4-1-4. Adjusting the moment of inertia of the load (f462)
The parameter for the adjustment of the moment of inertia of the load is effective in preventing a rapid
change in acceleration during acceleration or deceleration.
When a machine with a high-inertia load is accelerated or decelerated, speed may overshoot the
specified limit because of a change in acceleration, especially at acceleration and deceleration stop
The figures below show the relationship between the speed command during acceleration and the
setting of f462.
If you want to operate a machine with a low-inertia load at the highest possible acceleration/deceleration,
you can increase the response by setting f462 to 0.
4-2. How to switch speed control gains
During high-speed or low-speed operation, speed cannot be changed in some cases without changing the
speed control gain for reasons of machine characteristics. In such cases, use this gain switching function.
Gains are switched from one to the other when the frequency set with f466 is reached, as shown in the
f460 (Speed loop proportional gain)
f461 (Speed loop stabilization coefficient)
f462 (Moment of inertia of load 1)
f463 (Second speed loop proportional gain)
f464 (Second speed loop stabilization coefficient)
f465 (Moment of inertia of load 2)
f466 (Speed PI switching frequency)
Speed loop proportional gain
Speed loop stabilization coefficient
Moment of inertia of load 1
Speed control gain 1
Speed control gain 2
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