4-4
4-4
D
Conductive Path
Noise signals with radical changes are transmitted from a power line to another line or control equip-
ment through the FG (frame ground) or conductive cable. Noise may be transmitted through the FG or
conductive cable after the noise is transmitted to the FG or conductive cable through the other noise
transmission paths.
Effects
Control equipment malfunctions.
Noise on power supply lines.
Power supply
Control equipment
Servo
Driver
Motor
D
Electromagnetic Inductive Path
Noise with radical changes creates magnetic fields around the noise. Such magnetic fields induce elec-
tromotive force from signal lines close to the magnetic fields. Such induction will increase in accordance
with an increase in noise-signal change level and a decrease in noise transmission distance between
the signal lines and magnetic fields.
Effects
Noise transmission between signal cables.
Noise from motor power lines.
Noise with radical changes
Electromotive force
Countermeasures Against Noise
Chapter 4
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