Adjusting The Electronic Speed Control - Traxxas 1/16 Summit 7205 Owner's Manual

XL-2.5 ESC Specifications
Input Voltage: 4-8 Cells
(4.8V - 9.6V DC)
2S LiPo
Case Size
26.5 x 46.5 x 22mm
(W x D x H):
Weight: 33 Grams
Motor Limit
10-turns*
(380 Size):
On-Resistance
0.008 Ohms
(@Trans):
Reverse Delay: None
BEC Voltage: 6.0V DC
Power Wire: 16 Gauge / 40mm
Input Harness: 26 Gauge / 130mm
Motor Wires: 16 Gauge / 40mm
Transistor Type: MOSFET
PWM Frequency: 2300 Hz
*Properly geared
14 • 1/16 SUMMIT

ADJUSTING THE ELECTRONIC SPEED CONTROL

XL-2.5 Battery Settings (Low-Voltage Detection Setting)
The XL-2.5 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 XL-
2.5 will limit the power output to 50% throttle. When the battery voltage
attempts to fall below the minimum threshold, the XL-2.5 will shut down all
motor output. The LED on the speed control will slowly blink red, indicating a
low-voltage shutdown. The XL-2.5 will stay in this mode until a fully charged
battery is connected.
Your model includes a Power Cell NiMH battery. The XL-2.5 speed control's
Low-Voltage Detection has been disabled for best performance with this
battery. 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 LiPo batteries in your model.
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 XL-2.5.
3. Press and release the EZ-Set button to turn the XL-2.5 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 XL-2.5 is on and RED.
2. Press and hold the EZ-Set button (the
LED will turn off) (A). After ten seconds,
the motor will beep twice and the LED
will shine GREEN. Release the button (B).
3. Low-Voltage Detection is now ACTIVATED.
To disable Low-Voltage Detection (NiMH setting):
1. Make sure the LED on the XL-2.5 is on and GREEN.
2. Press and hold the EZ-Set button (the
LED will turn off) (A). After ten seconds,
the motor will beep three times and the
LED will shine RED. Release the button (B).
3. Low-Voltage Detection is now DISABLED.
Transmitter Adjustments for the XL-2.5 ESC
Before attempting to program your XL-2.5 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:
1. Set the throttle neutral switch to the 50/50 setting.
2. Set the throttle trim to the middle "0" setting. This adjusts the neutral position.
3. Set the Channel 2 servo reversing switch to the left position.
4. Do not change the position of any of the servo reversing switches after
programming the XL-2.5 ESC.
XL-2.5 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 pack in, and start over.
1. Disconnect one of the motor wires between the XL-2.5 and
the motor. This is a precaution to prevent runaway when
the speed control is turned on before it is programmed.
2. Connect a fully charged battery pack to the XL-2.5.
3. Turn on the transmitter (with the throttle at neutral).
4. Press and hold the EZ-Set button (A). The
LED will first turn green and then red.
Release the button.
5. When the LED blinks RED ONCE. Pull the
throttle trigger to the full throttle position
Never use LiPo batteries and hold it there (B).
6. When the LED blinks RED TWICE. Push the
throttle trigger to the full reverse and hold
it there (C).
7. 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 XL-2.5 is on and at neutral (D).
XL-2.5 Operation
To operate the speed control and test the programming, reconnect the motor
wires and place the vehicle on a stable block or stand so that all of the driven
A B
wheels are off the ground.
Note that in steps 1-8 below, Low-Voltage Detection is DISABLED (factory default)
and the LED shines red. If Low-Voltage Detection is ACTIVATED, the LED will shine
Red LED: Hold 10 seconds 2 Beeps: LED shines green
green instead of red in steps 1-8 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 XL-2.5 on. If you press and release too quickly, you
A B
may hear the steering servo jump but the LED may not stay on. Simply press
the button again until the LED shines RED and then release.
2. Apply forward throttle. The LED will turn off until full throttle power is
Green LED: Hold 10 seconds 3 Beeps: LED shines red
reached. At full throttle, the led will shine 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 shine 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 shine RED.
6. To stop, return the throttle trigger to neutral. Note that there is no
programmed delay when changing from reverse to forward. Use caution to
avoid slamming the speed control from reverse to forward. On high-traction
surfaces, this could result in transmission or driveline damage.
A
Green then Red
B
Once Red
C
Twice Red
D
Solid