Mazak VTC-160A, Maintenance Manual, Page: 26 / 96

2-4
CAUTION
l
Do not allow chips to accumulate during heavy-duty cutting since they will be hot and could
start a fire.
l
Warm up the spindle and all of the axis motion mechanisms before operation. (Operate
the machine in the automatic mode for 10 to 20 minutes at maximum spindle speed or at
1/3 to 1/2 maximum axis motion speed.)
l Write the program for the warming-up operation so as to execute the functions of the full
range of machine components . If operation is to be performed at spindle speeds in excess
of 4000 min
–1
, pay meticulous attention to the warming-up operation.
l
Do not operate the operation panel switches while wearing gloves as this could lead to
incorrect operation or other mistakes.
l
When one series of operations is completed, switch off the power switch on the NC
operation panel, the main power breaker, and then the factory power supply.
2-5 Safety Considerations Relating to Holding Workpieces and Tooling
WARNING
l
Always use tools, which are suitable for the work to be carried out and conform to the
machine specifications. Always observe the restrictions on weight of tool insert and tool
diameter stipulated in the specifications. [Max. insert weight: 20 gf (0.04 lbs)]
l Replace tools promptly, since badly worn tools can cause accidents and injuries.
l
Before starting operation, check that the workpiece is securely mounted and cannot
become detached by the cutting forces applied to it during machining.
l
Before mounting a cutting tool in the machine, make sure that the tool and its stud bolt are
properly secured.
l
Do not rotate a cutting tool or holder at speeds higher than the rated speed.
l Check the maximum safe operating speed with the manufacturer.
l Be very careful not to catch your fingers in workpiece holding devices.
l
Always use the correct lifting gear for heavy fixtures and workpieces.
CAUTION
l
Make sure that cutting tools will not interfere with the workpiece fixture, etc.
l
Mount the tool holder in the correct orientation by aligning it with the drive key.
l
Occasionally check for looseness after using a milling chuck.
l Make sure that the workpiece is correctly mounted on the pallet or table.
l
Check that vices, fixtures, etc., have no overhang with respect to the table.
l
Make sure that the tools are arranged in the tool magazine correctly in accordance with the
tool data set in the TOOL LAYOUT display.
l
Check that the lengths of all tools to be used have been measured.
l
Move the tool nose to the initial point (X0, Y0) to check the basic coordinate system.
l Perform a test operation after mounting a cutting tool and workpiece.
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