FUTABA 6K Instruction Manual page 89

BOST ▶ [ Boost ]
The minimum current applied to the internal motor when starting the servo can be set. Since
a small travel does not start the motor, it essentially feels like the dead band was expanded.
The motor can be immediately started by adjusting the minimum current which can start the
motor.
[Relationship between boost set value and servo operation]
Small → Motor reacts to a minute current and operation becomes smooth.
Large → Initial response improves and output torque increases. However, if the torque is too
large, operation will become rough.
DAMP ▶ [ Damper ]
The characteristic when the servo is stopped can be set.
When smaller than the standard value, the characteristic becomes an overshoot
characteristic. If the value is larger than the standard value, the brake is applied before the
stop position.
Especially, when a large load is applied, overshoot, etc. are suppressed by inertia and hunting
may occur, depending on the conditions. If hunting (phenomena which cause the servo
to oscillate) occurs even though the Dead Band, Stretcher, Boost and other parameters are
suitable, adjust this parameter to a value larger than the initial value.
[Relationship between damper set value and servo operation]
Small → When you want to overshoot. Set so that hunting does not occur.
Large → When you want to operate so that braking is not applied. However, it will feel like
the servo response has worsened.
(Note) If used in the hunting state, not only will the current consumption increase, but the
life of the servo will also be shortened.
BSTM ▶ ON/OFF
OFF : It is the boost ON at the time of low-speed operation.(In the case of usual)
ON : It is always the boost ON.(When quick operation is hope)
SPED ▶ [ Speed Control ]
Speeds can be matched by specifying the operating speed. The speed of multiple servos can
be matched without being affected by motor fluctuations. This is effective for load torques
below the maximum torque.
However, note that the maximum speed will not be exceed what the servo is capable of even
if the servos operating voltage is increased.
STAR ▶ [ Soft Start ]
Restricts operation in the specified direction the instant the power is turned on. By using this
setting, the first initial movement when the power is turned on slowly moves the servo to the
specified position.
SMOT ▶ [ Smoother ]
This function changes smoothness of the servo operation relative to stick movement
changes. Smooth setting is used for normal flight. Select the "OFF" mode when quick
operation is necessary such as 3D.
[ Boost ON/OFF ]
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