
SAFETY PRECAUTIONS B-63945EN/02
s-8
WARNING
2. Absolute pulse coder battery replacement
When replacing the memory backup batteries, keep the power to
the machine (CNC) turned on, and apply an emergency stop to
the machine. Because this work is performed with the power on
and the cabinet open, only those personnel who have received
approved safety and maintenance training may perform this
work.
When replacing the batteries, be careful not to touch the
high-voltage circuits (marked
and fitted with an insulating
cover).
Touching the uncovered high-voltage circuits presents an
extremely dangerous electric shock hazard.
NOTE
The absolute pulse coder uses batteries to preserve its absolute
position.
If the battery voltage drops, a low battery voltage alarm is displayed
on the machine operator's panel or CRT screen.
When a low battery voltage alarm is displayed, replace the batteries
within a week. Otherwise, the absolute position data held by the pulse
coder will be lost.
To replace the battery, see the procedure described in Section 2.10 of
this manual.