SRV. SPEED – SERVO SPEED
A33
The XP9303 system provides the ability to adjust the
speed of servos on each channel in both directions. The
speed may be adjusted downward (servo slowed) from its
normal speed but it cannot cause a servo to move faster
than its rated specifications. Furthermore, each servo can
have 2 sets of speeds in both directions that are Flight
Mode or switch selectable.
The servo speed function is very useful for scale models
with retractable landing gear and gear doors, since in
many instances the need for gear door sequencers can be
eliminated. If the gear door servos move at normal speed
and the landing gear servos move at a slower speed when
the gear is lowered, the gear doors will be open before
the landing gear begins to come down. In the opposite
direction, if the gear door servos move slowly and the
landing gear servos move at normal speed, the gear can
retract before the gear doors begin to close.
Servo speed can also be useful on the throttle channel.
The throttle servo can be slowed down such that the
engine will not flameout because the carburetor is opened
or closed too quickly when the throttle stick is jammed
from low to high and vise versa.
To adjust servo speed, highlight and select SRV. Speed
in the FUNC.LIST.
1. If there is to be a single set of servo speeds that are in
effect all of the time, make sure the display is showing
Pos0. If it is not, select Pos1 and change it to Pos0.
Highlight and select the channel and direction for each
servo that is to be adjusted. Once a direction for a servo is
selected, the servo speed may be set so the servo travels
from .176 seconds for 60 degrees of rotation all the way
up to 15 seconds for 60 degrees of rotation. Adjust the
speed of each servo until the desired speed is obtained.
The example below shows the throttle servo slowed down
so that it traverses 60 degrees in 1.25 seconds in both
directions. That is all that is required when there is only 1
set of servos speeds. Continue with the next topic.
2. At this point it is assumed that there are to be 2 sets of
servo speeds that are Flight Mode or switch selectable.
If one set of values is set to NORM for all channels,
slowing of servos can be turned off by selecting the
position (Pos0 or Pos1) that has the NORM values.
Highlight and select Pos0 and change it to Pos1 and
then highlight and select the channel and direction
for each servo that is to be adjusted. Once a direction
for a servo is selected, the servo speed may be set so
the servo travels from .176 seconds for 60 degrees of
rotation all the way up to 15 seconds for 60 degrees
of rotation. Adjust the speed of each servo until the
desired speed is obtained. Highlight and select Pos0
and then highlight and select the channel and direction
for each servo that is to be adjusted. Switch between
Pos0 and Pos1 to view and adjust the 2 sets of
values for each servo.
3. Scroll over to and select SW SELECT to identify
the Flight Mode and/or switch(es) that is to be used
to switch between the 2 sets of servo speeds. The
throttle may also be used to switch between differential
settings by highlighting and selecting THRO STK and
setting the percentage of throttle to the point where the
values are switched.
Note: Pos1 always has priority over Pos0. In
other words, if multiple switches are selected and
one of the switches is in its Pos1 position, then
all other switches are ignored and the Pos1 values
are in effect.
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