22 • TRAXXAS
Your Traxxas transmitter has a programmable Multi-Function
knob that can be set to control various advanced transmitter
functions (set to Torque Control by default, see page 14). Accessing
the programming menu is done by using the menu and set
buttons on the transmitter and observing signals from the LED. An
explanation of the menu structure follows on page 25. Experiment
with the settings and features to see if they can improve your
driving experience.
Steering Sensitivity (Exponential)
The Multi-Function knob on the TQi transmitter can be
programmed to control Steering Sensitivity (also known as
exponential). The standard setting for Steering Sensitivity is
“normal (zero exponential),” with the dial full left in its range of
travel. This setting provides linear servo response: the steering
servo’s movement will correspond exactly with the input from
the transmitter’s steering wheel. Turning the knob clockwise from
center will result in “negative exponential” and decrease steering
sensitivity by making the servo less responsive near neutral, with
increasing sensitivity as the servo nears the limits of its travel range.
The farther you turn the knob, the more pronounced the change
in steering servo movement will be. The term “exponential” comes
from this effect; the servo’s travel changes exponentially relative
to the input from the steering wheel. The exponential effect is
indicated as a percentage—the greater the percentage, the greater
the effect. The illustrations below show how this works.
Normal Steering Sensitivity (0% exponential)
In this illustration, the steering servo’s travel (and with it,
the steering motion of the model’s front wheels)
corresponds precisely with the steering
wheel. The ranges are exaggerated
for illustrative purposes.
Decreased Steering Sensitivity (Negative Exponential)
By turning the Multi-Function knob clockwise, the steering
sensitivity of the model will be decreased. Note that a relatively
large amount of steering wheel travel results in a smaller amount of
servo travel. The farther you turn the knob, the more pronounced
the effect becomes. Decreased steering sensitivity may be helpful
when driving on low-traction surfaces and when driving at high
speed. The ranges are exaggerated for illustrative purposes.
Experiment! Try varying degrees of exponential. By default, the
model is set to 70% exponential. There’s no wrong way to adjust
exponential. Any setting that makes you more comfortable with
your car’s handling is the “right setting.”
Throttle Sensitivity (Throttle Exponential)
The Multi-Function knob can be set to control Throttle Sensitivity.
Throttle Sensitivity works the same way as Steering Sensitivity as
described above, but applies the effect to the throttle channel.
Only forward throttle is affected; brake/reverse travel remains linear
regardless of the Throttle Sensitivity setting.
Steering Percentage (Dual Rate)
The Multi-Function knob can be set to control the amount
(percentage) of servo travel applied to steering. Turning the Multi-
Function knob fully clockwise will deliver maximum steering throw;
turning the knob counterclockwise reduces steering throw (
Note
:
turning the dial counterclockwise to its stop will eliminate all servo
travel). Be aware that the steering End Point settings define the
servo’s maximum steering throw. If you set Steering Percentage
TQ
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ADVANCED TUNING GUIDE
Starting Over:
Restoring Factory Defaults
When programming your TQi
transmitter, you may feel the
need to start over with a clean
slate. Follow these simple steps
to restore the factory settings:
1. Turn the transmitter off.
2. Hold both MENU and SET.
3. Turn the transmitter on.
4. Release MENU and SET. The
transmitter LED will blink red.
5. Press MENU five times. The
LED will blink red 6 times
repeatedly.
6. Press SET to clear settings.
The LED will turn solid
green and the transmitter is
restored to default.
Turning Range
at Transmitter
Effective Turning
Range on Model
