NAKANISHI OM-K0994MA000 iSpeed3 Motor Spindle Instruction Manual

Collet (CHA- □□ ) Note1| φ0.5 – φ4.0mm in 0.1mm increments and φ2.35mm, φ3.175mm.
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Motor Cord| Note2| EMCD- BM3 – □ M| Motor Cord Length : 3m, 5m and 7m.
(The Air Hose (φ4mm) of the same length is attached.)
EMCD- BM3S – □ M(Straight Type)| Motor Cord Length : 4m, 6m and 8m.
(The Air Hose (φ4mm) of the same length is attached.)
EMCD- BM3A – □ M(Angle Type)

Note1：Collet is sold separately. Please select the suitable collet size for your application.
Note2：Motor Cord is sold separately. Please select the suitable motor cord length for your application.
6 – 2 Outside View

※ Dust Proof Cover Area. Applicable Motor Cord : EMCD-BM3- □ M

Applicable Motor Cord : EMCD-BM3S- □ M (Straight Type) EMCD-BM3A- □ M (Angle Type) ※ Dust Proof Cover Area.

6 – 3 Torque Characteristics

CHANGING THE TOOL

CAUTION
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.

1. Set the provided 8mm wrench on the spindle.

2. Place the provided 11mm wrench 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 the tool will not release and turning will become stiff. Keep turning through the stiffness and the collet will open.)

3. Clean the collet and collet nut, then insert the new tool and tighten the collet by turning clockwise. Do not over tighten.

REPLACING THE COLLET

CAUTION
When installing the collet in the collet nut, make sure to fully engage the latch inside the collet nut to the groove on the collet outer circumference 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.

1. Remove the tool according to the section 7. “CHANGING THE TOOL” procedure above and remove collet nut assembly (Fig. 16).
2. The 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. 17).
3. To install the collet, hold the collet at a slight angle, and insert it into the collet nut (Fig. 18).
   Press the collet in the collet nut by positioning the collet in the collet nut and pressing down on flat surface (Fig. 17).
   Be sure to fully engage the latch inside the collet nut into the groove on the collet outer circumference area (Fig. 19).

CONNECTION OF MOTOR CORD AND AIR SUPPLY

9 – 1 Connection of the Motor Cord
CAUTION

• Before connecting to the Motor Cord Plug, make sure the Main Power Switch on the CONTROLLER is turned OFF. If the Main Power Switch on the CONTROLLER is ON while connecting the Motor Cord Plug, damage may cause to the CONTROLLER.
• Install the connector cover (protective cap etc.) to prevent damage or contamination to the Motor Cord Plug when not in use.

9 – 1 – 1 Connection of the Motor Cord <EMCD-BM3- □M>
The following instructions are for the spindles listed below only:
(BM-319 / BM-319F / BM-319FC / BM-320 / BM-320F / BM-322 / BM-322FR / BM-322FL / BM-322FS）

1. Remove the Protective Cover of the Motor Cord.
2. Ensure Alignment pin upward. Carefully insert the Alignment pin into the Alignment hole and push straight into the motor connector of the Motor Cord Side.
3. Tighten the Coupling Nut.
4. Remove the protective air inlet quick disconnect cover.
5. Insert the provided air hose.

9 – 1 – 2 Connection of the Motor Cord <EMCD-BM3S- □ M / EMCD-BM3A- □ M>
The following instructions are for the spindles listed below only:
(BMJ-319 / BMF-319 / BMJ-320 / BMJ-322)

1. Remove the Protective Cover of the Motor Cord.
2. Ensure alignment pin on the motor is positioned downward. Carefully insert the alignment pin on the motor cord into the alignment hole and push straight into the motor connector.
3. Tighten the Motor Cord Nut.

9 – 2 Air Supply
The air pressure requirement varies with the number of the motor connections and the length of the hose (quick disconnect cord and motor cord). Verify the number of spindles and cable length before setting the pressure according to Table 1.
CAUTION

• For BM-319 / BM-319F / BM-319FC / BM-320 / BM-320F / BM-322 / BM-322FR / BM-322FL / BM-322FS “Hose Length” indicates total hose length consisting of the Quick Disconnect Hose and the motor cord hose. See Fig 27 to see how to calculate “Hose Length”.
• When connecting the two motor spindles to the Controller, use the air hose branching joint provided (” Y ” Type) provided with the CONTROLLER. Insert the branching joint into the Air Out quick disconnect on the CONTROLLER.
  (Common for all motor spindle models.)

Table 2.

*Note 1： “Hose Length” indicates total hose length consisting of the Quick Disconnect Hose and the Motor Cord Hose. See Fig.28 to see how to calculate “Hose Length”.

INSTALLATION OF THE MOTOR SPINDLE

WARNING
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.
CAUTION
When installing a motor spindle, do not hit, drop or cause shock to the spindle. This may cause damage to internal components and result in malfunctions.
10 – 1 Mounting a straight type motor spindle
The following instructions are for the spindles listed below only:
(BM-319 / BMJ-319 / BM-320 / BMJ-320 / BM-322 / BMJ-322)
CAUTION

• When mounting the motor spindle, be sure to mounting within clamping area etched on the spindle. If the motor spindle is installed incorrectly, this will cause and damage to the motor spindle.
• Cautions when tightening the securing bolt of the Split Type Holder.
  Do not over tighten the bolt. This may cause damage to motor spindle’s precision. Tighten the bolt until the spindle body can not be turned 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.

1. When mounting a motor spindle, refer to the Clamping Area etched on the motor spindle. (Fig. 29, 30)

2. When installing a motor spindle to the holder, recommended installation method is shown Fig 31. Refer to ”
   How to fabricate the Split Type Holder “. If this is not possible, install as shown in Fig. 32 using the Controllers X10mA function to avoid crushing the motor spindle. CAUTION Do not allow set screws to come directly in contact with the spindle body as shown in Fig. 33, as this will result in damage to the spindle housing and internal components. When installing, never clamp directly over the bearings, as this will result in bearing damage (Refer to Fig. 34).

3. How to fabricate the Split Type Holder
   (1) Roughly process (carve) the inside diameter of the Split Type Holder.
   (2) Cut a slit. (Ex. Slit 2mm)
   (3) Twist the Screw for Removal and Broaden the Slit Area.
   (4) Insert spacer (ex t = 2mm) into the Slit Area.
   (5) Loosen the Screw for Removal, and tighten the Fastening Bolt with the specified torque.
   (6) Finish machining the Split Type Holder so that the inside diameter of the Split Type Holder is motor spindle’s outside diameter depending on the i-Speed3 motor / spindle model (Refer to Table 2).
   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 twist the Screw for Removal, and broaden the Slit Area. Table 3.**** Model| BM-319 / BMJ-319| BM- 320 / BMJ- 320| BM-322 / BMJ- 322
   ---|---|---|---
   φD| φ19.05| φ20| φ22

CAUTION
The final responsibility for ensuring holder’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 spindles 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.

4. Motor current display and adjusting the clamping pressure
   (1) Motor current display
   The Control Unit has a function that displays load on the motor spindle in current (x10mA). (Refer to Front face details ⑩ of the iSpeed3 CONTROLLER Operation Manual). This display allows you to confirm the load / clamping level when fixing the Motor Spindle in fixtures.
   (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 (+10mA) of the current load reading before clamping. This is a very important step when installing the iSpeed3 Motor Spindle.

10 – 2 Fixturing a flange type motor spindle
The following instructions are for the spindles listed below only:
(BM-319F / BM-319FC / BM-320F / BM-322FR / BM-322FL / BM-322FS / BMF-319)
CAUTION
If the motor spindle housing diameter section is inserted and tightened using bolts and 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 may result.
A Flange Type motor spindle can be installed with a flange, without fastening a sleeve over the housing diameter section. This is designed to eliminate deformation / damage of the motor spindle when performing the installation.

1. Insert the flange type motor spindle housing diameter area into the fixed base holder of the machine.

2. Secure the motor spindle through the counter-sunk holes on the flange using bolts as shown in Fig. 8, Fig. 9, Fig. 10 and Fig. 11.
   Refer to table 4 and Fig. 36 (For BM-319F / BM-319FC / BM- 320F / BM-322FR / BM-322FL / BM-322FS).

3. Secure the motor spindle through the counter-sunk holes (2 locations : Ⓐ and Ⓓ / Ⓑ and Ⓒ ) on the flange using bolts as shown in Fig. 14. Refer to table 4 and Fig. 37 (For BMF-319).

Table 4.

< Option>

• Spacer (10mm)
  By using this spacer between the back of the flange and the front the machine’s tool block, it is possible to extend the cutting tool edge forward 10mm (For BM-322FR, BM-322FL).Model| SP- 22 × 10L
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• Split Bushings
  Bushings allow a φ 22mm BM-322, BMJ-322, BM-322FR, BM322FL, BM-322FS to be mounted into larger diameters. φ 25mm or φ 25.4mm holders.

BREAK-IN PROCEDURE

During transportation, storage or installation the grease inside the bearings will settle. If the spindle is suddenly run at high-speed excessive heat will cause bearing damage. After installation, repair, initial operation, or long periods of non operation please follow the break-in procedure detailed in Table 5.
Table 5.

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.| The 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 CUTTING TOOLS

CAUTION
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 manufacturers’ recommendations.

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. 40. If the overhang must exceed 13mm, reduce the motor speed in accordance with table 6.
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 tools within the allowable recommended speed of the tools. Use of a tool outside of the allowable speed of the tools could cause damage to the spindle and injury to the operator.
7. Keep the tool shank and collet clean. If contaminants are left in the collet or collet nut, excessive run-out will cause damage to the tool and or spindle.
8. Do not strike or disassemble the motor spindle.
9. Please set the tools to minimize the overhang amount. 13mm is the maximum amount of overhang to maintain high accuracy and safety.

Table 6. Overhang and Speed

N = Max. Operating Speed with 13mm overhang.

TROUBLE SHOOTING

If a problem or concern occurs, please check the following prior to consulting your dealer.

Replace the ball bearings.
(Return to NAKANISHI dealer service.)
Motor is broken.| Replace the motor.
(Return to NAKANISHI dealer service.)
Overheating during rotation.| Cutting debris has contaminated the ball bearing, and the ball bearing is 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.| Using bent tool.| Replace the tool.
Cutting debris has contaminated the ball bearing.| Replace the ball bearings.
(Return to NAKANISHI dealer service.)
The ball bearings are worn.
Tool slippage.| Collet or collet nut are not correctly installed.| Check and clean the collet and collet nut. And, tighten the collet accurately again.
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 spindle.
The ball bearings are worn.| Replace the ball bearings.
(Return to NAKANISHI dealer service.)

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 electrical components .

NAKANISHI INC.
700 Shimohinata, Kanuma
Tochigi 322-8666 Japan
www.nakanishi-inc.com
NSK America Corp.
1800 Global Parkway
Hoffman Estates IL 60192, USA
www.nskamericacorp.com
NSK Europe GmbH
Elly-Beinhorn-Strasse8 65760 Eschborn Germany
NSK United Kingdom Ltd.
UK Authorised Representative
Office 4, Gateway 1000 Arlington Business Park, Whittle Way
Stevenage, SG1 2FP, UK
Contents are subject to change without notice.

References

• NSK America Corporation - High Precision Electric and Pneumatic High Speed Spindles and Hand Tools

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