
3. ACTION AGAINST NOISE
B--65245EN/02
TROUBLESHOOTING AND
COUNTERMEASURES
144
3
ACTION AGAINST NOISE
The servo amplifier unit has been steadily reduced in size using
surface--mount and custom LSI technologies for electronic components.
The servo amplifier unit also is designed to be protect ed from external
noise. However, i t is difficult to measure the level and frequency of noise
quantitatively, and noise has m any uncertain factors. It is important to
prevent both noise from being generated and generated noise from being
introduced into the servo amplifier unit. This precaution improves the
stability of the servo amplifier unit machine tool system.
The servo amplifier unit component units are often installed close to the
parts generating noise in the power magnetics cabinet. P ossible noise
sources into the servo amplifier unit 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 section.