator or damage to the device. These are classified as follows in accordance with the seriousness of the risk.
Class Degree of Risk
WARNING A safety hazard could result in bodily injury or damage to the
device if the safety instructions are not properly followed.
CAUTION A hazard that could result in light or moderate bodily injury or
damage to the device if the safety instructions are not followed.
CAUTIONS FOR HANDLING AND OPERATION
1.
WARNING
①This Motor Spindle is not a hand tool. It is designed to be used on CNC machines or special
purpose machines.
②Do not touch the cutting tool while it is running. It is very dangerous.
③Wear safety glasses, dust mask, and use a protective cover around the Motor Spindle whenever
the Motor Spindle is rotating.
④Never connect, disconnect or touch the Power Cord Plug or Motor Cord Plug with wet hands. This
may cause an electric shock.
⑤Never operate or handle the Motor Spindle until you have thoroughly read the Operation Manuals
and safe operation has been confirmed.
1）To prevent injuries / damages, check the Motor Spindle and cutting tool for proper installation,
before operating the Motor Spindle.
2）Before disconnecting the Motor Spindle, always turn the control power offand turn the
compressed air supply to the CONTROLLER off. Then it is safe to remove the Motor Spindle.
⑥Whenever installing a Motor Spindle to a fixed metal base, ensure that the fixed metal base is
grounded in order to avoid risk of an electric shock.
⑦When installing a tool, tighten the collet correctly and check again the collet and collet nut before
use. Do not over-tighten the collet. This may cause damage to the spindle.
⑧Do not use bent, broken, chipped, out of round or sub-standard tools, as this may cause them to
shatter or explode. Tools with fractures or a bent shank will cause injury to the operator. When
using a new tool, rotate it in a low speed and increase speed gradually for safety.
⑨Do not exceed the maximum recommended allowable tool speed. For your safety, use speeds
below the maximum allowable speed.
⑩Do not apply excessive force. This may cause injury to the operator by slippage or damage of the
tool, or loss of concentricity and precision of the Motor Spindle.
①Do not drop or hit this Motor Spindle, as shock can damage to the internal components.
②Be sure to clean the collet and collet nut, the inside of the spindle before replacing the tool. If
ground particles or metal chips stick to the inside of spindle or the collet, damage to the collet or
spindle can occur due to the loss of precision.
③When cleaning a Motor Spindle, stop the Motor Spindle and remove debris with a soft brush or a
cloth. Do not blow air into the dust proof cover area (refer to section " 6 - 2 Outside View ") with
compressed air as foreign particles or cutting debris may get into the ball bearing.
④Always clean the tool shank before installing the tool in the spindle.
⑤When sizing the correct collet size to the tool shank diameter, a tolerance of +0 〜
-
0.01mm is
strongly recommended.
A tool shank within the +0 〜
-
0.1mm range is mountable, however, this may cause poor
concentricity and or insufficient tool shank gripping force.
⑥Select suitable products or tools for all applications. Do not exceed the capabilities of the
Motor Spindle or tools.
⑦Do not stop the supply cooling air for Motor Spindle during operation of the machine.
Removing the air pressure from the Motor Spindle causes a loss of purging, allowing the Motor
Spindle to ingest coolant. This will cause damage to the Motor Spindle.
⑧Carefully direct coolant spray to the tool. Do not spray directly on the Motor Spindle body. If large
amount spray directly on the Motor Spindle, it may cause excess load of the motor rotation with
loss of durability to the Motor Spindle.
⑨Stop working immediately when abnormal rotation or unusual vibration are observed. Immediately,
please check the content of section " 13. TROUBLESHOOTING ".
⑩Always check if the tool, collet, collet nut, connection hose and supply air / oil hose for damaged
before and after operating.
⑪If the collet or collet nut show signs of wear or damage, replace them before a malfunction or
additional damage occurs.
⑫After installation, repair, initial operation, or long periods of non operation, please refer to section
" 11. BREAK-IN PROCEDURE " detailed in Table. 4. When checking the Motor Spindle, no vibration
or unusual sound should be observed during rotation.
⑬Do not disassemble, modify or attempt to repair this Motor Spindle. Additional damage will occur
to the internal components. Service must be performed by NSK NAKANISHI or an authorized
service center.
⑭When using this Motor Spindle for mass production, please consider the purchase of an additional
Motor Spindle to be used as a back-up in case of emergency.
⑮Securely connect the compressor supply connection hose and the air hose to the Air Line Kit and
the Motor Spindle to avoid accidental disconnection during use.
CAUTION
BASIC PACKAGE
2.
When opening the package, check if it includes all items listed in " Table. 1 Packing List Contents ".
In the event of any shortage, please contact either NAKANISHI (see the " 4. CONTACT US " section) or your local
dealer.
Table. 1 Packing List Contents
Common
Motor Spindle・・1pc. Inspection Card・・1pc.
検査成績表
Inspection Card
Operation Manual・・1set
取扱説明書
OPERATION MANUAL
EM20 - S6000 / EM25 - S6000
Collet Nut (CHN - A)・・1pc.*
Wrench (8 x 5), (9 x 11)・・1pc. Each.
5
8
11
9
EM30 - S6000
Collet Nut (K - 265)・・1pc.* Wrench (12 x 14)・・2pcs.
12
14
* The collet nut is attached to the Motor Spindle.
WARRANTY3.
We provide a limited warranty for our products. We will repair or replace the products if the cause of failure is due to
the following manufactures defects. Please contact us or your local distributor for details.
(1) Defect in manufacturing.
(2) Any shortage of components in the package.
(3) Where damaged components are found when initially opening the package.
(This shall not apply if the damage was caused by the negligence of a customer.)
CONTACT US4.
For your safety and convenience when purchasing our products, we welcome your questions.
If you have any questions about operation, maintenance and repair of the product, please contact us.
Company Name
Business Hours
U.S. Toll Free No.
Telephone No.
Fax No.
Website
:
Industrial Div.
: 8:00 to 17:00 (CST)
(closed Saturday, Sunday and Public Holidays)
: [phone]
: [phone]
: [phone]
: www.nskamericacorp.com
Contact UsContact Us
For U.S. Market
Company Name
Business Hours
Telephone No.
e-mail
:
: 8:00 to 17:00 (JST)
(closed Saturday, Sunday and Public Holidays)
: [phone]
: [email protected]
For Other Markets
FEATURES5.
①The Motor Spindle housing is made from precision ground, hardened, stainless steel (SUS) with an outside
diameter of φ20mm, φ25mm and φ30mm.
②Excellent durability and high reliability are obtained by using a high-speed brushless motor, which eliminates
the need for brush replacement and frequent maintenance.
③Easy to be attached to NC lathe or to replace the Motor Spindle, because the connector is placed at the edge
of the motor.
④Various sizes of collets are available CHA 0.5mm - 4.0mm or CHK 0.5mm - 6.0mm.
Standard collet is 3.0mm (CHA / CHK) or 3.175mm (CHA / CHK). (For U.S. market 3.175mm (CHA / CHK)).
SPECIFICATIONS AND DIMENSIONS6.
Temperature Humidity Atmospheric Pressure
Operation Environment 0 - 40°C MAX.75%
(No condensation)
800 - 1,060hPa
Transportation and Storage
Environment
-10 - + 50°C 10 - 85%500 - 1,060hPa
<Option>
Motor Cord *Note 1 Length : 4m, 6m, 8m
(The Air Hose ( φ4mm) of the same length is attached.)
Collet (CHA - □□ ) *Note 2
(EM20 - S6000 / EM25 - S6000）
φ0.5mm - φ4.0mm in 0.1mm increments and φ2.35mm, φ3.175mm
Collet (CHK - □□ ) *Note 2
(EM30 - S6000)
φ0.5mm - φ6.0mm in 0.1mm increments and φ2.35mm, φ3.175mm,
φ4.76mm, φ6.35mm
6 - 1 Specifications
*Note1 ：Motor Cord is sold separately. Please select the suitable motor cord length for your application.
*Note2 ：Collet is sold separately. Please select the suitable collet size for your application.
6 - 2 Outside View
①EM20 - S6000
③EM30 - S6000
②EM25 - S6000
Fig. 1
Fig. 2
Fig. 3
(8.3)
(156)
133
(75)58
(14.7)
11.5
φ20
-0.01
0
φ20
-0.02
-0.01
φ11.8
Dust Proof Cover Area
-0.01
0
φ11.8
φ25 φ25 -0.02
-0.01
(162.5)
(8.3)
(75.5)
139.5
64
(14.7)
11.5
Dust Proof Cover Area
(175.2)
(8.3)
(81.5)
149.5
68
(17.4)
12.5
Dust Proof Cover Area
φ15.9
φ
30
-0.01
0
φ30
-0.02 -0.01
6 - 3 Torque Characteristics
①EM20 - S6000 / EM25 - S6000
②EM30 - S6000
Fig. 4
Fig. 5
9
8
7
6
5
4
3
2
1
0 10 20 30 40 50 60
450
400
350
300
250
200
150
100
50
0
Output (W)
Speed (x 103min-1)(rpm)
Torque (cN·m)
Continuous Duty Area
Torque
Output
9
8
7
6
5
4
3
2
1
010 20 30 40 50 60
450
400
350
300
250
200
150
100
50
0
Continuous Duty Area
Output (W )
Speed (x103min-1)(rpm)
Torque (cN·m)
Output
Torque
CHANGING THE TOOL7.
Please set the cutting tools to minimize the overhang amount. 13mm is the maximum amount of
overhang to maintain high accuracy and safety.
RECOMMENDATION
Do not tighten the collet without inserting a tool or dummy bur, as this will damage the collet, spindle
or collet nut, causing difficulty removing the collet.
CAUTION
①Set the provided wrench (EM20 - S6000 / EM25 - S6000：8mm, EM30 - S6000：12mm) on the spindle.
②Place the provided wrench (EM20 - S6000 / EM25 - S6000：11mm, EM30 - S6000：14mm) on the collet nut
and turn it counterclockwise to loosen the collet and remove the tool (The first turn will loosen the collet nut, but
thetool will not release and turning will become stiff. Keep turning through the stiffness and the collet will open).
③Clean the collet and collet nut, then insert the new tool and tighten the collet by turning clockwise. Do not
overtighten.
Collet Nut
Tool
Spindle Shaft
Loosen
Tighten
Fig. 6
Model EM20 - S6000 EM25 - S6000 EM30 - S6000
Maximum Motor Rotation Speed 60,000min-1 (rpm)
Spindle Accuracy Less than 1μm
Outside diameter φ20mm φ25mm φ30mm
Max. Output 250W 350W
Weight 230g 375g 575g
Noise Level at 1m distance Less than 70dB (A)
OM-KK0951EN 000

REPLACING THE COLLET8.
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
①Remove the tool according to the section " 7. CHANGING THE TOOL " procedure above and remove collet nut
assembly (Fig. 7).
②The collet and collet nut are secured by a groove in the collet and a flange 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).
③To 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 flat 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 CORD9.
・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
①Remove 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.
②Ensure 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.
③Tighten the Connector Nut of the Motor Cord in a clockwise direction.
Motor Cord Side
Motor Cord PlugAlignment HoleAlignment 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 SPINDLE10.
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
①When 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 ②below.
EA
Grip Ring GR-30
(Sold separately)
Fig. 15
②When 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. 18Fig. 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 φ20 φ25 φ30
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 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 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 TOOLS12.
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
①The proper surface speed for general grindstones is 10 - 30m / s.
②Do 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.
③Dress the grindstone prior to use.
④Do not use cutting tools with bent or broken shanks, cracks or excessive run-out.
⑤For 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.
⑥Always 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.
⑦Keep 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.
⑧Do not strike or disassemble the Motor Spindle.
⑨Please 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
TROUBLESHOOTING13.
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 SPINDLE14.
When disposal of a Motor Spindle is necessary, follow the instructions from your local government agency for
proper disposal of industrial components.
③How 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 specified 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 5μm.
(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