
B-65232EN/03 DESCRIPTIONS FOR FANUC AC SERVO MOTOR β series 4.SELECTING A MOTOR
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Condition 3
The frequency of positioning in rapid traverse satisfy to a desired
value.
The greater the frequency of positioning in rapid traverse, the
greater the ratio of acceleration time to the entire operation time.
This may overheat the motor. When the acceleration time
constant is increased according to the rapid traverse feedrate and
positioning frequency constant, the amount of produced heat
decreases in inverse proportion to the acceleration time constant.
Condition 4
If the load condition varies during a single cycle, the root-mean-
square value of the torques is smaller than or equal to the rated
torque.
Condition 5
The time for which the table can be moved (duty percentage and
ON time) is within a desired range.