OE Max Controls CSDJ Plus User Manual page 161

Regeneration
If the load inertia becomes larger, response of the load becomes
slower. Use the servo motor in inertia lower than the allowable load
inertia ratio of the motor. When using the load with inertia larger than
allowable one, connect a regeneration resistor, a regeneration unit, or
an auxiliary capacitor.
In order to operate excessive load inertia without error, handle as
stated below.
- Reduce the torque limit.
- Reduce the torque filter (SEt-06 value).
- Slow the acceleration and deceleration time.
- Reduce the motor speed.
Regenerative Energy
When the servo motor and drive are used in the following condition,
the energy may be transferred (regenerated) from the motor to the
servo drive.
1) When load moves vertically.
2) When acceleration and deceleration is repeated frequently.
3) When the load inertia is much bigger than the motor inertia.
4) When the acceleration and deceleration time is short and rotating in
high speed.
Fig 7.7 Regenerative Energy
7-9