Traxxas 4-Tec 2.0 Owner'S Manual Download

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18 • TRAXXAS

ADJUSTING THE ELECTRONIC SPEED CONTROL

VXL-3s Battery Settings (Low-Voltage Detection Setting)

The Velineon VXL-3s electronic speed control is equipped with built-in
Low-Voltage Detection. The Low-Voltage Detection circuitry constantly
monitors the battery voltage. When the battery voltage begins to reach the
minimum recommended discharge voltage threshold for LiPo battery packs,
the VXL-3s will limit the power output to 50% throttle. When the battery
voltage attempts to fall below the minimum threshold, the VXL-3s will shut
down all motor output. The LED on the speed control will slowly blink red,
indicating a low voltage shutdown. The VXL-3s will stay in this mode until a
fully charged battery is connected.
The VXL-3s speed control’s Low-Voltage Detection has been disabled for
best performance with NiMH batteries. The speed control’s LED will glow
red when it is turned on, indicating Low-Voltage Detection is disabled. Be
certain to activate Low-Voltage Detection if you install a LiPo battery in your
model.

Never use LiPo batteries while Low-Voltage Detection is disabled.

Verify that Low-Voltage Detection is DISABLED:

1.  Turn on the transmitter (with the throttle at neutral).
2.  Connect a fully charged battery pack to the VXL-3s.
3.  Press and release the EZ-Set button to turn the VXL-3s on. If the LED is solid

red, then the Low-Voltage Detection is DISABLED (not safe to use LiPo
batteries). If the LED is solid green, then Low-Voltage Detection is ACTIVATED.

To activate Low-Voltage Detection (LiPo setting):

1. Make sure the LED on the VXL-3s is on and red.
2. Press and hold the EZ-Set button for ten seconds.

The LED will turn off and then light green. Also, a
“rising” musical tone will be emitted from the motor.

3. Low-Voltage Detection is now ACTIVATED.

To disable Low-Voltage Detection (NiMH setting):

1. Make sure the LED on the VXL-3s is on and green.
2. Press and hold the EZ-Set button for ten seconds.

The LED will turn off and then light red. Also, a
“falling” musical tone will be emitted from the
motor.

3. Low-Voltage Detection is now DISABLED.

Transmitter Adjustments for the VXL-3s ESC

Before attempting to program your VXL-3s ESC, it is important to make sure that
your transmitter is properly adjusted (set back to the factory defaults). Otherwise,
you may not get the best performance from your speed control.

The transmitter should be adjusted as follows:

If the transmitter setting have been adjusted, reset them to the factory defaults.
1. Turn transmitter off.
2. Hold both MENU and SET.
3. Turn transmitter on.
4. Release MENU and SET. The transmitter LED will blink red.

5. Press SET to clear settings. The LED will turn solid green and the transmitter is

restored to default.

VXL-3s Setup Programming (Calibrating your ESC and transmitter)

Read through all of the programming steps before you begin. If you get lost
during programming or receive unexpected results, simply unplug the battery,
wait a few seconds, plug the battery back in, and start over.
1. Connect a fully charged battery pack to the VXL-3s.
2. Turn on the transmitter (with the throttle at neutral).
3. Press and hold the EZ-Set button (A). The LED will first turn

green and then red. Release the EZ-Set button.

4. When the LED blinks RED ONCE, pull the throttle

trigger to the full throttle position and hold it there
(B).

5. When the LED blinks RED TWICE, push the throttle

trigger to the full reverse and hold it there (C).

6. When the LED blinks GREEN ONCE, programming

is complete. The LED will then shine green or red
(depending on low-voltage detection setting)
indicating the VXL-3s is on and at neutral (D).

VXL-3s Operation

To operate the speed control and test programming, place
the vehicle on a stable block or stand so that all of the driven
wheels are off the ground. Disconnect motor wires “A” and “C” (see page 12),
this will assure the motor does not drive the wheels during testing. Do not test
programming without disconnecting the motor wires.
Note that in steps 1-7 below, Low-Voltage Detection is DISABLED (factory default)
and the LED shines red. If Low-Voltage Detection is ACTIVATED, the LED will shine
green instead of red in steps 1-7 below.

Never use LiPo batteries while Low-Voltage

Detection is disabled.

1. With the transmitter on, press and release the EZ-Set button. The LED will

shine red. This turns the VXL-3s on.

2. Apply forward throttle. The LED will turn off until full throttle power is reached.

At full throttle, the LED will illuminate red.

3. Move the trigger forward to apply the brakes. Note that braking control is fully

proportional. The LED will turn off until full braking power is reached. At full
brakes, the LED will illuminate red.

4. Return the throttle trigger to neutral. The LED will shine red.
5. Move the throttle trigger forward again to engage reverse (Profile #1). The LED

will turn off. Once full reverse power is reached, the LED will illuminate red.

6. To stop, return the throttle trigger to neutral. Note that there is programmed

delay when changing from reverse to forward. This prevents damage to the
transmission on high-traction surfaces.