
B–62073E/04
3. INSTALLATION
31
Group ActionSignal line
C
Cable between the CNC and
servo amplifier
Bind the cables in group C
separately from group A or
p
Cable for position and velocity
feedback
cover group
w
an
electromagnetic shield.
Cable between the CNC and
spindle amplifier
Separate group C as far from
Cable for the position coder
Separate group C as far from
Group B as possible.
Cable for the manual pulse
generator
Be sure to perform shield
processing in Section 3.6.5.
Cable between the CRT and
MDI
RS232C and RS422 interface
cables
Cable for the battery
Other cables to be covered with
the shield
NOTE
1 The groups must be 10 cm or more apart from one another
when binding the cables in each group.
2 The electromagnetic shield refers to shielding between
groups with grounded steel plates.
The following ground systems are provided for the CNC machine tool:
(1)Signal ground system (SG)
The signal ground (SG) supplies the reference voltage (0 V) of the
electrical signal system to the machine.
(2)Frame ground system (FG)
The frame ground system (FG) is used for safety, and suppressing
external and internal noises. In the frame ground system, the frames
and cases of the units, panels, and shields for the interface cables
between the units are connected.
(3)System ground system
The system ground system is used to connect the frame ground
systems connected between devices or units with the ground.
3.6.2
Ground