
B-65382EN/02 HANDLING, DESIGN, AND ASSEMBLY 2.MECHANICAL DESIGN
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- Mitutoyo's absolute linear encoder AT353 (with the head movable)
The position where the "AT353" mark is provided on the main
encoder unit represents the positive direction.
Main linear encoder unit fixed
Head movable
Feedback cable
Positive
direction
Mitutoyo AT353
- Mitutoyo's absolute linear encoder AT353 (with the main linear encoder unit
movable)
The position where the "Mitutoyo" mark is provided on the main
encoder unit represents the positive direction.
Main linear encoder unit movable
Head fixed
Feedback cable
Positive
direction
Mitutoyo AT353
When the positive position of the motor does not match that of the linear
encoder
When the positive position of the motor cannot match that of the
linear encoder due to restrictions on machine design or other reasons,
reverse the positive direction of the motor by changing the phase order
of motor power lines. This enables the positive position of the motor
to match that of the linear encoder.
Normal connection Reverse the positive direction of the motor
Motor
Amplifier
U
V
W
U
V
W
Motor
Amplifier
U
V
W
U
V
W
NOTE
1 When connection was made with the phase order of
the power lines changed, normal connection may be
erroneously conducted during maintenance.
Therefore, take appropriate measures by, for
example, preparing dedicated power lines or
describing it explicitly in the maintenance manual of
the machine to prevent a failure.
2 This method can be applied only when the absolute
linear encoder is used. When the incremental linear
encoder is used, never use this method because
this direction may be different from that for the
magnetic pole sensor, probably making it
uncontrollable in the worst case.