
8.MAINTENANCE B-63494EN/02
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WARNINGS RELATED TO REPLACEMENT
WARNING
1. Always turn off the power to the CNC and the main power to the
power magnetics cabinet. If only the power to the CNC is turned
off, power may continue to be supplied to the serve section.
In such a case, replacing a unit may damage the unit, while also
presenting a danger of electric shock.
2. When a heavy unit is to be replaced, the task must be undertaken
by two persons or more. If the replacement is attempted by only
one person, the replacement unit could slip and fall, possibly
causing injury.
3. After the power is turned off, the servo amplifier and spindle
amplifier may retain voltages for a while, such that there is a
danger of electric shock even while the amplifier is turned off.
Allow at least twenty minutes after turning off the power for
these residual voltages to dissipate.
4. When replacing a unit, ensure that the new unit has the same
parameter and other settings as the old unit. (For details, refer to
the manual provided with the machine.) Otherwise, unpredictable
machine movement could damage the workpiece or the machine
itself, and present a danger of injury.
5. After replacing a safety related unit such as encoder and I/O
module, conduct a check test on the safety related and record the
test results in a check report.
WARNINGS RELATED TO PARAMETERS
WARNING
1. When machining a workpiece for the first time after modifying a
parameter, close the machine cover. Never use the automatic
operation function immediately after such a modification.
Instead, confirm normal machine operation by using functions
such as the single block function, feedrate override function, and
machine lock function, or by operating the machine without
mounting a tool and workpiece. If the machine is used before
confirming that it operates normally, the machine may move
unpredictably, possibly damaging the machine or workpiece, and
presenting a risk of injury.
2. The CNC and PMC parameters are set to their optimal values, so
that those parameters usually need not be modified. When a
parameter must be modified for some reason, ensure that you
fully understand the function of that parameter before attempting
to modify it. If a parameter is set incorrectly, the machine may
move unpredictably, possibly damaging the machine or
workpiece, and presenting a risk of injury.