Mazak VTC-160A, Maintenance Manual, Page: 10 / 96

ALWAYS TURN THE MAIN CIRCUIT BREAKER TO THE “OFF” POSITION & USE AN APPROVED
LOCKOUT DEVICE WHEN COMPLETING MAINTENANCE OR REPAIRS.
THE LOCKOUT PROCEDURE THAT FOLLOWS IS INTENDED TO SAFEGUARD PERSONNEL &
EQUIPMENT DURING MAINTENANCE OPERATIONS, AND, REPRESENTS THE MINIMUM
REQUIREMENTS. ANY ACTION SHOULD BE PRECEDED BY A “HAZARD ANALYSIS” TO DETERMINE
ANY ADDITIONAL SAFETY PRECAUTIONS THAT MAY BE NECESSARY TO ENSURE THE SAFETY OF
PERSONNEL AND EQUIPMENT.
NOTE: USE OF THE FOLLOWING LOCKOUT PROCEDURE IS MANDATORY WHEN COMPLETING
MAINTENANCE OR REPAIRS.
LOCKOUT PROCEDURE
1) THE LOCKOUT PROCESS MUST BE PERFORMED BY AUTHORIZED PERSONNEL ONLY.
2) INFORM ALL EFFECTED PERSONNEL OF YOUR INTENT TO LOCKOUT AND SERVICE THE
SPECIFIED MACHINE.
3) SHUT OFF MACHINE POWER USING NORMAL SHUT DOWN PROCEDURES.
4) TURN OFF THE MACHINE AND INDIVIDUAL BUILDING CIRCUIT BREAKERS. MAKE SURE ALL
STORED ELECTRICAL ENERGY IS RELIEVED. (EG: SPINDLE & AXIS SERVO CONTROLLERS)
5) CONNECT THE LOCKOUT DEVICE AS SHOWN IN FIGURE 1, AND ATTACH THE APPROPRIATE
TAG AT THE MACHINE CIRCUIT BREAKER. THE TAG MUST IDENTIFY THE PERSON
RESPONSIBLE FOR THE LOCKOUT. THIS WILL ENSURE THAT POWER CANNOT BE
RESTORED BY ANYONE ELSE.
6) TEST THE MACHINE TO VERIFY THAT MACHINE SYSTEMS DO NOT OPERATE IN ANY WAY.
ONCE TESTING IS COMPLETE, MAKE SURE ALL SWITCHES ARE IN THE “OFF” POSITION.
CONFIRM THAT THE LOCKOUT DEVICES REMAIN PROPERLY INSTALLED.
7) COMPLETE THE REQUIRED MAINTENANCE OPERATIONS.
8) MAKE SURE ALL PERSONNEL ARE CLEAR OF THE MACHINE.
9) REMOVE THE LOCKOUT DEVICE. MAKE SURE ALL PERSONNEL ARE AT A SAFE LOCATION
BEFORE RESTORING MACHINE POWER.
FIGURE
WARNING
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PADLOCK
S-4
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