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11
SERVO TRAVEL WITH AVC
TECHNOLOGY
AVC technology requires at least 80% travel on
steering and throttle in all directions to complete
calibration. If you have reduced travel to below 80%,
you must increase the travel above 80% to complete
calibration.
For vehicles with a mechanical brake, very little servo
travel is used to apply braking force. In this case it
is common to reduce throttle travel for braking well
below 80%. To calibrate a vehicle with a mechanical
brake, increase the brake travel above 80% whenever
the vehicle is calibrated (bound), then change the
braking travel back to the travel setting for your
brakes.
AUX CHANNELS AND AVC
TECHNOLOGY
When AVC is active, the SR6100AT receiver will use
the AUX 1 and AUX 2 channels for gain control. AUX
1 and AUX 2 should be allocated for AVC when AVC
is active. This is done automatically when the AVC
menu is selected in your transmitter, but if you are not
using the AVC menu, AUX1 or AUX2 should not be
used for other mixes or to control other applications
(servos, etc.)
The AUX 1 and AUX 2 ports can be used in AVC
mode to power a personal transponder, lights, drive
servos, or operate auxiliary devices. However, AUX 1
will command steering gain, and AUX 2 will command
throttle gain regardless of what is plugged into the
AUX 1 or AUX 2 ports. AUX 1 and AUX 2 are not
independent when AVC is active. For an independent
channel, use AUX 3 or 4.
TIP: Using the SR6100AT receiver without the AVC
menu on your transmitter or using AUX 1 or AUX 2 to
command auxiliary functions may result in poor AVC
performance.
• If 5.5ms frame rate is selected in the transmitter,
only two channels, Steering and Throttle, are
operational. The Aux channels can be used to
power a personal transponder or lights.
• If a frame rate other than 5.5ms is selected,
the Aux channels will operate as extra servo
channels.
AVC TECHNOLOGY SETUP
For the best AVC performance, use the AVC menu on
your Spektrum transmitter to tune and manage AVC
settings.
Order of operations for AVC setup
1.
Install the receiver in your vehicle
2.
Bind the vehicle and complete the calibration
procedure.
3.
Set up servo sub trim, reversing and travel to suit
your vehicle.
4.
Re-bind and complete calibration again so calibration
matches the model setup.
5.
Drive the vehicle with no gain on AVC settings to
verify your travel and other basic settings. If any
changes are made re-bind and re-calibrate.
6.
Follow the AVC tuning procedure in this manual.
AVC TUNING
A value from 0 to 100 is used for three settings that
affect tuning; steering gain, throttle gain, and priority.
These values configure 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.
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 fishtails due to wheel-spin,
increase the throttle gain.
• If the vehicle wobbles (oscillates), reduce the
steering gain.
• Once you find the highest steering gain values
that don’t cause 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.
AVC TECHNOLOGY SETUP
For the best AVC performance, use the AVC menu on
your Spektrum transmitter to tune and manage AVC
settings.
Order of operations for AVC setup
1.
Install the receiver in your vehicle
2.
Bind the vehicle and complete the calibration
procedure.
3.
Set up servo sub trim, reversing and travel to suit
your vehicle.
4.
Re-bind and complete calibration again so calibration
matches the model setup.
5.
Drive the vehicle with no gain on AVC settings to
verify your travel and other basic settings. If any
changes are made re-bind and re-calibrate.
6.
Follow the AVC tuning procedure in this manual.
SERVO TRAVEL WITH AVC
TECHNOLOGY
AVC technology requires at least 80% travel on
steering and throttle in all directions to complete
calibration. If you have reduced travel to below 80%,
you must increase the travel above 80% to complete
calibration.
For vehicles with a mechanical brake, very little servo
travel is used to apply braking force. In this case it
is common to reduce throttle travel for braking well
below 80%. To calibrate a vehicle with a mechanical
brake, increase the brake travel above 80% whenever
the vehicle is calibrated (bound), then change the
braking travel back to the travel setting for your
brakes.
AUX CHANNELS AND AVC
TECHNOLOGY
When AVC is active, the SR6100AT receiver will use
the AUX 1 and AUX 2 channels for gain control. AUX
1 and AUX 2 should be allocated for AVC when AVC
is active. This is done automatically when the AVC
menu is selected in your transmitter, but if you are not
using the AVC menu, AUX1 or AUX2 should not be
used for other mixes or to control other applications
(servos, etc.)
The AUX 1 and AUX 2 ports can be used in AVC
mode to power a personal transponder, lights, drive
servos, or operate auxiliary devices. However, AUX 1
will command steering gain, and AUX 2 will command
throttle gain regardless of what is plugged into the
AUX 1 or AUX 2 ports. AUX 1 and AUX 2 are not
independent when AVC is active. For an independent
channel, use AUX 3 or 4.
TIP: Using the SR6100AT receiver without the AVC
menu on your transmitter or using AUX 1 or AUX 2 to
command auxiliary functions may result in poor AVC
performance.
• If 5.5ms frame rate is selected in the transmitter,
only two channels, Steering and Throttle, are
operational. The Aux channels can be used to
power a personal transponder or lights.
• If a frame rate other than 5.5ms is selected,
the Aux channels will operate as extra servo
channels.
DISABLING AVC TECHNOLOGY
AVC may be disabled during binding.
1.
Connect power to the receiver and quickly press
and release the bind button three times (within 1.5
seconds).
2.
Press and hold the bind button and to put the
receiver in bind mode. release the buton when the
LED starts to flash rapidly, indicating it is in bind
mode.
When the AVC system has been disabled, the LED
on the receiver will show three flashes upon power
up, and then remain lit. The receiver is bound
and operating normally when the LED remains
illuminated.
TIP:
If the AVC feature in the receiver is active and the
AVC menu in the transmitter is Inhibited, AVC functions
will default to the AUX 1 and AUX 2 operation, and in
this scenario, AVC will not work correctly.
Selecting INH in the AVC menu on your
transmitter will not disable AVC.