Please read the instructions carefully before using the equipment.
To use the equipment correctly, do not attempt to install, operate, maintain, or inspect the equipment until you
have read through this Instruction Manual, MR-J3documents carefully. Do not use the servo amplifier and direct drive motor until you have a full knowledge of
the equipment, safety information and instructions.
In this Instruction Manual, the safety instruction levels are classified into "WARNING" and "CAUTION".
WARNING
CAUTION
Note that the CAUTION level may lead to a serious consequence according to conditions. Please follow the
instructions of both levels because they are important to personnel safety.
What must not be done and what must be done are indicated by the following diagrammatic symbols.
Indicates that incorrect handling may cause hazardous conditions,
resulting in death or severe injury.
Indicates that incorrect handling may cause hazardous conditions,
resulting in medium or slight injury to personnel or may cause physical
damage.
B Servo amplifier Instruction Manual, and appended
: Indicates what must not be done. For example, "No Fire" is indicated by
: Indicates what must be done. For example, grounding is indicated by
In this Instruction Manual, instructions at a lower level than the above, instructions for other functions, and so
on are classified into "POINT".
After reading this Instruction Manual, keep it accessible to the operator.
.
.
A - 1
1. To prevent electric shock, note the following
WARNING
Before wiring or inspection, turn off the power and wait for 15 minutes or more until the charge lamp turns
off. Then, confirm that the voltage between P(
Otherwise, an electric shock may occur. In addition, always confirm from the front of the servo amplifier,
whether the charge lamp is off or not.
Connect the servo amplifier and direct drive motor to ground.
Any person who is involved in wiring and inspection should be fully competent to do the work.
Do not attempt to wire the servo amplifier and direct drive motor until they have been installed. Otherwise,
it may cause an electric shock.
Operate the switches with dry hand to prevent an electric shock.
The cables should not be damaged, stressed, loaded, or pinched. Otherwise, it may cause an electric
shock.
During power-on or operation, do not open the front cover of the servo amplifier. Otherwise, it may cause
an electric shock.
Do not operate the servo amplifier with the front cover removed. High-voltage terminals and charging area
are exposed and you may get an electric shock.
Except for wiring or periodic inspection, do not remove the front cover even of the servo amplifier if the
power is off. The servo amplifier is charged and you may get an electric shock.
To prevent an electric shock, always connect the protective earth (PE) terminal (marked ) of the servo
amplifier to the protective earth (PE) of the cabinet.
When using a residual current device (RCD), select type B.
To avoid an electric shock, insulate the connections of the power supply terminals.
2. To prevent fire, note the following
) and N() is safe with a voltage tester and others.
CAUTION
Install the servo amplifier, direct drive motor and regenerative resistor on incombustible material. Installing
them directly or close to combustibles will lead to a fire.
Always connect a magnetic contactor between the power supply and the main circuit power supply of the
servo amplifier (L
side of the servo amplifier’s power supply. If a magnetic contactor is not connected, continuous flow of a
large current may cause a fire when the servo amplifier malfunctions.
When a regenerative resistor is used, use an alarm signal to switch main power off. Otherwise, a
regenerative transistor fault or the like may overheat the regenerative resistor, causing a fire.
Provide adequate protection to prevent screws and other conductive matter, oil and other combustible
matter from entering the servo amplifier and direct drive motor.
Always connect a molded-case circuit breaker to the power supply of the servo amplifier.
, L2, and L3), and configure the wiring to be able to shut down the power supply on the
1
A - 2
3. To prevent injury, note the following
CAUTION
Only the voltage specified in the Instruction Manual should be applied to each terminal, Otherwise, a burst,
damage, etc. may occur.
Connect the terminals correctly to prevent a burst, damage, etc.
Ensure that polarity (, ) is correct. Otherwise, a burst, damage, etc. may occur.
The servo amplifier heat sink, regenerative resistor, direct drive motor, etc. may be hot while power is on
or for some time after power-off. Take safety measures, e.g. provide covers, to prevent accidental contact
of hands and parts (cables, etc.) with them.
During operation, never touch the rotor of the direct drive motor. Otherwise, it may cause injury.
4. Additional instructions
The following instructions should also be fully noted. Incorrect handling may cause a fault, injury, electric shock,
etc.
(1) Transportation and installation
CAUTION
Transport the products correctly according to their mass.
Stacking in excess of the specified number of products is not allowed.
Do not carry the direct drive motor by holding the cables, rotor, encoder or connector.
Do not hold the front cover to transport the servo amplifier. The servo amplifier may drop.
Install the servo amplifier in a load-bearing place in accordance with the Instruction Manual.
Do not get on or put heavy load on the equipment.
The servo amplifier and direct drive motor must be installed in the specified direction.
Leave specified clearances between the servo amplifier and cabinet inside walls or other equipment.
Otherwise, it may cause a malfunction.
Do not install or operate the servo amplifier and direct drive motor which has been damaged or has any
parts missing.
Do not block intake and exhaust areas of the servo amplifier. Otherwise, it may cause a malfunction.
Do not drop or strike servo amplifier or direct drive motor. Isolate from all impact loads.
Securely attach the direct drive motor to the machine. If you attach it insecurely, the direct drive motor may
come off during operation.
Measure a direct drive motor, and check the motor vibration level. A great vibration may cause the early
damage of a bearing, encoder, and brake. The great vibration may also cause the poor connector
connection or bolt looseness.
For the gain adjustment at the equipment startup, check the torque waveform and the speed waveform by
using a measurement device, and then check that no vibration occurs. If the vibration occurs due to high
gain, the vibration may cause the early damage of the direct drive motor.
Take safety measures, e.g. provide covers, to prevent accidental access to the rotor of the direct drive
motor during operation.
Never hit the rotor of the direct drive motor, especially when coupling the direct drive motor to the machine.
Otherwise, the encoder may malfunction.
A - 3
CAUTION
Do not subject the rotor of the direct drive motor to more than the permissible load. Otherwise, the rotor
may break.
When the equipment has been stored for an extended period of time, contact your local sales office.
When you keep or use it, please fulfill the following environment.
Environment
[] 0 to 55 (non-freezing) 0 to 40 (non-freezing)
Ambient
temperature
[] 20 to 65 (non-freezing) 15 to 70 (non-freezing)
Ambient
Operation 90 RH or less (non-condensing) 80 RH or less (non-condensing)
humidity
Ambience Indoors (no direct sunlight) Free from corrosive gas, flammable gas, oil mist, dust and dirt
Altitude Max. 1000m above sea level
Vibration resistance
When treating the servo amplifier and direct drive motor be careful about the edged parts such as the
corners of the servo amplifier and direct drive motor.
The servo amplifier must be installed in the metal cabinet.
(2) Wiring
Item
Operation
Storage
Storage 90
[ ] 32 to 131 (non-freezing) 32 to 104 (non-freezing)
[ ] 4 to 149 (non-freezing) 5 to 158 (non-freezing)
Servo amplifier Direct drive motor
RH or less (non-condensing)
2
at 10 to 55Hz
5.9 m/s
(directions of X, Y and Z axes)
TM-RFM C20
TM-RFM
TM-RFM
TM-RFM
E20
G20
J10 X, Y: 24.5 m/s2
X, Y: 49 m/s
2
CAUTION
Wire the equipment correctly and securely. Otherwise, the direct drive motor may operate unexpectedly.
Do not install a power capacitor, surge killer or radio noise filter (FR-BIF option) between the direct drive
motor and servo amplifier.
To avoid a malfunction, connect the wires to the correct phase terminals (U, V, and W) of the servo
amplifier and direct drive motor.
A - 4
CAUTION
Connect the servo amplifier power supply output (U, V, and W) to the direct drive motor power supply input
(U, V, and W) directly. Do not let a magnetic contactor, etc. intervene. Otherwise, it may cause a
malfunction.
Servo amplifier
U
V
W
Direct drive motor
U
V
M
W
Servo amplifierDirect drive motor
U
V
W
U
V
M
W
Do not connect AC power directly to the direct drive motor. Otherwise, it may cause a malfunction.
The surge absorbing diode installed on the DC relay for control output should be fitted in the specified
direction. Otherwise, the emergency stop and other protective circuits may not operate.
Servo amplifier
DOCOM
Control output
signal
DICOM
For sink output interface
24VDC
RA
Servo amplifier
24VDC
DOCOM
Control output
signal
DICOM
For source output interface
RA
When the cable is not tightened enough to the terminal block (connector), the cable or terminal block
(connector) may generate heat because of the poor contact. Be sure to tighten the cable with specified
torque.
(3) Test run adjustment
CAUTION
Before operation, check the parameter settings. Improper settings may cause some machines to perform
unexpected operation.
The parameter settings must not be changed excessively. Operation will be instable.
(4) Usage
CAUTION
Provide an external emergency stop circuit to ensure that operation can be stopped and power switched
off immediately.
Any person who is involved in disassembly and repair should be fully competent to do the work.
Before resetting an alarm, make sure that the run signal of the servo amplifier is off to prevent an accident.
A sudden restart is made if an alarm is reset with the run signal on.
Do not modify the equipment.
Use a noise filter, etc. to minimize the influence of electromagnetic interference.
Electromagnetic interference may be given to electronic equipment used near the servo amplifier.
Burning or breaking a servo amplifier may cause a toxic gas. Do not burn or break a servo amplifier.
Use the servo amplifier with the specified direct drive motor.
A - 5
(5) Corrective actions
CAUTION
When it is assumed that a hazardous condition may take place at the occur due to a power failure or a
product fault, use a direct drive motor with an external brake mechanism for the purpose of prevention.
When any alarm has occurred, eliminate its cause, ensure safety, and deactivate the alarm before
restarting operation.
Design the machine in order to avoid sudden restarting in case of after an instantaneous power failure.
(6) Maintenance, inspection and parts replacement
CAUTION
With age, the electrolytic capacitor of the servo amplifier will deteriorate. To prevent a secondary accident
due to a fault, it is recommended to replace the electrolytic capacitor every 10 years when used in general
environment.
Please contact your local sales office.
(7) Storage
CAUTION
Note the following points when storing the direct drive motor for an extended period of time (guideline: three
or more months).
Always store the direct drive motor indoors in a clean and dry place.
If it is stored in a dusty or damp place, make adequate provision, e.g. cover the whole product.
If the insulation resistance of the winding decreases, reexamine the storage method.
Though the direct drive motor is rust-proofed before shipment using paint or rust prevention oil, rust may
be produced depending on the storage conditions or storage period.
If the direct drive motor is to be stored for longer than six months, apply rust prevention oil again especially
to the machined surfaces of the rotor, etc.
Before using the product after storage for an extended period of time, hand-turn the direct drive motor rotor
(output shaft) to confirm that nothing is wrong with the direct drive motor.
When the equipment has been stored for an extended period of time, contact your local sales office.
(8) General instruction
To illustrate details, the equipment in the diagrams of this Specifications and Instruction Manual may have
been drawn without covers and safety guards. When the equipment is operated, the covers and safety
guards must be installed as specified. Operation must be performed in accordance with this Specifications
and Instruction Manual.
A - 6
DISPOSAL OF WASTE
Please dispose a servo amplifier, battery (primary battery) and other options according to your local laws and
regulations.
EEP-ROM life
The number of write times to the EEP-ROM, which stores parameter settings, etc., is limited to 100,000. If the
total number of the following operations exceeds 100,000, the servo amplifier may fail when the EEP-ROM
reaches the end of its useful life.
Write to the EEP-ROM due to parameter setting changes
Write to the EEP-ROM due to device changes
Precautions for Choosing the Products
Mitsubishi will not be held liable for damage caused by factors found not to be the cause of Mitsubishi;
machine damage or lost profits caused by faults in the Mitsubishi products; damage, secondary damage,
accident compensation caused by special factors unpredictable by Mitsubishi; damages to products other
than Mitsubishi products; and to other duties.
COMPLIANCE WITH THE CE MARKING
Refer to Appendix 5 for the compliance with CE marking.
<<About the manuals>>
This Instruction Manual and the following manuals are required if you use this direct drive servo for the first
time. Always purchase them and use the direct drive servo safely.
A - 7
Relevant manuals
Manual name Manual No.
MELSERVO-J3 Series Instructions and Cautions for Safe Use of AC Servos IB(NA)0300077
MELSERVO-J3 Series MR-J3- B Servo Amplifier Instruction Manual SH(NA)030051
This Instruction Manual describes the functions unique to the SSCNET
Therefore, when using the MR-J3-
B-RJ080W, refer to the SSCNET Interface MR-J3- B Servo
Interface Direct Drive Servo.
Amplifier Instruction Manual as well. However, the following items are not described in this Instruction
Manual. For details of these items, refer to the MR-J3-
Item MR-J3- B Servo Amplifier Instruction Manual
INSTALLATION CHAPTER 2
STARTUP CHAPTER 4
GENERAL GAIN ADJUSTMENT CHAPTER 6
SPECIAL ADJUSTMENT FUNCTIONS CHAPTER 7
OPTIONS AND AUXILIARY EQUIPMENT CHAPTER 11
B Servo Amplifier Instruction Manual.
<<Wiring>>
Wires mentioned in this instruction manual are selected based on the ambient temperature of 40
1.2 Servo amplifier standard specifications................................................................................................... 1 - 3
1.3 Function list .............................................................................................................................................. 1 - 4
1.4 Model code definition ............................................................................................................................... 1 - 5
1.5 Combinations of servo amplifiers and direct drive motor........................................................................ 1 - 5
1.6 Parts identification .................................................................................................................................... 1 - 6
1.7 Configuration including auxiliary equipment............................................................................................ 1 - 9
2.3.4 Permissible load for the rotor ............................................................................................................ 2 - 4
2.3.5 Protection from oil and water ............................................................................................................ 2 - 5
2.5.5 Connection of servo amplifier and direct drive motor ..................................................................... 2 -32
B C D E F) .............................................. 2 - 9
3. SIGNALS AND WIRING 3 - 1 to 3 -12
3.1 Precautions for this chapter .....................................................................................................................3 - 2
3.2 Input power supply circuit ........................................................................................................................ 3 - 2
3.2.1 Selection example of wires ............................................................................................................... 3 - 3
3.2.2 Connection example ......................................................................................................................... 3 - 4
3.3 I/O signal connection example ................................................................................................................ 3 - 7
3.4 Connector and signal arrangements ....................................................................................................... 3 - 9
4.2 Magnetic pole detection ........................................................................................................................... 4 - 2
4.2.1 Preparation for the magnetic pole detection .................................................................................... 4 - 2
4.2.2 Driving when magnetic pole is detected........................................................................................... 4 - 3
4.2.3 Magnetic pole detection method setting........................................................................................... 4 - 6
4.2.4 Setting the magnetic pole detection voltage level of the position detection method ...................... 4 - 6
4.2.5 Magnetic pole detection method using MR Configurator................................................................. 4 - 8
4.3 Operation from the controller .................................................................................................................. 4 -10
5.2.1 Parameter list .................................................................................................................................... 5 - 2
5.2.2 List of details...................................................................................................................................... 5 - 3
5.3 Gain/Filter parameters (No.PB
5.3.1 Parameter list .................................................................................................................................... 5 - 5
5.4 Extension setting parameters (No.PC
5.4.1 Parameter list .................................................................................................................................... 5 - 6
5.5 I/O setting parameters (No.PD
5.5.1 Parameter list .................................................................................................................................... 5 - 7
5.6 Special setting parameters (No.PS
5.6.1 Parameter list .................................................................................................................................... 5 - 8
5.6.2 List of details...................................................................................................................................... 5 - 9
6.1 Alarms and warning list ............................................................................................................................ 6 - 1
6.2 Remedies for alarms ................................................................................................................................ 6 - 2
6.3 Remedies for warnings ............................................................................................................................ 6 - 6
App. 2 Signal layout recording paper ........................................................................................................App.- 3
App. 3 Handling of AC servo amplifier batteries for the United Nations Recommendations on the
Transport of Dangerous Goods ....................................................................................................App.- 3
App. 4 Symbol for the new EU Battery Directive ......................................................................................App.- 5
App. 5 Compliance with the CE marking...................................................................................................App.- 6
3
MEMO
4
1. FUNCTIONS AND CONFIGURATION
1. FUNCTIONS AND CONFIGURATION
1.1 Summary
To meet high-accuracy and high-efficiency requirements in areas including semiconductor and liquid crystal
related machines, and surface mount device placement machines, a system with a direct drive motor in a drive
axis has been increased. The direct drive servo system includes the following features.
(1) Performance
(a) Since load is directly coupled to the direct drive motor, gear reducer and transmission elements can be
(2) Mechanism
eliminated, offering greater rigidity and torque.
(b) The high-resolution encoder contributes to high-accuracy control.
(c) Due to the gearless structure, error caused by backlash can be eliminated, offering high-accuracy
operation and shorter settling time.
(d) Because of no reduction gear or others, the direct drive motor does not deteriorate with time.
(a) The motor's low profile design contributes to compact construction and a low center of gravity for
enhanced machine stability.
(b) The motor has an inner rotor with hollow shaft which enables cables and pipes to be passed through.
(c) Lubrication and maintenance due to abrasion is not required.
The following shows the differences between the direct drive servo and the MR-J3-
B.
1 - 1
1. FUNCTIONS AND CONFIGURATION
Classification Item
(MR-J3-
External I/O signal Stroke limit input signal
(FLS, RLS)
Motor pole adjustment Magnetic pole detection
operation
Absolute position
detection system
Alarm/warning Alarm/warning designed
Battery for absolute position
encoder
(MR-J3BAT)
Absolute position storage unit
(MR-BTAS01)
exclusively for the direct drive
servo
Required (when
magnetic pole is
detected)
Required Not required (adjusted
Required Required
Required Not required
Addition Alarm/warning which is added
Differences
Direct drive servo
B-RJ080W)
MR-J3-
Not required Automatically turns on in the
at shipment)
B
parameter setting.
Automatically executed at the
first servo-on after turning the
power on.
For the absolute position
detection system, the
magnetic polarity detection
can be made invalid in the
setting of parameter No.PS01.
(Refer to section 4.2.2 (2).)
or the contents is changed
Remarks
Encoder combination error
(1F)
Encoder error2 (20)
Encoder error3 (21)
Absolute position erase (25)
Initial magnetic pole
detection error (27)
Encoder counter error (2B)
Servo control error (42)
Direct drive motor overheat
(46)
Battery cable disconnection
warning (92)
Battery warning (9F)
Direct drive motor overheat
warning (E2)
1 - 2
1. FUNCTIONS AND CONFIGURATION
1.2 Servo amplifier standard specifications
Servo amplifier
MR-J3-
Item
Rated voltage 3-phase 170VAC
Output
Rated current [A] 1.5 2.8 3.2 5.8 6.0 17.0 28.0
Voltage/frequency 3-phase or 1-phase 200 to 230VAC, 50/60Hz 3-phase 200 to 230VAC, 50/60Hz
Rated current [A] 1.5 2.6 3.2 3.8 5.0 16.0 21.7
Permissible voltage fluctuation 3-phase or 1-phase 170 to 253VAC 3-phase 170 to 253VAC
Permissible frequency
fluctuation
Power supply capacity Refer to section 2.5.2
Main circuit power supply
Inrush current Refer to section 10.5 "MR-J3- B Servo Amplifier Instruction Manual"
Control circuit
power supply
Interface power
supply
Control system Sine-wave PWM control, current control system
Dynamic brake Built-in
Protective functions
Close mounting (Note 2)
Structure Natural-cooling, open (IP rating: IP00) Force-cooling, open (IP rating: IP00)
Ambient
temperature
humidity
Ambient
Environmental conditions
Altitude Max. 1000m above sea level
Vibration resistance 5.9m/s2 10 to 55Hz (directions of X, Y and Z axes)
Mass
Note 1. 0.15A is the value applicable when all I/O signals are used. The current capacity can be decreased by reducing the number of
I/O points.
2. When closely mounting servo amplifiers, operate them at the ambient temperatures of 0 to 45
Note. Production year and month of the direct drive motor are indicated in a serial number on the
rating plate.
The year and month of manufacture are indicated by the last two digits of the year and one
digit of the month [1 to 9, X(10), Y(11), and Z(12)].
For Nov. 2012, the Serial No. is like, "SER. No.
Z-phase mark
Model
Input power supply
Rated output
Rated speed, IP rating, Insulation class, Mass
Serial number (Note)
Country of origin
12Y".
Rotor (output shaft)
Encoder connector
Power supply connector
Power supply (U, V, and W)
Earth ( )
2 - 1
2. DIRECT DRIVE MOTOR
2.3 Installation
WARNING
CAUTION
To prevent electric shock, ground each equipment securely.
Stacking in excess of the limited number of product packages is not allowed.
Install the equipment on incombustible material. Installing it directly or close to
combustibles will lead to a fire.
Install the equipment in a load-bearing place in accordance with this Instruction
Manual.
Do not get on or put heavy load on the equipment to prevent injury.
Use the equipment within the specified environmental condition range.
Refer to the specifications of the direct drive motor series.
Do not subject the direct drive motor to drop impact or shock loads as they are
precision equipment.
Do not install or operate the direct drive motor which has been damaged or has any
parts missing.
Do not carry the direct drive motor by holding the cables, rotor, encoder or
connector. Otherwise, a fault or injury may occur.
Securely fix the direct drive motor to the machine. If fixed insecurely, the direct drive
motor will come off during operation, leading to injury.
Measure a direct drive motor, and check the motor vibration level. A great vibration
may cause the early damage of a bearing, encoder, and brake. The great vibration
may also cause the poor connector connection or bolt looseness.
For the gain adjustment at the equipment startup, check the torque waveform and
the speed waveform by using a measurement device, and then check that no
vibration occurs. If the vibration occurs due to high gain, the vibration may cause the
early damage of the direct drive motor.
When coupling the rotor end of the direct drive motor, do not subject the rotor end to
impact, such as hammering. The encoder may become faulty.
When coupling a load to the direct drive motor, make sure to align and center the
load on the motor flange rabbet. Particularly, when the rigid coupling is used, the
slight center deviation may cause the decline of the position accuracy, and may
cause the rotor damage.
Balance the load to the extent possible. Failure to do so can cause vibration during
direct drive motor operation or damage the bearings and encoder.
Take safety measures, e.g. provide covers, to prevent accidental access to the rotor
of the direct drive motor during operation.
Do not subject the direct drive motor rotor to more than the permissible load.
Otherwise, the rotor may break, leading to injury.
When the product has been stored for an extended period of time, contact your local
sales office.
When treating the direct drive motor, be careful about the edged parts such as the
corners of the direct drive motor.
2 - 2
2. DIRECT DRIVE MOTOR
2.3.1 Equipment configuration
This section explains the system configuration with a direct drive motor. Note the following points when using a
direct drive motor.
(1) Minimum oscillation angle
If the direct drive motor rotates repeatedly by a small angle (by 70° or less), make the direct drive motor
rotate by 90° or more at least once a day in order to keep the bearing lubricated.
(2) Z-phase position
A Z-phase pulse turns on (Z-phase mark passing) when the Z-phase mark on the rotor end of the direct
drive motor passes over the connector area. Keep the Z-phase position visible even after the direct drive
motor is installed to a machine.
Z-phase mark
Rotor (output shaft)
Z-phase pulse turns
on when the Z-phase
mark passes over
the connector area.
Encoder connector
Power supply connector
(3) Precautions for Z-phase mark passing
After power on, the Z-phase mark of the direct drive motor must pass the connector area once. In a system
which prevents the direct drive motor from making a full rotation, install the direct drive motor in a position
where the Z-phase mark can pass over the connector area.
(4) Vertical axis (lift)
For the system where the unbalanced torque occurs, such as a vertical axis system (lift), use the motor in
the absolute position detection system. In the absolute position detection system, the absolute position is
established when the Z-phase mark passes the connector area once.
At the system startup, make the Z-phase mark pass over the connector area, and switch the servo
amplifier's power supply from off to on.
If the direct drive motor can be rotated manually, make the Z-phase mark pass over the connector area
while only the servo amplifier's control power supply is on. After that, switch the servo amplifier's power
supply from off to on.
If the direct drive motor cannot be rotated manually, detect the magnetic poles while the torque is balanced,
then run the direct drive motor in the test mode to make its Z-phase mark pass over the connector area.
After that, switch the servo amplifier's power supply from off to on.
After the Z-phase mark passes through the connector area once, magnetic pole detection is not required.
2 - 3
2. DIRECT DRIVE MOTOR
2.3.2 Installation orientation
The following table indicates the installation orientation of the direct drive motor.
Direct drive motor series Direction of installation
TM-RFM May be installed in any direction.
2.3.3 Load remove precautions
POINT
During assembling, the rotor end must not be hammered. Doing so can cause the
encoder to fail.
(1) The orientation of the encoder on the direct drive motor cannot be changed.
(2) For installation of the direct drive motor, use spring washers, etc. and fully tighten the bolts so that they do
not become loose due to vibration.
2.3.4 Permissible load for the rotor
POINT
Because the rigid coupling may damage the rotor, make sure to align and center
the load on the rotor.
For the permissible rotor load specific to the direct drive motor, refer to section 2.5.2.
(1) When coupling a load to the direct drive motor, the load applied to the rotor must be under the permissible
load.
(2) Excess of the permissible load can cause the bearing life to reduce and the rotor to break.
(3) The load indicated in this section is static load in a single direction and does not include eccentric load.
Make eccentric load as small as possible. Not doing so can cause the direct drive motor to be damaged.
2 - 4
2. DIRECT DRIVE MOTOR
2.3.5 Protection from oil and water
Provide adequate protection to prevent foreign matter, such as oil and water from entering the direct drive motor
rotor. When installing the direct drive motor, consider the items in this section.
(1) Do not use the direct drive motor with its cable soaked in oil or water.
Cover
Direct drive motor
Oil/water pool
Capillary phenomenon
(2) Provide measures so that the direct drive motor is not exposed to oil and water entering from the machine
side, rotating table, etc.
Rotating table etc.
Lubricating oil
Direct drive motor
(3) If the direct drive motor is exposed to cutting fluid, etc., the sealant, packing, cable and others may be
affected depending on the fluid type.
(4) In the environment where the direct drive motor is exposed to oil mist, oil, water, grease and/or like, a
standard specification direct drive motor may not be usable. Provide measures to prevent dust and/or water
on the machine side.
2 - 5
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