Introduction
Thank you for purchasing the EXSTRAIGHT. To get
the best from your EXSTRAIGHT, please read thismanual carefully. After reading it, be sure to keep it
in a convenient location.

Ultra-small digital speed controller Instruction ManualFeatures• The state-of-the-art, ultra-compact power MOSFET <SOP*1> is employed, achieving a power-on resistance value (FET standard)of 0.25mΩ.
• The MPRS system*2 is adapted to a large current circuit. The ultra-small controller minimizes heat generation and significantly
reduces loss of battery energy.
• The current limiter setting enables smooth start-up and improves run-time.
• The brake rate adjustment enables faster braking.
*1 SOP : Today's mainstream system developed by KEYENCE for the first time as a surface-mount package and speed controller.
*2 MPRS (Metal Plate Radiation of heat Structure) : Hybrid structure which conducts current not through a copper foil but through a metal plate on the PC board.
It allows the best configuration with the FET.

CAUTION
The following symbols alert you toimportant messages. Be sure to readthese messages carefully.

WARNING

Instructions to prevent serious injury

CAUTION

Instructions to prevent accidents or product damage

NOTE

Additional information on proper operation

Precautions
1. Ni-Cd or Ni-MH battery
WARNING: To prevent fumes, fire, and burns
Improper use of the battery is very dangerous. The battery must be handled carefully. Incorrect wiring or short-circuiting of thecables may cause fire or fumes. Before connecting or disconnecting the battery to or from the ESC, be sure to turn off theESC's power switch. Do not charge the battery while it is connected to the ESC. When the battery is not in use, disconnect itfrom the ESC or charger, and store it in a location with no wires or screws.

2. Connection of silicone cables
WARNING: To prevent fumes, fire, and burns
A faulty wiring or electrical contact (short-circuit) will damage the amplifier and may generate fire or smoke. In addition, both the amplifierand battery may become irreparable. Refer to the electrical wiring diagram (note the colors and positions) and arrange the wiring properly.
Also, make sure to remove the battery before starting the wiring operation in order to prevent ignition or other accidents.

3. Mounting motor
WARNING: To prevent fumes, fire, and burns
Make sure to attach the provided shottkey diode and condenser to the motor. When the motor revolves, excessive voltage (surgeover-voltage) is generated, which may damage the amplifier under some circumstances. Mounting the shottkey diode andcondenser will control the voltage (surge voltage) applied to the amplifier. In addition, it will enhance the efficiency of the motor
revolution. Refer to the section of "Wiring and names of each part" on the following page and perform the mounting procedure
properly. Note that the shottkey diode has polar characteristics. Be sure to mount the shottkey diode in proper orientation.

4. Heat sink (Radiating fin)
WARNING: To prevent fumes, fire, and burns
Electricity flows through the metallic part at the top of the ESC. Therefore, do not allow wiring cables, other metallic parts and the carbon
chassis to make contact with the ESC. When a heat sink is attached, electricity flows through the heat sink. Exercise the same precautions.

5. Proper operation
CAUTION: To prevent accidents and product damage
Do not modify the ESC. 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.

6. ESC mounting orientation
NOTE : To prevent accidents and product damage
Except for at the outer side of the car, mount the ESC with its terminal side oriented to prevent the cable connector (terminal)side and PC board from any damage caused by car bodies contacting, collision, or turnover.

Current limiter★Limiting the maximum current to the motor prevents a skid and improves battery efficiency.

NOTE The trimmer turns within a range of 240 degrees. Do not force it past this range.
Current(A)Current limiter trimmer (0 to 100%)
The " " mark in the trimmer indicatesthe set value.

Currentlimiter value
100%(No limitation)

As illustrated on the right, changing the current limiter value changes themaximum current capacity. When the road surface is slippery, lower thelimiter value (close to 0%). When you need high torque, raise the value. If
you set the current limiter value to 100%, the current limiter function
does not work and maximum torque can be produced. If you set the value
to 0%, the current is limited to the minimum value and some motors may 0
revolve at a slow speed. Set the value according to your needs.

Brake adjustment function

A=100
A=50
A=050%

0%Time★Adjusting the brake to match the road surtace enables smooth running

NOTE The trimmer turns within a range of 240 degrees. Do not force it past this range.
Current limiter trimmer (0 to 100%)
Normal mode
Brake adjustment trimmer (0 to 70% max)
The " " mark in the trimmer indicatesthe set value.

In normal mode, the minimum brake level can be changed by setting thebrake adjustment trimmer. When the trimmer is set to minimum, thebrake level changes linearly with the trigger level. When the trimmer is set
to maximum, the minimum brake level is 70% of the maximum brakelevel. If you need strong brakes, gradually increase the setting value until
you find a suitable level. Turning on the power switch while holding down
the SET switch and then releasing the SET switch activates the neutral
brake mode. The neutral brake level is the value specified with the brakeadjustment trimmer. (The neutral brake mode is reset when you turn theA-01B off and on again without holding the SET switch. The operation
mode setting is not retained.)

Brakelevel
100%
Approx.
70%

35%
Brake adjustment trimmer:
Brake trigger
At minimum0%
Neutralneutral and brake-high point.

level
（※）
Brake

Brake-high point

Neutral brake mode
Brakelevel100%※ Brake trigger level : The level of the throttle opening between theBrake adjustment trimmer:
At maximum

Approx.
70%

Brake adjustment trimmer:
At maximum

35%
Brake adjustment trimmer:
At minimum0%
NeutralBrakeBrake trigger
level（※）

Brake-high point

Dash power mode ★When a car is started, the current limiter can be canceled only with the first throttle operation if you want to make a quick start.
1. Turn the transmitter on and hold down the SET switch for approximately 5 seconds. The LED flashes. (Same as in setup mode.)
2. Wait until the LED stops flashing. (Approximately 10 seconds) The dash power mode is set.

NOTE If any noise interferes with the above setting procedure, the ESC may mistake the noise for throttle
operation and may not set the dash power mode.

Mounting heat sink (Radiating fin)
WARNING: To prevent fumes, fire, and burns
Electricity flows through the radiating plates. If you mount a radiating fin, theelectricity might flow through it. Do not allow other cables and metallic parts tomake contact with the radiating fin.

★If you run a car under normal conditions, the radiating fin is notnecessary. When running a car under a blazing sun or if you are using
a high-torque motor, mounting the radiating fin enables a morestable run. Mount the radiating fin as described below:
1. Remove an aluminum top 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.
(Be sure to always use thin double-sided tape.)
5. Securely attach the heat sink to the metallic plate of the ESC.
(To improve radiation, apply 2-gel type epoxy resin adhesive instead of thedouble-sided tape. Knead the gels well and apply a light coat of it to the heatsink. 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.)Tips
(1) About the setting of the braking point:
When the braking point is set to a value that is too low, the brake feels
weak.
• For a Propo radio control with ABS, turn off the ABS first, set the braking
point, and then turn on the ABS again.
• When you have problems with the setting, reverse the current setting of
the reverse switch on the throttle side of the transmitter, and then adjust
the amplifier settings again.

(2) About the setting for the braking rate:
Adjusting the braking rate will enable smoother travel motion. Use thisfeature when faster braking performance is required with a heavy car body,etc. First, turn the braking adjustment trimmer to the leftmost position,and then gradually turn it to the right to increase the initial strength of thebrake actuation. Adjust the braking rate to the optimal point while
checking the travel motion. (Note that the maximum braking power will
not change.) When the neutral braking setting is selected, the setting isadjusted so that the braking is always set to ON when the car is put inneutral. This feature displays its force when traveling on a course requiringhigh cornering abilities. Use this feature as required.

(3) About the setting of the high point:
The setting of the throttle high point can be adjusted normally at fullthrottle. However, the setting can also be adjusted short of full throttle (60to 80%) to change the sensation of operation (acceleration feel). Adjust
the setting at the point with optimal operational feeling.

Part names and wiring
WARNING: Precautions to prevent smoke, fire, or an explosion
Be extremely careful to observe the correct polarity for the wiring of the battery and Schottky diode. Be sure to install a capacitor
and Schottky diode to the motor. If you do not, the ESC may malfunction.

■ With no connector■ With a connector

FET servo power line (yellow)
Aluminum shield

Battery

Rx connector

Battery★Schottky diode(Pay attention to the polarity)

Connected to battery

OFFON− BAT

Power switch− MOT

LED lamp
Set switch

Brake adjustment trimmer
Noise reduction capacitor

Motor

Motor

Current restraint trimmer
Capacitor

Connected to the motor＋ BAT＋ MOTLoad on the amplifier is reduced.
Pay attention to the polarity
when reattaching.

indicates points to be soldered.

NOTE Solder the terminals with care so as not to damage the internal circuitry. Insulate points
where the conductor is exposed, where wires have been stripped or soldered, using tape orheat shrink tubing. Otherwise, a short may occur.

NOTE If you use a motor with less than 13 turns, you
should attach a schottky diode to the left side ofmotor. (It reduces heat generated from theamplifier, and improves efficiency.)

Receiver connector
WARNING: Precautions to prevent smoke, fire, or an explosion
Be sure to remove the batteries before modifying the wiring. Be extremely careful that the wires' polarity is correct.
Note that we do not repair servos and receivers.
This type is attached stopper to preventfrom falling out at the connector side(resin part), not connecter pin side (metalpart). Pull out the cable while a convex
part of the connector is raised slightly
using needle, cutter or sharp thing
when you pull out the cable. Insert thecable untill there is a sound of crack
while turning the side withconnector pin (metal part)up when you insert thecable.

Manufacturerof your receiver
Shape ofconnector insert
port(receiver side)

WiringFormer SANWA, Former KO FUTABA, New KO New SANWA (Z connector), JR
Avoid reverse
insertion.

Cut
here

The connector can beused without change.

Avoid reverse
insertion.

Cut
here

NOTE Be careful of treatment at the time of using a cutter.
This side should be turned up.

Usage
Setup ★Perform each setup procedure within 10 seconds after the LED begins flashing. (This is because the unit is automatically reset after 10 seconds.)
1. Ensure that the ESC's power switch is turned off.
2. To lock a car, eliminate any driving force on the tires by disconnecting the motor cable, etc.
3. Turn the transmitter on. Reset each throttle function (throttle curb, ABS, trimmer point, etc.) to the normal position.
4. Turn the ESC on.
5. Hold down the SET switch for approximately 5 seconds.
6. The LED indicator flashes. (The ESC enters setup mode.)
7. Set the transmitter throttle to "Neutral", and then press the SET switch once.
8. The LED indicator flashes faster.
9. Set the transmitter throttle to "High point" (at 90% of full throttle), and then press the SET switch once.
10. Setup is completed.

Setup confirmation
With a correct setting, the LED will light at neutral, turns off as the throttle is gradually opened, and light again at high point andbrake point. If the setting of the transmitter interferes the correct setting, repeat the procedure after setting the reverse switch of
the transmitter's throttle to the opposite side. See also the separate sheet"Key to setting".

When using a high-torque servoWARNING: To prevent fumes, fire, and burns
Be sure to remove the battery and external power supply before changing the wiring. Ensure that the polarity of the wiring iscorrect. Incorrect polarity may cause a malfunction in the ESC, receiver, and servo.
When using a high-torque servo, the capacity of the BEC power supply may become insufficient. Install the provided resistor for thehigh-torque servo as shown in the wiring diagram below.
RX cable on the servo side: red (orange) line

Power-supply line for FET servo (yellow)

SolderingServoNOTE

Protective resistor for servo (2W/0.47Ω)(1) Since the resistor element has no polar characteristics (positive/negative), there
is no need to consider the wiring orientation.
(2) Make sure to isolate the soldered points using a shrinkable tube after applying
solder.
(3) Although the resistor generates some heat after a long travel motion, this is not
an abnormal phenomenon.
(4) Make sure to install the resistor, because it is designed to protect the servo.

ReceiverTroubleshooting
Symptom
Cannot set "High point"
Brake fails.
Motor and servo bothdo not work.

Motor does not work,
but servo works.

ESC gets too hot.

Cause

RemedyImproper setting of ESC
Improper transmitter setting
Improper setting of ESC
Improper transmitter setting
Bad contact with battery
Improper wiring of receiver
Receiver failure
Transmitter failure
ESC failure
Improper setting of ESC
Motor failure
Bad contact with battery
Bad contact with receiver connector
ESC failure
Input voltage is too highInsufficient cooling
Driving load is too highSchottky diode failure

Reset transmitter throttle setting to normal before setting "High point". Set "High point" position at 90% of full throttle.
Correct transmitter throttle setting.
Reset transmitter brake setting to normal before setting "Brake point". Set "Brake point" position at 90% of full throttle.
Correct transmitter brake setting.
Check that contact with battery is good.
Check that wiring of receiver and servo is correct.
Replace crystal or request repair.
Replace crystal or request repair.
Request repair.
Setup ESC again from the beginning.
Replace motor.
Check that battery and cables are properly connected.
Confirm whether the Rx connector pin is broken or loose.
Request repair.
Use 6-cell power supply.
Attach radiating fin to improve air flow and heat radiation.
Adjust driving system.
Confirm whether the schottky diode connected between the body and the motor is loose or damaged.
If the diode appears to be damaged, exchange it.
Setup ESC again from the beginning.
Increase current limiter value.
Confirm whether the schottky diode connected between the body and the motor is loose or damaged.
If the diode appears to be damaged, exchange it.
Replace motor capacitor.
Keep receiver as far from battery or ESC as possible.
Request repair.
Make silicone cables as short as possible.

Acceleration is decreased.

Improper ESC setting
Current limiter value is too low
Schottky diode failure

Car behaves incorrectly.

Failure in motor capacitor
Bad position of receiver
Transmitter/receiver failure
Incorrect wiring

Specifications
Power supply
Maximum current
ON resistanceDimensions

6-cell or 8-cell, Ni-Cd or Ni-MH battery
Max. current of battery
0.00025 ohm (FET Data)
30.6 (W) x 26.1 (D) x 13.1 (H) (except for terminal)

Weight (ESC unit)
Regulator for receiver/servo
PWM frequency

17 g
5.8 V output, 1 A max. (when 7.2 V is input)
2930 Hz

Perforated line

Request card for repair

Repair regulations
1. The part that can be repaired is as follows. Internal electronic circuit(Damage caused by incorrect connection or running operation is not covered by the warranty.)
2. Note that repairing the ESC is impossible in the following cases.
When opening the ESC housing.
When using a power supply other than the specified 6-cell or 8-cell battery.
When modifying the wiring in order to use a separate power supply.
3. KEYENCE assumes no responsibility for damage of the receiver or servo caused by incorrect connectionof the ESC.
4. Note that if the repair card is not filled out, repair and return of the ESC may be delayed.

Item

EXSTRAIGHT

Manufactureno.
Costomer's
address
Telephone no.

Please fill in the blanks below.

Date ofpurchase.

.

.

3 months fromthe date of purchaseWarranty
termーTEL

Please describe condition of the ESC as detailed as possible.

2. Your equipment

Warranty
Ultra-small digital speed controller

1. Symptom (Condition)（）

NameNote that if the date and location of the EXSTRAIGHT purchase are not entered on the warranty card,
you will be charged for repairs even within the warranty term.

If a failure should occur within three months of the date of purchasing the ESC,
write the symptoms of the problem and the working condition on a separate sheet.
Request a repair of the ESC from either the distributor where you purchased theESC or from ACUVANCE (Technical Service Department).

Technical Service Dept.
7F, Shin-Osaka Marubiru Annex 1-18-22 Higashinakajima Higashiyodogawa-ku
Osaka 533-0033 Japan. E-mail support@acuvance.co.jp

Description
Motor
Battery

Maker

Model No.

OthersTurn No.

ReceiverTransmitter
Servo
R/C CarVoltage:V

Capacity:

mAh

F-1

Buggy (4WD)

Touring Car

Buggy (2WD)

3. Shop where you bought the ESC
Name:

Address :Tel. No. :0413-2