19
SPEKTRUM DX5• TRANSMITTER INSTRUCTION MANUAL
EN
AVC TUNING
A value from 0 to 100 is used for three settings that affect tuning;
steering gain, throttle gain, and priority. These values confi gure the
receiver to your vehicle so you can tune it for optimal performance based
on your driving style. It is normal for gain and priority tuning results to
vary.
WHAT IS GAIN?
A gain value of 0 will result in zero electronic corrections, and a gain of 100
will result in large corrections in an effort to hold a straight line.
• Steering gain tells the receiver how strongly to assist steering when
the vehicle begins to spin out of control.
• Throttle gain manages how much the receiver can ease off the
throttle when the vehicle begins to spin out of control.
The default gain values in Spektrum transmitter AVC menus are set at
50. We recommend adjusting gain values 5 points at a time. Fine tune
the settings with smaller increments as desired performance is achieved.
Avoid large increases to steering gain values between tests.
WHAT IS PRIORITY?
Priority tells the receiver how much you want to be able to override the
electronic stability with your steering commands. A low priority means
AVC will make steering corrections when you turn the wheel all the way.
A high priority will reduce AVC the more you turn the wheel.
The default priority value in Spektrum transmitter AVC menus is 100. This
means when you turn the steering wheel to the limit, the gain is reduced
to zero. This value will work well for a majority of drivers.
WHAT IS HEADING HOLD?
Heading hold maintains the vehicle’s direction. It is normal to see the
wheels steer in the same direction the vehicle was last pointed. If a
vehicle with AVC technology is lifted off the ground and turned from
side to side, the wheels will steer in an effort to get back to the original
heading. When driving, heading hold only works when the steering wheel
is left straight. The moment you begin to turn the wheel, heading hold
turns off. When the wheel is re-centered, heading hold is turned back on
and is set to the new heading.
AVC TUNING PROCEDURE
1.
With the transmitter and receiver already bound and properly
calibrated, turn on the transmitter and vehicle.
2.
Apply throttle, do not turn the steering wheel, and observe how well
the vehicle can maintain a straight line at high speed.
• If the vehicle does not make enough steering corrections to
maintain a straight line, increase the steering gain.
• If the vehicle fi shtails due to wheel-spin, increase the throttle gain.
• If the vehicle wobbles (oscillates), reduce the steering gain.
• Once you fi nd the highest steering gain values that prevent
oscillations at high speed, use those numbers as your steering
gain limit and don’t go any higher.
3.
Drive the vehicle through accelerated turns and observe how it
responds.
• If the vehicle slows down going into a turn, reduce the throttle gain.
• To allow the vehicle to slide more with intentional wheel-spin,
reduce the throttle gain.
• To improve traction in slick conditions, increase throttle gain.
• If the vehicle won’t turn-in, increase the priority.
• If the vehicle spins out, there are two tuning options to consider;
1. Increasing throttle gain will give the receiver more authority to
reduce throttle when the vehicle begins to spin out.
2. Reducing priority will give the receiver more authority to help
correct oversteer.
GENERAL AVC TUNING TIPS
For beginner drivers, low grip conditions, and vehicles with excessive
power, more gain will be helpful.
For terrain with more grip and increased speeds, tuning will result in
lower steering gain values.
CHANGING BATTERY VOLTAGE WHEN USING AVC
If you increase voltage going to your vehicle, the maximum steering gain
setting will have to be reduced.
At the same time, when increasing voltage increased throttle gain will
help manage the extra power.
For example: If a truck set up for 2S is upgraded to 3S, the truck may oscillate
at high speeds on 3S, requiring steering gain to be reduced. Throttle gain will
have a bigger effect on 3S, so increasing throttle gain may be benefi cial.
AVC TROUBLESHOOTING GUIDE
PROBLEM
POSSIBLE CAUSE
SOLUTION
Vehicle Oscillates
(wobbles or
shakes) at high
speeds
Steering gain is too
high
Reduce steering
gain
Vehicle responds
strangely to
controls
Receiver not prop-
erly calibrated
Confi rm servo
direction and
travel are correct,
then re-bind and
re-calibrate the
receiver
Vehicle setup
changed after
calibration
Receiver not
mounted level
Confi rm the receiver
is truly fl at, it cannot
be mounted at an
odd angle.
Receiver won’t
fi nish the calibra-
tion
Travel adjust is below
80% on steering or
throttle
Increase travel ad-
just and recalibrate.
See page 19 for
more information
about setting up
vehicles with a
mechanical brake.
Driver expects
AVC should be
turned off, but it
is still turned on
AVC menu is
inhibited, but
AUX values are
at neutral, which
works out to 50%
gain but with no
priority.
Disable AVC during
binding, or change
AVC menu to ON
and set all gain
values to 0
Second bind plug
to disable AVC
was inserted after
binding
Re-bind with the
second bind plug in
the disable port
