Digital Speed Controller Instruction Manual

Digital Speed Controller
Instruction Manual
Precautions
Ni-Cd batteries
WARNINGTo avoid the risk of fumes, fire and burns

Improper use of the Ni-Cd battery is very dangerous. The battery mustbe handled carefully. Incorrect wiring or short-circuiting of wiring may
cause fire or fumes. Before connecting or disconnecting the battery to orfrom the ESC, be sure to turn off the power switch of the ESC.
When the battery is not in use, disconnect it from the ESC or charger,
and store it in a suitable location with wires and screws removed.

Connecting silicone wiring
WARNINGTo avoid the risk of fumes, fire and burns

Incorrect wiring may cause fire or fumes that can damage both the ESC
and battery beyond repair. To avoid the risk of accidents, do not modify
wiring by yourself, even though the ESC is fitted with terminals. Take theproduct to KEYENCE instead.

Connecting to a motor
WARNINGTo avoid the risk of fumes, fire and burns

Make sure to fit the included capacitor to the motor to be used.
Otherwise, the ESC may become damaged due to malfunction resulting
from electrical noise.

2Caution
Make sure to carefully read and understand the important warning
messages in this Instruction Manual before commencing to use theproduct.
WARNING Information for preventing serious injury
CAUTION

Information for preventing accidents or
product damage

NOTE

Useful information on handling the productRadiating fins
To avoid the risk of fumes, fire and burns
WARNING
Electricity flows through the metal upper part of the ESC. Therefore, takecare to avoid contacting this with conductors and other metal parts orthe carbon chassis of the ESC. Take the same care even after aradiating fin is installed, since radiating fins conduct electricity.

Proper operation
To prevent accidents and product damage
CAUTION
Do not modify the ESC in any way. Use it only for its intended purpose.
Keep the ESC away from flames or heat. Avoid splashing any liquid,
such as water, on the ESC.

3

Features• The RAPIDA series feature the latest MOS-FET (SOP) components,
which allow powerful braking as well as a forward function.
• Advanced control circuitry using a 4-layer board that allows
high-density mounting of electronic components.
• Utilizes an MPRS*1 system, which has proved very successful in the
A-01 Series in large-current circuits, for compactness andhigh-performance.
• With AGCS*2, Schottky diodes are no longer necessary, and motor
voltage loss during pulse drive is reduced to approximately 1 percent.
This results in a longer run-time and prevents the heat generated by
FETs.
• Smooth frequency control allows settings to be adjusted flexibly.
• AWG14 silicone cables, for flexibility and large currents• Gold-plating is used for all electrical connectors for extremely low
contact resistance.
• Outstanding energy-saving performance can be achieved by setting
the power limiter function to an appropriate value.
• Includes a high-capacity state-of-the-art low impedance capacitor tominimize electrical noise.
• Improved throttle output resolution for more stable operation.

RAPIDA• The ZERO offers 20 high-performance surface-mounted FETs thatgive an ON-resistance value of 0.41 mΩ (FET standard value),amongst the lowest in the world.
• You can choose four settings for brake frequency to adjust the"braking feel" to just how you like it.
• You can switch neutral brake ON/OFF.
• By setting the power limit to an appropriate value, you can drive verysmoothly.
• The uses trimmer specifications for simple operation.

RAPIDA PRO• The RAPIDA PRO offers 24 high-performance surface-mounted FETs
, for an ON-resistance of 0.34 mΩ, the lowest in the world.
• With the addition of an indicator function, a variety of settings andmeasurement can be made easily using only the body of the ESC.
• Equipped with a variety of measuring functions for visual confirmationof optimum settings.
• Improved receiver and servo power allow the RAPIDA PRO to handle
high torque servo.

4*1 AGCS: Advanced Gate Control System
AGCS is a groundbreaking system that dramatically reduces losses during
pulse drive by dynamically controlling FET gates (ON-OFF) according to motor
speed (RPM). (PATENT PENDING)*2 MPRS: Metal Plate Radiation (of Heat) Structure
MPRS is a hybrid structure in which current is conducted not through a copper
foil on the printed board but through a metal plate, for optimum configurationof FETs.

Specifications• RAPIDAPower supply
Maximum current
ON resistanceCompatible motors
Dimensions
Weight (ESC unit)
Regulator for receiver/servo

6-cell NiCd battery
Max. current of NiCd battery
0.41 mΩ (FET standard)
any
W37.4 x D27.5 x H18.0 (excl. projection)
29.6 g
6V 3A output• RAPIDA PRO
Power supply
Maximum current
ON resistanceCompatible motors
Dimensions
Weight (ESC unit)
Regulator for receiver/servo

6-cell NiCd battery
Max. current of NiCd battery
0.34 mΩ (FET standard)
any
W37.4 x D27.5 x H18.0 (excl. projection)
29.6 g
6V 3A output

5

Part names and wiring
Part names• RAPIDA
Brake rate

Power limit

Drive frequency
Aluminum top seal

1

2

3

Rx connector

Power switch
Function switch left
Function switch middle(effectively presses both left andright buttons at the same time)

Function switch right• RAPIDA PRO
Bar LED

Aluminum top seal

1

2

3

Rx connector

7-segment LED

Power switch
Function switch left
Function switch middle(effectively presses both left andright buttons at the same time)

6

Function switch rightWiringWARNINGTo avoid the risk of fumes, fire and burns

Take care not to make mistakes with battery polarity. Also, make sure toconnect the included noise-suppression capacitor to the motor. If not, you
may damage the ESC.

• Using connectors
Battery
Connect to NiCd and NiMH batteries
Connect included
capacitor to themotor as shown inthe diagram below.

Motor
Connect to a motor• Without connectors

Battery

2

MOT
1

3

BAT

Motor
Capacitor
BAT
MOT

Do not attempt to change wiringby yourself.

Connect the included capacitor tothe motor as shown in the diagram.

7

Part names and wiring
Rx connector
WARNING To avoid the risk of fumes, fire and burns
Do not change wiring before disconnecting the NiCd battery. Also, take care
not to make mistakes with the polarity of wiring, otherwise you may damage
the ESC, receiver or servo. Take particular care of the servo and receiver
since these cannot be repaired by ACUVANCE.
Insert the Rx connector pin according to the directions of the maker of thereceiver you are going to use. Connect carefully, making sure to properly orient
connectors to secure the connector pin.
Connecting cables incorrectly or inserting connectors in reverse may cause
damage to the servo and receiver.
If you use a receiver manufactured by a maker other than the manufacturers
listed above, contact your distributor or ACUVANCE.
Receivermanufacturer

Old SANWA
Old KO

Shape ofconnector insert
port(receiver side)

Take care not toinsert in reverse.

FUTABANew KONo need tochange it.

New SANWA (Z connector)
JR
Take care not toinsert in reverse.

WiringCut here.
White

Cut here.
Red

To lock connection, the connector has barbs
inside. (Not on the metal contacts.) Whenyou pull cables out of the connector, you
should lift the connector's lip by using sharp
point like cutter or needle and pull out. When
you insert, you should turn its concave side
up and push it to the depth of "snap".

CAUTION8

Be cautious when you
handle needle or cutter.

Black

White

Insert this side up

9Setting up Functions
Transmitter settings
WARNING

Before performing settings for each function,
make sure to disconnect the motor or to keep the vehicle
suspended in the air.

the left and right function
1 Press
switches together for four seconds.

2 Red and green LED blink.
transmitter to the neutral position
3 Set
and press the right function switch.

4 Green LED blinks.
Set transmitter to the high point

and press the right function
5 position
switch.

6 Red LED blinks.
Set the transmitter to the brake

point position and press the
7 highright function switch.
Settings are complete and the redgreen LED blink at the neutral
8 andposition.
As you grip the throttle, the LED

off once, then the green LED
9 goesturns on at the high point position.

10

10

When you adjust the throttle to thebrake side, the LED goes off once,
then the red LED turns on at thebrake high point position.

Brake frequency settings
the left function switch for
1 Pressfour seconds.

2

The display passes through fourstages from the turning off of thegreen LED to the turning on of thegreen LED, according to the current
brake frequency.
Set the frequency you want byusing the right function switch.

3

Frequency
2 kHz
4 kHz
6 kHz
8 kHz

Green LED
Off
Blinking
Blinking
On

Brake feel
Strong brake operation
Slow
Fast
Smooth brake operationpress the left function switch
4 Iftheyoufrequency
is set and recovered.

11Setting up Functions
Neutral brake settings
WARNING

Before performing settings for each function,
make sure to disconnect the motor or to keep the vehicle
suspended in the air.

1 Turn off the ESC power switch once.
on the power switch while
2 Turnpressing the right button.

3

The neutral brake is ON when the
ESC returns to normal operation
while the red LED is blinking.
The neutral brake is OFF when the
ESC returns to normal operation
while the green LED is blinking.

Red LED= ON

Green LED= OFF

4 By repeating this same action, the neutral brake switches ON and OFF in turn.
5 Since the mode is registered, there is no need to reset it.

12Frequency adjustment function
NOTE

Trimmer can only rotate 240 degrees.
Do not try to force it more than this.

Frequency
adjustment trimmer• You can adjust the frequency from 1 kHz to
15kHz, according to the "feel" you desire.
• For full-torque driving, set the frequency to arather low value.
• For smoother driving, set the frequency to ahigher value.
• By changing the position of the trimmer, thefrequency changes to linear adjustment,
allowing more detailed settings.

Power limit adjustment function
NOTE

Trimmer can only rotate 240 degrees.
Do not try to force it more than this.
• By adjustment the power limit, it is possible
to drive on slippery surfaces and to extend
the run-time of the vehicle.
Power

Power limit
adjustment trimmer

Trimmer 100%

100%

50%

Trimmer 50%

Time• The higher the power limit value (closer to100%), the higher the electric current thatflows in the motor.
• Lowering the trimmer value effectively
controls the starting up power and the levelof traction. Lowering the trimmer value also
extends the run-time.

13

Setting up Functions
Dash power mode
NOTE

If the ESC is subject to electrical noise, there is a danger
that the noise is interpreted as the first throttle action,
thereby deactivating dash power mode by mistake.

This function can be used to override the power limit
for the first throttle action at the time of starting up.
This allows faster starting up.
1. Turn the transmitter switch on and press the left and right function switches
together for four seconds.
The LED then starts blinking. (Same as setting mode.)

2. Lift your hand from the function switch and wait until the LED stops blinking.
(For 10 seconds) LED blinks red and green in turn.
The ESC is then in dash power mode.

Brake rate adjustment function
NOTE

Trimmer can only rotate 240 degrees.
Do not try to force it more than this.

Driving can be made smoother by
setting the brake adjustment value
according to the specific roadconditions.
Brake rate adjustment trimmer
Brake
amount100%• Adjusting the brake rate can result in higher
torque braking.

Max. brake adjustment

Brake
amount100%

Min. brake adjustment

Max. brake adjustment

Min. brake adjustment

Brake trigger amount0%
NeutralBrake

Brake high point

Operation without neutral brake

Brake trigger amount0%
NeutralBrake

Brake high point

Operation with neutral brake

When in normal operation (no neutral brake), the minimum brake value can be adjusted bychanging the brake adjustment trimmer. At the minimum setting, the brake value changes
linearly according to the trigger value. As the setting reaches a maximum, the minimum brakevalue changes up to about 70% of the maximum brake value. If you need stronger braking thanthis, set to the appropriate value by gradually increasing the setting from the minimum value.

14

Energy Saving Mode (Abbrev. EnSA)
1. Turn off the amplifier power switch once.
2. Press and hold the left button while turning on the power switch.

3. If the unit returns to normal operation with the red or green LED flashing,
the Energy Saving Mode is on. If the unit returns to normal operation withthe red or green LED illuminated, the Energy Saving Mode is off.

4. Repeating steps 1 and 2 turns the neutral brake on and off alternately.
5. The mode once set is stored in memory, so you donÅft have to set
the same mode again.

Energy Saving Mode
ON

OFF

OFF

Green
ﬂashes

Green
ON

ON

Red
ﬂashesRed
ON

Energy Saving Eﬀect

Great

Small

Motor Noise

High

Low

Neutral Brake

The Energy Saving Mode should generally be turned on, but turning off
the Energy Saving Mode may help achieve more stableperformance, depending the type of motor and its degree of deterioration.
If the motor has deteriorated, turning off the Energy Saving Mode enables
more stable operation.
Malfunctions caused by noise may be avoided with the Energy Saving
Mode turned off.

15

Various Settings
Output on transmitter handle is shown in the graph below.
(with neutral braking)Transmitter rate
Analog

TRIGGER POSITION

100%

100%

Minimum
brake point
Setup withbrake rate
0%2, 4, 6, or 8 kHz
Set brake frequency

BP
Brake high point

Power limit

1-15 kHzSet drive frequency
Energy savingNP
NeutralDrive output ratio

Brake output ratio

Fix neutral width0%
HP
Normal high point

1. For full-torque driving, set frequency rather low, to around 1.0-2.0 kHz.
2. For smooth driving, set frequency rather high, to around 8.0-14 kHz.
3. As you increase frequency, driving is smoother but the amount of heatgenerated in the electric circuitry increases. When using a high-powered motor,
we recommend that you limit the frequency of the drive brake to 10 kHz.
4. The energy-saving circuit is particularly effective for driving at low and medium
speed. However, effectiveness depends on the type of motor, gear ratios anddrive frequency. If the drive frequency is too low, the energy-saving circuitry
does not work well. On the other hand, if the drive frequency is too high, theloss due to internal heat generation becomes too high. So, generally, thefrequency range for energy-saving is around 3.0-12.0 kHz, according to thesettings for the vehicle.
5. For frequency settings, if the starting speed torque is not high enough, increase
the value of minimum drive power.
6. If the brake doesn't work well, increase the value of minimum brake power.

16

17

Function Indicators (settings are explained from page 20)
Pressing the left or right function switch
changes the display on the indicator.

Main
Save

Power limit(Hereinafter, "switches" shall mean thefunction switch on the main body.)

Load

Voltage

The items displayed by
the 7-segment LED are as follows.

Temperature

Freg

Time

Volt Temp

Main
(LED)

PoLim

1 Main Display

Save (recording)

1
2
3
4
5
6
7

Frequency

Time

Load (reading)This indicates the current output as a percentage.(The display changes
automatically according to the change in the number of LED bars displayed.)
LED main, red lamp is on.
nneutralNormally displays 0P (percent); current value isdisplayed when adjusting the neutral brake setting.

d

drive
Displays values up to 100P (percent) according to
the change in the LED bars

b

brake
Displays values up to 100P (percent) according to
the change in the LED bars.

2 Frequency (F.R.Q.) display

Displays currently set frequency in kHz.
LED (1) is on.
Fddrive frequency
Displays values between 0.1 and 20.0(100 to 20000 Hz).

brbrake frequency
Displays values between 0.1 and 20.0

3 Power limit (P.L.) display
Displays current power limit value.
LED (2) is on.

Displayed values are in units of %.

*The higher the value, the greater the current flowing.

18

4 Battery voltage (VOLT) display

This indicates the current value of battery voltage (units VOLT). (The value ishigher before driving; lower after driving.) This value can be used as a yardstickto assess battery condition. If this value remains low even after recharging,
the battery is effectively dead.
Yardstick voltage values when using
LED (3) is on.
7.2 V NiCd and NiMH
(8 V or higher) High Battery can be effectively used.
(6.8 V or lower) Low Battery is depleted or dead.

5 Measuring time (TIME) display

This indicates the amount of time from the moment when power is turned ONor from the moment the trigger is pulled after reset, until the time the voltage
falls to the set value.To perform a reset, press the left button and right button
together for four seconds (or press the middle button.)
1. If different kinds of batteries are used in the same vehicle, these values canbe used to decide which batteries have the longest running time.
2. If the same kinds of batteries are used in multiple vehicles, these values canbe used to find out the influence of different settings on vehicle run-time.

LED (4) is on.

Reset by pressing
this button for four seconds.

6 Internal temperature (TEMP) Display
LED (5) is on.
This indicates the current internal temperature.

7 Program load

1. The value may be affectedby the road surface
By pressing this button,
temperature.
the display switches
2. We recommend that, as a
between units ofgeneral rule, you dissipate
Centigrade (C) andheat when temperature gets
Fahrenheit (F).
over 100C (210 F).

LED (6) is on.
This is the setting used to call up a program.

8 Program save
LED (7) is on.
This setting is used for saving a program.

19

Setting up Functions

1 Setting the transmitter position
WARNINGNOTE

Before performing settings for each function, make sure to
disconnect the motor or to keep the vehicle suspended in the air.
If the position of the transmitter is not set properly, all subsequent settings
may be inaccurate. So, take care to set up the transmitter properly.

When the display is in the main mode, press the left and right buttons on thesides of the main body at the same time.You can then perform a variety ofsettings by switching the displays using the left button and right button.

Main LED blinks.

1-1 Setting up the transmitter
Firstly, perform settings according to the transmitter.
nutr
dfHP
brHP

neutraldrive (forward) high pointbrake high point

When in SET display mode, press the left and rightbuttons together for four seconds.
The display will then switch to nutr (neutral). Match
the transmitter to the position of neutral, and press
the right button on the side of the main body.
The display will change to drHP (drive, high point).
Match the transmitter to the high point position andpress the right button on the side of the main body.
The display will change to brHP (brake, high point).
Match the transmitter to the high point position andpress the right button.
Settlings are complete and the display returns to SET display mode.

1-2 Setting neutral width
Press the right button in SET display mode.
The initial drive brake position (the position where the brake begins to takeeffect) can be adjusted according to the transmitter you use.
The transmitter trigger performs a count-up on thedrive side and a count-down on the brake side.Set thevalues you want using the transmitter.When you
determine the setting value, press the right button.

201-3 Setting minimum drive power
If starting up speed is slow, you can increase the initial value of the drive,
up to 70% of maximum speed.
The transmitter trigger performs a count-up on thedrive side and a count-down on the brake side.Set thevalues you want using the transmitter.When you
determine the set value, press the right button.

1-4 Setting minimum brake power
If the brake does not work effectively, you can increase the initial value,
up to 70% of maximum braking.
The transmitter trigger performs a count-up on thedrive side and a count-down on the brake side.
Set the values you want using the transmitter.
• If the initial values set for both drive and brake power
are extremely high, motor output width for trigger
operation on the transmitter side will decrease.
• Units used for 4-1-2, 3 and 4 are P (percent).

1-5 Neutral brake power setting
Set this when you want the brake to operate automatically when changing
back to neutral.
The transmitter trigger performs a count-up on thedrive side and a count-down on the brake side.
Set the values you want using the transmitter.

1-6 Engine brake ON/OFF
This setting performs dummy engine braking, which effectively applies brakes
according to the amount of trigger recovery of the transmitter.

The transmitter trigger turns ON on the drive side
and OFF on the brake side.Set to ON/OFF using thetransmitter.
• Brake is applied according to the amount of recoveryof the transmitter trigger.Press the left and right buttons
together (or press the middle button) to register thesetting after deciding the setting value.

21

Setting up Functions
1-7 Energy-Saving Mode (Abbrev. EnSA)
EnSA

100％

70％

30％

0％

Energy Saving

Maximum

Minimum

Motor Noise

LargerSmaller

Schottky Diode−

Required

Required

Required* The energy-saving mode is always at 100% while engine braking is on.

The trigger of PROPO counts up at the drive side and counts down at thebrake side.
The setting can be selected from the four patterns above.
Set to the desired value with PROPO.
Use the EnSA mode at 100% for normal operations.
However, adjusting the EnSA level will ensure more stable operations dependingon the type of motor and its deterioration level.
When the motor has deteriorated, set the EnSA level to "0" to stabilize the operation.
When malfunctions are caused by noise, lowering the EnSA level may alleviate
the problem.
When using the EnSA mode with a setting other than 100%, attach the Schottky
diode to the motor.
(Not required at the 100% setting.)

22

2 Setting frequency
WARNING

Before performing settings for each function, make sure to
disconnect the motor or to keep the vehicle suspended in the air.

When in frequency display mode (p18, 2), press the left and right buttons
together. You can then perform various settings by switching display using
the left and right buttons.

LED (1) blinks.

2-1 Drive frequency
Set to optimum "driving feel" by adjusting frequency.
The transmitter trigger performs a count-up (frequency
increases) on the drive side and a count-down(frequency decreases) on the brake side.Set the values
you want using the transmitter.When you determine theset value, press the right button.
Ex. Displayed values are in units of 1000 Hz.
4.1 = 4100 Hz

2-2 Brake frequency
Adjust the "feel" of applying the brake.
The transmitter trigger performs a count-up on the driveside and a count-down on the brake side.Set the values
you want using the transmitter.When you determine theset value, press the right button.

2-3 Neutral brake frequency
You can set the brake value when using a neutral brake.
The transmitter trigger performs a count-up on the driveside and a count-down on the brake side.Set the values
you want using the transmitter.When you determine theset value, press the left button and right button together(press the middle button).

23

Setting up Functions

3 Setting the power limit and dash power mode
WARNING

Before performing settings for each function, make sure to
disconnect the motor or to keep the vehicle suspended in the air.

When in power limit display mode (p18, 3), press the left and right buttons together.
You will then be able to perform various settings related to power limit and dashpower mode by switching the display using the left and right buttons.

LED (2) blinks.

3-1 Setting power limit
When driving on a slippery road, initial torque can be decreased by lowering
the value to make driving easier.
When in power limit display mode, press the left andright buttons together. LED (2) starts blinking and thedisplay automatically alternates between Po-L (power
limit) and the value (%) in turn. (Power limit setting
display) At this point, you can switch between setting
power limit and setting dash power mode by pressing
either the left or right buttons. When power limit
setting is displayed, the transmitter trigger performs acount-up on the drive side and a count-down on thebrake side. Set the value you want using thetransmitter. When you determine the set value, press
the right button.

3-2 Dash power modeThis function raises the power limit from the first trigger action at starting time,
which helps to start up quickly.
While in dash display mode, press the left and rightbuttons together for four seconds. You will then be indash power mode.Check if the dash and limit value(LXXP = limit XX%) appear in turn, as shown in the
diagram, when power limit display mode returns.
If so, setting is completed.
• If the display shows L100P, no effect will be observed.

24

4 Setting voltage level for time measurement
WARNING

Before performing settings for each function, make sure to
disconnect the motor or to keep the vehicle suspended in the air.

When in voltage level for time measurement, press the left and right buttons
together (press the middle button). To measure time, start from the state where
the trigger is pulled, then stop when the battery voltage reaches the set level.
You can set the battery voltage when time measurement stops.

LED (3) blinks.

To measure time, start from the state where the trigger
is pulled, then stop when the battery voltage reaches
the set level. You can set the battery voltage when timemeasurement stops.When you have determined thesetting value, press the left and right buttons together(press the middle button).Measurement stops as soon
as the voltage drops below the set voltage value, evenfor just a moment. When the battery is running down,
the ordinary voltage value of 7.2 V may drop momentarily
due to motor speed fluctuation. For this reason, set toabout 3-5 V.

5 Program load
WARNING

Before performing settings for each function, make sure to
disconnect the motor or to keep the vehicle suspended in the air.

This function can be used to call up both initial (default) settings and custom settings.
The RAPIDA PRO offers a total of seven types ofprograms.
You can save programs in P1 to P4 or you can callup the original (default) programs stored in advancein P5 to P7.

• Original (default) programs are listed in p15 of this
instruction manual.

25

Setting up Functions
It is possible to load and call up an original(default) program, make a change to it,
save it, and then reuse it as a custom program.

• Set by default at the factory as P5.

When in load display mode, press the left and rightbuttons together.LED (6) starts blinking. Then, set the
number of the program you wish to load by using either
the left button or right button. Then press the left andright buttons together for four seconds. When the
program loading is complete, "End" will be displayed.

6 Program save
WARNING

Before performing settings for each function, make sure to
disconnect the motor or to keep the vehicle suspended in the air.

You can save custom programs according to road and vehicle conditions.
Changed (custom) programs can be saved from
P1 to P4.
When in save display mode, press the left and rightbuttons together.LED (7) starts blinking. After that,
set the number of the program you wish to save by using
either the left button or right button. Then press the left
and right buttons together for four seconds.

When the program loading is complete, "End" will be
displayed.
• Except for program mode, when you turn the
power ON, all previous settings (transmitter position,
frequency, etc.) are restored.

26

Various Settings
Output on transmitter handle is shown in the graph below.
(with neutral braking)nutr
neutral width
nubr
b_Po
d_Po

neutral brakeminimum brake point
minimum drive point

Variable area
0-70%

TRIGGER POSITION
100%

100%
nutr
Neutral widthb_Fr
Brake frequency
0.1-20 kHz

b_Po
Minimum
brake point

0%

Po_L
Power limit

brHP
Brake high point

d_Fr
Brake frequency
0.1-20 kHz
Energy saving,
engine brakenubr
Neutral brakenP
NeutralDrive output ratio

Brake output rationb
Neutral brakefrequency
0.1-20 kHz

d_Po
Minimum
drive point

0%
drHP
Normal high point

1. For full-torque driving, set frequency rather low, to around 0.5-2.0 kHz.
2. For smooth driving, set frequency rather high, to around 8.0-14 kHz.
3. As you increase frequency, driving is smoother but the amount of heatgenerated in the electric circuitry increases. When using a high-powered motor,
we recommend that you limit the frequency of the drive brake to 15 kHz.
4. The energy-saving circuit is particularly effective for driving at low and medium
speed. However, effectiveness depends on the type of motor, gear ratios anddrive frequency. If the drive frequency is too low, the energy-saving circuitry
does not work well. On the other hand, if the drive frequency is too high, theloss due to internal heat generation becomes too high. So, generally, thefrequency range for energy-saving is around 3.0-12.0 kHz, according to thesettings for the vehicle.
5. For frequency settings, if the starting speed torque is not high enough, increase
the value of minimum drive power.
6. If the brake doesn't work well, increase the value of minimum brake power.
7. When you turn the engine brake ON, the speed suddenly changes to match thetransmitter trigger. You can use this as you like.

27

Default values (manufacturer's setting values)
P5'

P6'

P7'

Neutral width

9%

7%

5%

Minimum drive power

10%

7%

3%

Minimum brake power

10%

7%

3%

Neutral brake

0%

0%

0%

Engine brake

––

––

––

Drive frequency

1.5kHz5.0kHz

9.5kHzBrake frequency

2.0kHz4.0kHz5.0kHzNeutral brake frequency

2.0kHz4.0kHz5.0kHzPower limit

100%

100%

100%

Battery voltage fortime measuring

4.0V

4.0V

4.0V

P5': High-torque setting (factory default setting)
By setting the drive frequency to a low value, this setting enhances the trigger
pick-up in the low speed range.
This is a good setting to use when vehicle tires have a good grip.

P6': Standard setting
Frequency of ESC is set to a standard value that provides even performancefrom low to high speeds.

P7': Smooth setting
Frequency is set to handle subtle throttle work from medium to high speeds.

28Installing a heat sink (radiating fin)
WARNINGTo prevent fumes, fire and burns

Electricity flows through the copper plates in the upper part of the
ESC. If you install a radiating fin, electricity may flow through it, so
do not allow other conductors or metal parts to make contact withthe radiating fin.
When running a car outdoors directly under the sun, or if you are using
a high-torque motor, installing a radiating fin enables more stable
operation. Mount the radiating fin as described below:
1. Remove the aluminum sticker at the top of the ESC housing.
2. A metallic plate is exposed.
3. Remove dust from the plate surface.
4. Attach the double-sided tape (included) to a radiating fin (the thin tape)
5. Attach the heat sink securely to the metal plate of the ESC.

(To improve radiation, apply a 2-gel type epoxy resin adhesive instead of the
double-sided tape. Knead the gels well and apply a light coat of it to the heat sink.
Attach the heat sink to the metallic plate and fix them until the adhesive dries.
Note that you cannot remove the heat sink once you attach it.)29

Troubleshooting
Symptom

Cause
Improper setting of ESC

Cannot set "High point"

Brake fails.

Both motor andservo do not work.

Improper transmitter setting
Power limit value too low
Improper setting of ESC
Improper transmitter setting
Bad contact with battery
Improper wiring of receiver
Receiver failure
Transmitter failure
ESC failure
Incorrect setting of ESC

Motor does not work
but servo works.

ESC gets too hot.

Reduced acceleration.

Car operates improperly.

30

Motor failure
Bad contact with battery
Bad contact with receiver connector
ESC failure
Input voltage is too high.
Insufficient cooling
Driving load is too high.
Drive frequency is too high.
Improper ESC setting
Power limit value is too low.
Failure of motor capacitor
Bad receiver position
Transmitter/receiver failure
Incorrect wiring

Remedy
Reset transmitter throttle setting to normal before setting"High point." Set "High point" position to 90% of full throttle.
Correct transmitter throttle setting.
Increase power limit value.
Reset transmitter brake (reverse) setting to normal before setting"Brake high point." Set "Brake point" position to 90% of full throttle.
Correct transmitter brake setting.
Check that contact with battery is good.
Check wiring of receiver and servo.
Replace crystal or request repair.
Replace crystal or request repair.
Request repair.
Setup ESC again from the beginning.
(Make sure to set transmitter position accurately before doing this.)
Replace motor.
Check that battery and cables are properly connected.
Check that receiver connector pins are not broken.
Request repair.
Use 6-cell power supply.
Attach radiating fin to improve air flow and heat radiation.
Adjust drive system to work smoothly.
Lower drive frequency.
Setup ESC again from the beginning.
(Make sure to set transmitter position accurately before doing this.)
Increase power limit value.
Replace motor capacitor.
Keep receiver as far from battery or ESC as possible.
Request repair from the maker.
Check that silicone cables are not running through the receiver side.
31