
1.SYSTEM CONFIGURATION CONFIGURATIONS AND SELECTION B-65332EN/01
1.5.2 Driving Two Motors with One Large Amplifier
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With the methods introduced above, one motor is combined with one
amplifier. Combining one motor with one amplifier is the best method
from control and motor protection viewpoints because current is
controlled individually. For a machine having many axes, however,
the number of axes available for the CNC may be insufficient because
as many hardware axes as the number of amplifiers are required. To
resolve this problem, a method for connecting multiple motors in
parallel and driving them with a large-capacity amplifier is available.
The following figure is a typical example of this method. Two motors
can be seen as one motor from the amplifier. Therefore, the number of
rotary encoders is one and the number of required axes is also one.
NOTE
To drive multiple motors with one amplifier, special
parameter settings different from those used in
ordinary cases are required. For details, contact
FANUC.