(1
) Check the Interior and
Exterior
of
the Control
Cabinet.
●
Check the control panel
exterior for contamination
and/or damage.
“
Check the module con-
nections inside the
cabinet for tightness.
●
Check the cables and
lead bundle inside the
cabinet for damage.
(2) Check Screw Terminals for
Tightness.
“
Power input unit terminal
block
●
Power on /off pushbutton
switches on MDI and CRT
unit.
“
Control power transformer
terminal block
“
Check each terminal block
cover, if any, for
dislocation.
(3) Connect External Cables.
●
Check that the cable
shield is connected to the
ground block through a
clamp.
●
Check that a protective
ground wire is installed
between the NC and the
machine tool.
●
Check that the protective
-.
ground wire is of a
one-
point ground type.
Protective ground wire
137
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