
B–62075E/04
2. HARDWARE
86
The power capacity of the CNC control unit, which in this section means
the specification required for the power supply, is obtained by adding the
power capacity of the control section and the power capacity of the servo
section.
Power capacity of
the control
When the control unit has four slots or
less, and power supply AI is used.
0.4KVA
When the control unit has six or more
slots, or power supply BI is used.
1KVA
When the multiple axis is used. 2KVA
Power capacity of
the servo section
Depends on servo motor type.
The CNC has been steadily reduced in size using surface–mount and
custom LS1 technologies for electronic components. The CNC also is
designed to be protected from external noise. However, it is difficult to
measure the level and frequency of noise quantitatively, and noise has
many uncertain factors. It is important to prevent both noise from being
generated and generated noise from being introduced into the CNC. This
precaution improves the stability of the CNC machine tool system.
The CNC component units are often installed close to the parts generating
noise in the power magnetics cabinet. Possible noise sources into the
CNC are capacitive coupling, electromagnetic induction, and ground
loops.
When designing the power magnetics cabinet, guard against noise in the
machine as described in the following:
2.4.13
Power Capacity
2.4.14
Action Against Noise