
B-65332EN/01 HANDLING, DESIGN, AND ASSEMBLY 2.MECHANICAL DESIGN
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2.1 MOUNTING MOTORS AND ENCODERS
2.1.1 Mounting Rigidity and Noise Protection
The Dis series motor is controlled using only a feedback signal from
the rotary encoder. This means that if the mounting rigidity of the
rotary encoder is insufficient, a feedback signal can pick up noise such
as mechanical vibration, resulting in a problem such as degraded
precision and uncontrollability. Be sure to mount a rotary encoder
with a high rigidity so that it does not pick up peripheral vibration. Set
the rigidity (natural frequency) of the head mounting portion to 2 kHz
or more as a guideline. Moreover, ensure that a rotary encoder is
mounted with the specified precision.
If a feedback signal from the rotary encoder picks up noise from
another electric system, a problem similar to the problems mentioned
above can occur. Ensure that the feedback signal cable is sufficiently
shielded and grounded, and that the feedback signal cable does not run
cross or along with the motor power line. a
2.1.2 Dis series motor and Rotary encoder Directions
To drive a Dis series motor normally, the positive direction of the Dis
series motor and the positive direction of the rotary encoder must
atch each other. m
CAUTION
If the direction of the Dis series motor does not
match the direction of the rotary encoder, the motor
can become uncontrollable in the worst case. In
mechanical design and assembly, ensure the
matching of the directions.
Positive direction of Dis series motor
Positive direction of Dis series motor is, counterclockwise of rotor
viewing from power leads side.