7
EN
LOSI
®
TENACITY
™
LASERNUT ULTRA 4 1/10 4WD RTR ROCK RACER • INSTRUCTION MANUAL
DESCRIPTIONS
1. Running Mode
-
Forward Only with Brake
Intended for competition use, this mode allows only forward and brake controls.
-
Forward/Reverse with Brake
This mode is the basic all-around mode, allowing forward, reverse and brake controls.
To engage reverse while moving forward, apply the brake until the vehicle has come to
a complete stop, release brake, then apply the brake again. While braking or in reverse,
engaging the throttle will result in the vehicle immediately accelerating forward.
2. Drag Brake Force
Adjusts the amount of brake automatically applied when the throttle is returned to the
neutral position. This simulates the engine braking effect of a full-scale vehicle, allowing
improved turn-in and your vehicle’s general response to controls.
3. Low Voltage Cutoff
This function helps to prevent battery over-discharge. The ESC continuously monitors the
battery’s voltage. If the voltage falls below the voltage threshold for 2 seconds, the output
power shuts off and the red LED flashes twice repeatedly.
The cutoff threshold calculation is based on individual Li-Po cell voltage. For Ni-MH batteries,
if the voltage battery pack is higher than 9.0V, it will be treated as a 3-cell Li-Po battery
pack; if it is lower than 9.0V, it will be treated as a 2-cell Li-Po battery pack. Example: for a
8.0V Ni-MH battery pack used with a 2.6V/cell threshold, it will be treated as a 2-cell Li-Po
battery pack and the low-voltage cut-off threshold will be 5.2V (2.6x2=5.2).
4. Start Mode (Punch)
Sets the initial throttle punch when the car accelerates. Level 1 gives
a very soft initial acceleration and level 4 gives a stronger initial acceleration.
5. Max Brake Force
Adjusts the maximum braking force. A higher value provides stronger braking,
but can also cause the wheels to lock, resulting in loss of control of the car.
6. Max Reverse Force
This parameter adjusts the maximum power when travelling in reverse.
7. Initial Brake Force (minimum brake)
Adjusts the minimum amount of braking power when the brakes engage. The default value
is equal to the drag brake value. A high value can lock the wheels when the brake is used.
8. Neutral Range
Adjusts the throttle sensitivity around the neutral point. A higher value results in the
throttle having to be moved more for the vehicle to move forward, backward or brake.
9. Timing
Adjusts the motor drive current timing. More timing gives more performance, but can
lower efficiency and cause damage to the motor and/or ESC by overload or overheating.
NOTICE:
Always ensure the motor timing is set correctly. Failure to set the motor timing
correctly can result in damage to the motor and ESC. Refer to the manufacturer instructions
for recommended timing settings.
10. Motor Type
11. Motor Rotation
Allows you to make this change in the ESC so no wires need to be changed between the
ESC and the motor.
12. Li-Po Cells
Allows the ESC to automatically detect or manually set the number of cells in your Li-Po
battery back.
Default Settings
ESC FUNCTIONS AND MODES
The ESC includes programming options so you can adjust the way your vehicle performs. Refer to the included programming table to adjust the ESC for your driving conditions.
PROGRAMMING TABLE
PROGRAMMING VALUE
PROGRAMMING ITEMS
1
2
3
4
5
6
7
8
9
1. Running Mode
Forward w/ brake
Forward/Reverse
w/ brake
Forward/Reverse
2. Drag Brake Force
0%
5%
10%
20%
40%
60%
80%
100%
3. Low Voltage Cutoff
non-protection
2.6V/Cell
2.8V/Cell
3.0V/Cell
3.2V/Cell
3.4V/Cell
4. Start Mode
Level 1
Level 2
Level 3
Level 4
Level 5
Level 6
Level 7
Level 8
Level 9
5. Max Brake Force
25%
50%
75%
100%
disable
6. Max Reverse Force
25%
50%
75%
100%
7. Initial Brake Force
= Drag Brake
0%
20%
40%
8. Neutral Range
6% (Narrow)
9% (Normal)
12% (Wide)
9. Timing
0.00º
3.75º
7.50º
11.25º
15.00º
18.75º
22.50º
26.25º
10. Motor Rotation
Counterclockwise
Clockwise
11. Li-Po Cells
Auto Calculate
2 Cells
3 Cells
4 Cells
5 Cells
6 Cells
ESC PROGRAMMING PROCEDURE
Programming is accomplished using the SET button on the ON/OFF switch*.
1. Connect a fully charged battery to the ESC.
2. Power on the transmitter.
3. Power on the ESC.
4. Hold the SET button until the green LED flashes. Release the set button to enter
programming mode.
TIP:
To reset all programming items to the default values, press and hold the set button for
five seconds
5. Press and release the set button as needed to cycle through the programming items. The
number of times the green LED flashes equals the programming item number given in the
programming table.
6. When at the desired programming item, press and hold the set button until the red LED
flashes to select the item.
7. Press and release the SET button to cycle through the values available for the programming
item based on the number of times the LED flashes. Refer to the programming table.
8. Save the setting by pressing and holding the SET button for 3 seconds.
9. Power off the ESC to exit programming mode or to change other programming items.
* Other programming options include the Spektrum SMART Firma ESC Programming Box (SPMXCA200) and the SmartLink USB updating and programmer application. See SpektrumRC.com for
more details about Spektrum SMART Firma ESCs.
