Adjusting The Speed Control; Precautions - Traxxas E-Maxx 3906 Owner's Manual

Adjusting the Speed Control

The EVX electronic speed control installed in your E-Maxx has
been factory set and should not require any adjustments. The
EVX is a reliable and rugged reversible speed control for use with
two 6 or 7-cell battery packs and the stock Traxxas E-Maxx
motors.
The EVX has three user-selectable throttle profiles:
Profile #1: Forward with brakes and reverse: Novak's Smart
Braking ™ Circuitry brings the model to a slow speed before
engaging reverse to save your vehicle's gearbox and reduce
speed control heating. Forward and reverse are proportional.
Profile #2: Forward-only with brakes: Novak's Reverse Disable
Circuitry locks-out reverse for forward-only or racing use. Brakes
are enabled.
Profile #3: Forward with 25% reverse: For applications where
reduced speed in the reverse direction is desirable.
EVX Wiring Diagram - Follow this diagram exactly! The pos(+) and neg(-) battery
and motor inputs are not reversible.
BATTERY
BATTERY

Precautions

Follow these extra safety precautions for your protection and to
ensure long life for the EVX speed control.
Water and electronics don't mix! Do not operate model in or
around water. Never allow water, moisture, or other foreign
materials to get inside the speed control.
Disconnect the batteries. Always disconnect the battery
pack from the speed control when not in use.
Transmitter on first. Turn on your transmitter before the
speed control so you will have control of the radio
equipment.
Don't get burned! The transistor tabs and the heat sinks can
get extremely hot, so be careful not to touch them until they
cool. Supply adequate airflow for cooling.
Always use heat sinks. Three heat sinks are factory-installed
on the speed control and must be used for maximum cooling
and performance.
These additional precautions apply if the stock E-Maxx is
modified in the future. Please be aware that damage to the
speed control caused by modification of the E-Maxx or EVX will
not be covered by the warranty. This includes changing the
connectors.
Use stock connectors. If you decide to change the battery or
motor connectors, only change one battery or motor
connector at a time. This will prevent accidentally mis-wiring
the speed control. If the EVX is not wired exactly as shown in
the diagram, it can be damaged!
Use neutrally timed motors. The motors installed in the
E-Maxx are neutrally timed. If you replace the motors, the
motors must have 0° timing. Modified motors (with adjustable
end bells) timed to 0° or Johnson/ Mabuchi (closed end bell)
motors are recommended. Using motors with other than 0°
timing will draw excess current in reverse, causing the speed
control to overheat and premature motor wear.
Motor capacitors required! If the factory installed stock
motors are replaced, three 0.1µF (50V) ceramic capacitors
should be properly installed on every motor to prevent radio
interference. These capacitors are available from your hobby
dealer (Novak Kit #5620).
No reverse voltage! The speed control is not protected
against reverse polarity voltage. If changing the battery
and/or motor, be sure to install the same type of connectors
to avoid damage to the speed control. Removing the battery
connectors on the speed control or using the same-gender
connectors on the speed control will void the product's
warranty.
Don't let the transistor tabs touch! Never allow the
three separate transistor banks to touch each other or any
exposed metal. This will create a short circuit and damage the
speed control.
Insulate the wires. Always insulate exposed wiring with heat
shrink tubing to prevent short circuits.
Adjusting Your E-Maxx
speed control is capable of
handling 14 cells to power
the twin Titan motors. Only
use the 14 cell configuration
with the EVX and stock
Titan motors. For more
information on operating
the E-Maxx with 14 cells,
and complete 7 cell pack
assembly instructions, go to
www.Traxxas.com/7cell
Operating Your
E-Maxx on 14 Cells
The EVX electronic
25