
B-63945EN/02 SAFETY PRECAUTIONS
s-5
1.3 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.