To protect personnel and the machine from damage due to unexpected accidents, safety devices are installed on this machine. However, the operator must not rely solely on these safety devices, but must also be thoroughly familiar with the safety procedures described below to ensure trouble-free operation.
This safety manual and the warning labels affixed to the machine cover only hazards that Okuma can foresee. Note, however, that they do not cover all possible hazards.

1. Precautions for Installation

1. Observe the following precautions regarding the main power supply.
   • Do not draw the main power supply from a distribution panel that also supplies power to a major noise source (such as an electric welder or electric discharge machine, etc.); otherwise, NC unit malfunction may result.
   • If possible, connect an independent ground wire for this machine. If a common ground with other machines must be used, the other machines (such as electric welders, electric discharge machines, etc.) must not generate excessive electrical noise.
2. Installation Environment
   Observe the following precautions when installing the control cabinet.
   • Ensure that the NC unit is not exposed to direct sunlight.
   • Ensure that the control cabinet is not splashed with chips, water, or oil.
   • Ensure that the control cabinet and operation panel are not subjected to excessive vibration or shock.
   • The allowable ambient temperature range for the control cabinet is 5 to 40°C.
   • The allowable ambient humidity range for the control cabinet is 50% or less at 40°C (no condensation).
   • The maximum altitude at which this control cabinet can be used is 1000m.

2. Points to Check Before Turning on Power

1. Close all doors of the control cabinet and operation panel to prevent water, chips, and dust from entering.
2. Before starting the machine, make absolutely sure that no one is near moving parts of the machine and that there are no obstacles around the machine.
3. When turning on the power, first turn on the main power switch, and then turn on the power switch on the operation panel.

3. Precautions for Operation

1. After turning on the power, perform inspection and adjustment according to the daily inspection procedures described in this manual.
2. The size and type of tools used must be suitable for the operation to be performed and the machine specifications. Do not use severely worn tools, as this may cause accidents.
3. Never touch the spindle or tool while spindle indexing is in progress, as the spindle may rotate at any time in this condition, creating a hazard.
4. Check and make sure that the workpiece and tools are securely mounted.
5. Never touch a rotating workpiece or tool directly with hands, as this is very hazardous.
6. Do not attempt to remove chips with your hands while the machine is running. Doing so is hazardous. Stop the machine first, and then remove chips with a brush or broom.
7. All safety devices are essential while the machine is operating. Never remove any protective covers while the machine is in operation unless absolutely necessary.
8. Always stop the machine before mounting or removing tools.
9. Do not approach or touch moving parts of the machine while the machine is in operation.
10. Do not touch switches or buttons with wet hands. Doing so is extremely hazardous.
11. Visually verify switches and keys on the operation panel carefully before operating them.

4. Precautions for ATC

1. The tool clamping mechanisms of the magazine, spindle, etc., are designed to be highly reliable. However, a tool could loosen and fall due to an unforeseen accident, causing a hazard; therefore, never touch or approach the ATC unit while the ATC is in operation.
2. Always inspect and change tools in the manual insertion mode.
3. Chips adhering to the magazine will cause operation failure; therefore, remove chips periodically. Do not use compressed air for cleaning, as this will blow chips into the magazine.
4. If the ATC stops for any reason during operation and must be checked without turning off the power, never touch the ATC, as it may suddenly start moving at any time.

5. Precautions at the End of Work

1. After completing work, clean the area around the machine.
2. Return the ATC, APC, and other equipment to their predetermined retracted positions.
3. Always turn off the machine power supply before leaving the machine.
4. When turning off the power, first turn off the power switch on the operation panel, and then turn off the main power switch.

6. Precautions for Maintenance/Inspection and When Trouble Occurs

To prevent accidents, machine damage, etc., be sure to observe the following points when trouble occurs or when performing maintenance and inspection.

1. In the event of a failure, press the EMERGENCY STOP button on the operation panel to stop machine operation.
2. Consult with maintenance personnel to determine the appropriate measures to be taken.
3. If two or more persons must work together, establish a set of signals so that they can communicate with each other before starting each new machining step to ensure safety.
4. Use only specified replacement parts and fuses.
5. Always turn off the power supply before starting inspection or replacement of parts.
6. If parts are removed during inspection or maintenance, reinstall them in their original positions after servicing and secure them firmly using the original bolts and fasteners.
7. If inspection requires the use of measuring instruments (such as for voltage inspection), confirm that the instrument has been calibrated.
8. Do not place flammable materials or metals inside the control cabinet or terminal box.
9. Inspect to ensure that cables and wires are free of damage. Damaged cables and wires can cause electric leakage and electric shock.
10. Maintenance inside the control cabinet.
    • Before opening the control cabinet door, turn off the main power switch.
    • Even after the main power switch is turned OFF, residual electric charge remains in the MCS drive unit (servo unit / spindle); therefore, any work on this unit must be performed only by maintenance personnel. Even maintenance personnel must strictly observe the following precautions.
      1. MCS drive unit (servo unit / spindle)
         Residual electric charge is completely discharged 2 minutes after the main power switch is turned off.
    • The control cabinet contains the NC unit, which includes a printed circuit board with memory storing machine programs, parameters, etc. To preserve the contents of this memory even when the power is turned off, the memory is backed up by a battery.
      Memory contents may be lost due to improper handling of the printed circuit board; therefore, only maintenance personnel are permitted to handle the printed circuit board.
11. Periodic inspection of the control cabinet
    • Cleaning the cooling unit
      The cooling unit on the control cabinet door prevents excessive temperature rise inside the control cabinet and improves the reliability of the NC unit.
      Inspect the following items every three months.
      1. Does the fan motor in the cooling unit operate normally?
         If the cooling unit blows air strongly, the motor is operating normally.
      2. Is the air intake clogged?
         If it is clogged, clean it with compressed air.

7. General Precautions

1. Keep the area around the machine clean and tidy.
2. Wear appropriate work clothes during work and proceed according to instructions from qualified training personnel.
3. Operators must ensure that their clothing and hair cannot become entangled in the machine. Safety protective gear, such as safety shoes and safety goggles, must be worn.
4. Before operating the machine, the operator must carefully read the instruction manual and thoroughly master the correct operating procedures.
5. Keep the location of the EMERGENCY STOP button in mind so that it can be pressed immediately at any time and from any position.
6. Do not touch the inside of the control panel, transformer, motor, etc., as they contain high-voltage terminals and other extremely dangerous components.
7. If two or more persons must work together, establish a set of signals so that they can communicate with each other before starting each new machining step to ensure safety.

8. Symbols Used in This Manual

The following warning symbols are used in this manual to alert you to particularly important information. Carefully read and follow the instructions marked with these symbols.

Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.

Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.

Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury.

Indicates a potential hazard which, if not avoided, will result in property damage.

Indicates general instructions for safe operation.