Mitsubishi Electric MR-J4W2-0303B6 Instruction Manual page 367

16. FULLY CLOSED LOOP SYSTEM
The following table shows the functions of each control mode.
Control
Semi closed loop control
Dual feedback control
Fully closed loop control
Feature Position is controlled according to the servo motor-side data.
Since this control is insusceptible to machine influence (such as machine resonance),
Advantage
the gains of the servo amplifier can be raised and the settling time shortened.
If the servo motor side is at a stop, the side may be vibrating or the load-side accuracy
Disadvantage
not obtained.
Feature Position is controlled according to the servo motor-side data and load-side data.
Control is performed according to the servo motor-side data during operation, and
Advantage according to the load side-data at a stop in sequence to raise the gains during
operation and shorten the settling time. A stop is made with the load-side accuracy.
Feature Position is controlled according to the load-side data.
Advantage The load-side accuracy is obtained not only at a stop but also during operation.
Since this control is susceptible to machine resonance or other influences, the gains
Disadvantage
of the servo amplifier may not rise.
Description
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