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Sonoda Newly designed
Tandem Disturbance
Elimination Control
Specification Manual
B-65150E/04--0012
5. Tuning procedure
1. Tune the integral gain Ki after Tandem Disturbance Elimination Control function gets valid.
2. First of all, observe the oscillation of torque command both Main-axis and Sub-axis by using the
digital check-board.
3. If the oscillation phase of torque command is shifted about 180 degree each other, the oscillation
must be caused by the interference between Main-axis and Sub-axis.
4. Observe the oscillation increasing the integral gain Ki step by step from zero.
5. The integral gain Ki exists the most suitable value for each machine. If it is set over the suitable
value, the oscillation must become bigger.
6. When the velocity gain is increased furthermore, the frequency of oscillation may shift to different
frequency. Then tune the integral gain Ki again to suppress it.
7. As against the oscillation frequency over 100Hz, this function isn’t effective. However this
function will become effective by using Current Loop 1/2PI function in order to make gain up for
current loop.
6. Cautions for 90B3, 90B7 series
These servo software series are used for the specific applications, which require Learning Control. In
the rotary axes (C1–C2) which require Position Tandem Control, Tandem Disturbance Elimination
Control of these servo software series is available with the mechanism that can release the
connection between Main-axis and Sub-axis. In this case, this function becomes effective only when
each axes are connected mechanically. Therefore the external signal G139 (called the connection
flag) is required in order to judge whether each axes are connected mechanically or not. Concerning
the details of external signal interface, refer to “Tandem Learning Control function” in “Learning
Control Operator’s Manual” (A-63639E-034).