Precautions for safety
Please read this manual and auxiliary documents before starting installation, operation, maintenance or inspection to ensure correct usage. Thoroughly understand the device, safety information and precautions before starting operation.
The safety precautions in this instruction manual are ranked as "WARNING" and "CAUTION".
DANGER
When there is a potential risk of fatal or serious injuries if handling is mistaken.
WARNING
When operator could be fatally or seriously injured if handling is mistaken.
CAUTION
When a dangerous situation may occur if handling is mistaken leading to medium or minor injuries, or physical damage.
Note that some items described as
CAUTION
may lead to major results depending on the situation. In any case, important information that must be observed is described.
The numeric control unit is configured of the control unit, operation board, servo drive unit, spindle drive unit, power supply, servomotor and spindle motor, etc.
In this section "Precautions for safety", the following items are generically called the "motor".
• Servomotor
• Spindle motor
In this section "Precautions for safety", the following items are generically called the "unit".
• Servo drive unit
• Spindle drive unit
• Power supply unit
ii
WARNING
1. Electric shock prevention
Do not open the front cover while the power is ON or during operation. Failure to observe this could lead to electric shocks.
Do not operate the unit with the front cover removed. The high voltage terminals and charged sections will be exposed, and can cause electric shocks.
Do not remove the front cover even when the power is OFF unless carrying out wiring work or periodic inspections. The inside of the servo drive units is charged, and can cause electric shocks.
Wait at least 15 minutes after turning the power OFF before starting wiring, maintenance or inspections. Failure to observe this could lead to electric shocks.
Ground the servo drive unit and servomotor with Class C (former class 3) grounding or higher.
Wiring, maintenance and inspection work must be done by a qualified technician.
Wire the servo drive unit and servomotor after installation. Failure to observe this could lead to electric shocks.
Do not touch the switches with wet hands. Failure to observe this could lead to electric shocks.
Do not damage, apply forcible stress, place heavy items on the cables or get them caught.
Failure to observe this could lead to electric shocks.
CAUTION
1. Fire prevention
Install the servo drive units, servomotors and regenerative resistor on noncombustible material. Direct installation on combustible material or near combustible materials could lead to fires.
Shut off the power on the servo drive unit side if the servo drive unit fails. Fires could be caused if a large current continues to flow.
When using a regenerative resistor, provide a sequence that shuts off the power with the regenerative resistor's error signal. The regenerative resistor could abnormally overheat and cause a fire due to a fault in the regenerative transistor, etc.
The battery unit could heat up, ignite or rupture if submerged in water, or if the poles are incorrectly wired.
2. Injury prevention
Do not apply a voltage other than that specified in Instruction Manual on each terminal.
Failure to observe this item could lead to ruptures or damage, etc.
Do not mistake the terminal connections. Failure to observe this item could lead to ruptures or damage, etc.
Do not mistake the polarity ( + , – ). Failure to observe this item could lead to ruptures or damage, etc.
The servo drive unit's fins, regenerative resistor and servomotor, etc., may reach high temperatures while the power is ON, and may remain hot for some time after the power is turned OFF. Touching these parts could result in burns. iii
CAUTION
3. Various precautions
Observe the following precautions. Incorrect handling of the unit could lead to faults, injuries and electric shocks, etc.
(1) Transportation and installation
Correctly transport the product according to its weight.
Use the servomotor's hanging bolts only when transporting the servomotor. Do not transport the servomotor when it is installed on the machine.
Do not stack the products above the tolerable number.
Do not hold the cables, axis or detector when transporting the servomotor.
Do not hold the connected wires or cables when transporting the servo drive units.
Do not hold the front cover when transporting the servo drive units. The unit could drop.
Follow this Instruction Manual and install in a place where the weight can be borne.
Do not get on top of or place heavy objects on the unit.
Always observe the installation directions.
Secure the specified distance between the servo drive unit and control panel's inner wall, and between other devices.
Do not install or run a servo drive unit or servomotor that is damaged or missing parts.
Do not block the intake or exhaust ports of the servomotor provided with a cooling fan.
Do not let foreign objects enter the servo drive units or servomotors. In particular, if conductive objects such as screws or metal chips, etc., or combustible materials such as oil enter, rupture or breakage could occur.
The servo drive units and servomotors are precision devices, so do not drop them or apply strong impacts to them. iv
CAUTION
Store and use the units under the following environment conditions.
Environment
Ambient temperature
Ambient humidity
Storage temperature
Storage humidity
Atmosphere
Conditions
Servo drive unit Servomotor
0°C to +55°C (with no freezing) 0°C to +40°C (with no freezing)
90%RH or less
(with no dew condensation)
80%RH or less
(with no dew condensation)
–15°C to +70°C
90%RH or less (with no dew condensation)
Indoors (where unit is not subject to direct sunlight), with no corrosive gas, combustible gas, oil mist, or dust
Altitude
Vibration 4.9m/s
2
1,000m or less above sea level
(0.5G) or less
Follows each specifications manual
Securely fix the servomotor to the machine. Insufficient fixing could lead to the servomotor slipping off during operation.
Always install the servomotor with reduction gear in the designated direction. Failure to do so could lead to oil leaks.
Structure the rotary sections of the servomotor so that it can never be touched during operation. Install a cover, etc., on the shaft.
When installing a coupling to a servomotor shaft end, do not apply an impact by hammering, etc. The detector could be damaged.
Do not apply a load exceeding the tolerable load onto the servomotor shaft. The shaft could break.
Store the motor in the package box.
When inserting the shaft into the built-in IPM motor, do not heat the rotor higher than
130°C. The magnet could be demagnetized, and the specifications characteristics will not be ensured.
If the unit has been stored for a long time, always check the operation before starting actual operation. Please contact the Service Center or Service Station. v
CAUTION
(2) Wiring
Correctly and securely perform the wiring. Failure to do so could lead to runaway of the servomotor.
Do not install a condensing capacitor, surge absorber or radio noise filter on the output side of the servo drive unit.
Correctly connect the output side (terminals U, V, W). Failure to do so could lead to abnormal operation of the servomotor.
Do not directly connect a commercial power supply to the servomotor. Failure to observe this could result in a fault.
Servodrive unit Servodrive unit
COM
(24VDC)
COM
(24VDC)
When using an inductive load such as a relay, always connect a diode as a noise measure parallel to the load.
Control output signal
RA
Control output signal
RA
When using a capacitance load such as a lamp, always connect a protective resistor as a noise measure serial to the load.
Do not reverse the direction of a diode which connect to a DC relay for the control output signals to suppress a surge. Connecting it backwards could cause the drive unit to malfunction so that signals are not output, and emergency stop and other safety circuits are inoperable.
Do not connect/disconnect the cables connected between the units while the power is ON.
Securely tighten the cable connector fixing screw or fixing mechanism. An insecure fixing could cause the cable to fall off while the power is ON.
When using a shielded cable instructed in the connection manual, always ground the cable with a cable clamp, etc.
Always separate the signals wires from the drive wire and power line.
Use wires and cables that have a wire diameter, heat resistance and flexibility that conforms to the system. vi
CAUTION
(3) Trial operation and adjustment
Check and adjust each program and parameter before starting operation. Failure to do so could lead to unforeseen operation of the machine.
Do not make remarkable adjustments and changes as the operation could become unstable.
(4) Usage methods
Install an external emergency stop circuit so that the operation can be stopped and power shut off immediately.
Turn the power OFF immediately if smoke, abnormal noise or odors are generated from the servo drive unit or servomotor.
Unqualified persons must not disassemble or repair the unit.
Never make modifications.
Reduce magnetic damage by installing a noise filter. The electronic devices used near the servo drive unit could be affected by magnetic noise.
Use the servo drive unit, servomotor and regenerative resistor with the designated combination. Failure to do so could lead to fires or trouble.
The brake (magnetic brake) assembled into the servomotor are for holding, and must not be used for normal braking.
There may be cases when holding is not possible due to the magnetic brake's life or the machine construction (when ball screw and servomotor are coupled via a timing belt, etc.).
Install a stop device to ensure safety on the machine side.
After changing the programs/parameters or after maintenance and inspection, always test the operation before starting actual operation.
Do not enter the movable range of the machine during automatic operation. Never place body parts near or touch the spindle during rotation.
Follow the power supply specification conditions given in the separate specifications manual for the power (input voltage, input frequency, tolerable sudden power failure time, etc.).
Set all bits to "0" if they are indicated as not used or empty in the explanation on the bits.
Do not use the dynamic brakes except during the emergency stop. Continuous use of the dynamic brakes could result in brake damage.
If a breaker is shared by several power supply units, the breaker may not activate when a short-circuit fault occurs in a small capacity unit. This is dangerous, so never share the breakers. vii
CAUTION
(5) Troubleshooting
If a hazardous situation is predicted during power failure or product trouble, use a servomotor with magnetic brakes or install an external brake mechanism.
Use a double circuit configuration
Shut off with the servomotor brake control output.
Shut off with NC brake control PLC output.
that allows the operation circuit for the magnetic brakes to be operated
Servomotor
MBR EMG even by the external emergency stop signal.
Magnetic brake
24VDC
Always turn the input power OFF when an alarm occurs.
Never go near the machine after restoring the power after a power failure, as the machine could start suddenly. (Design the machine so that personal safety can be ensured even if the machine starts suddenly.)
(6) Maintenance, inspection and part replacement
Always carry out maintenance and inspection after backing up the servo drive unit's programs or parameters.
The capacity of the electrolytic capacitor will drop over time. To prevent secondary disasters due to failures, replacing this part every five years when used under a normal environment is recommended. Contact the Service Center or Service Station for replacement.
Do not perform a megger test (insulation resistance measurement) during inspections.
If the battery low warning is issued, save the machining programs, tool data and parameters with an input/output unit, and then replace the battery.
Do not short circuit, charge, overheat, incinerate or disassemble the battery.
(7) Disposal
Dispose of this unit as general industrial waste. Note that MDS Series unit with a heat dissipating fin protruding from the back of the unit contains substitute Freon. Do not dispose of this type of unit as general industrial waste. Always return to the Service Center or Service
Station.
Do not disassemble the servo drive unit or servomotor parts.
Dispose of the battery according to local laws.
(8) General precautions
The drawings given in this Specifications and Maintenance Instruction Manual show the covers and safety partitions, etc., removed to provide a clearer explanation. Always return the covers or partitions to their respective places before starting operation, and always follow the instructions given in this manual. viii
