Hobbywing XTREME STOCK ESC User Manual
USER MANUAL OF XTREME STOCK ESC HW-SM502ENG-20120817 Page 1 of 4
Model
XTREME STOCK ESC
Cont./ Burst Current
60A/380A
Suitable Motor
Sensored & Sensorless Brushless Motors
Suitable Car
1/10, 1/12 on-road & off-road cars for all STOCK racings
Suitable
Motor
4-6 cells NiMH or 2S Lipo
≥8.5T(1/10 on-road), ≥11.5T(1/10 off-road)
8-9 cells NiMH or 3S Lipo
≥13.5T(1/10 on-road), ≥17.5T(1/10 off-road)
NOTE: The pre-installed firmware has Boost Timing and Turbo Timing function, which makes the motor run at an extreme high speed.
You should NEVER speed up the throttle while the motor is empty loaded.
Please disable the Boost Timing and Turbo Timing when the ESC is used in an off-road car to avoid the damage to the chassis or the
gearing system.
Resistance
0.0006 ohm
Battery
4-9 cells NiMH or 2-3S Lipo
BEC Output
6V@2A Built-in BEC (Linear mode DC-DC regulator)
Dimension
33mm*28mm* 31.5mm (Cooling fan included)
Weight
46g (Neither cooling fan nor wires included)
Fan Working Voltage
5V@0.16A (The fan gets the power supply from the built-in BEC)
A) Switch off the ESC, turn on the
transmitter, set the direction of throttle
channel to ”REV”, set the throttle trim to
“0”, set the “EPA/ATV” value of throttle
channel to “100%”, and disable the
ABS function of your transmitter.
B) Use a pen or screw driver to hold the
“SET” key and then switch on the ESC,
and release the “SET” key as soon as
possible when the red LED begins to
flash.
(Refer to the picture on the right side)
C) Set the 3 points
according to the
pictures on the right
side.
► The neutral point
► The end point of
forward direction
► The end point of
backward direction
D) When the process of
calibration is finished,
the motor can be
started after 3
seconds.
【DECLARATION】
Thanks for purchasing our Electronic Speed Controller (ESC). High power system for RC model can be very
dangerous, so please read this manual carefully. In that we have no control over the correct use, installation,
application, or maintenance of our products, no liability shall be assumed nor accepted for any damages, losses
or costs resulting from the use of the product. Any claims arising from the operating, failure of malfunctioning
etc. will be denied. We assume no liability for personal injury, consequential damages resulting from our
product or our workmanship. As far as is legally permitted, the obligation to compensation is limited to the
invoice amount of the affected product.
【FEATURES】
Smart and small with metal shell.
Drives sensored and sensorless brushless motors.
Factory pre-installed supercharged STOCK competition firmware with Boost Timing and Turbo Timing function.
Firmware updatable. Zero timing firmware is optional to be compliant with ROAR SPORTMAN rules.
Compatible with all firmwares of XERUN-120A-SD and XERUN-60A-SD ESC.
User programmable. Plenty of programmable items make the ESC be suitable for each racing.
Easily programmed with the “SET” button on the ESC, and also compatible with the advanced professional LCD
Program Box.
Multiple protection features: Low voltage cut-off protection / Over-heat protection / Throttle signal loss protection /
Motor blocked protection.
Splash proof and dust proof.
【SPECIFICATIONS】
any order). If the motor runs in the opposite direction, please swap any two wire connections.
Note: For SENSORLESS motor, you can also set the throttle channel of your transmitter to the “Reverse”
direction, and then the motor will run oppositely. And please calibrate the throttle range again after changing the
direction of throttle channel. Please keep in mind that this method is ONLY available for SENSORLESS motor.
2. Throttle Range Setting
(Throttle Range Calibration )
In order to make the ESC fit the throttle range, you must calibrate it when you begin to use a new ESC, or a new
transmitter, or change the settings such as the neutral position of the throttle stick, ATV or EPA parameters, etc.
Otherwise the ESC cannot work properly.
There are 3 points need to be set, they are the “Top point of forward”, the “Top point of backward” and the “Neutral point”.
The following pictures show how to set the throttle range with a FutabaTM transmitter.
【BEGIN TO USE THE NEW ESC】
1. Connect the ESC, motor, receiver, battery and servo correctly.
a) Sensored brushless motor wiring
When using brushless motor with Hall
Sensor， it is necessary to connect the
sensor cable to the “SENSOR” port on the
ESC, and ESC can automatically identify the
motor type (sensored or sensorless) by
detecting the signal coming from the
SENSOR port.
WARNING! For sensored brushless
motor, the #A, #B, #C wires of the ESC
MUST be connected with the motor wire
#A, #B, #C respectively. Do not change
the wires sequence optionally!
b) Sensorless brushless motor wiring
When using brushless motor without Hall Sensor,
the #A, #B, #C wires of the ESC can be
connected with the motor wires freely (without
3. The LED Status In Normal Running
► Normally, if the throttle stick locates in the neutral range, neither the red LED nor the green LED lights.
► The red LED lights when the car is running forward or backward and it will flash quickly when the car is braking.
► The green LED lights when the throttle stick is moved to the top point of the forward zone.
【ALERT TONES】
1. Input voltage abnormal alert tone: The ESC begins to check the input voltage when power on, if the voltage is out of
the normal range, such an alert tone will be heard: “beep-beep-, beep-beep-, beep-beep-” (There is 1 second interval
between every “beep-beep-” tone).
2. Throttle signal abnormal alert tone: When the ESC can’t detect the normal throttle signal, such an alert tone will be
heard: “beep-, beep-, beep-” (There is 2 seconds interval between every “beep-” tone).
USER MANUAL OF XTREME STOCK ESC HW-SM502ENG-20120817 Page 2 of 4
Version Programmable Items Amount
V2.0_100528_MOD 15
V2.0_100518STOCK 15
V2.0_100422STOCK 15
V1.10_090205_MOD 10
V1.10_090323a_m 10
V1_508_NO timing 10
Trouble Possible Reason Solution
The connections of battery pack are
not correct
Check the power connections, replace the
connectors or switch
The switch is damaged
After power on, the red LED lights, but motor
cannot run
Throttle signal is abnormal
Check the transmitter and the receiver, and check
the signal wire connection of your ESC
1) The wire connections between
the ESC and the motor need to be
changed
2) The chassis is not suitable for this
ESC
1) The battery has a bad discharge
performance
1) Use a better battery
2) The gear rate is too aggresive so
the motor load is too heavy
2) Use lower KV motor or change the gear rate or
set the "Start Mode" more softly
1) Check the connection of Hall sensor cable to
make it firmly connecting the motor with the ESC
2) The Hall sensors in the motor are damaged,
please change the motor
The motor trembles but cannot start smoothly
1) The connctions are not A-A, B-B
and C-C
2) The ESC is damaged
1) Check the connections
2)Contact the dealer for after-sales service
Check the voltage of the battery pack
The motor runs in the opposite direction
1) Swap any two wire connections between the
ESC and the motor. (Note: This method is ONLY
available for SENSORLESS motor )
2) Please don't use the ESC for this special
chassis
When accelerating quickly, the motor stops or
trembles
The motor stops running while in working
state
The ESC has entered the “ Low
voltage protection mode ” or the “
Over-heat protection mode”
The red LED flashes means Low voltage
protection, please replace the battery pack
The green LED flashes means Over-heat
protection, please wait for some minutes to cool
the ESC
After power on, motor doesn’t work, no sound
is emitted
After power on, motor can't work, but emits “
beep-beep-, beep-beep-” alert tone. (Every “
beep-beep-” has a time interval of 1 second )
Input voltage is abnormal, too high
or too low
When the throttle stick is in the neutral range,
the red LED and the green LED flashes
synchronously
The motor is a sensored motor, but
the ESC detects abnormal signal
from the sensor, so it changes to
sensorless mode automatically
1 2 3 4 5 6 7 8 9
1. Running Mode
Forward
with Brake
Forward/Reverse
with Brake
Foward/Reverse
(For Rock Crawler)
2.Drag Brake Force 0% 5%
10%
20% 40% 60% 80% 100%
3.Low Voltage
Cut-Off Threshold
Non-
Protection
2.6V/Cell 2.8V/Cell
3.0V
/Cell
3.2V
/Cell
3.4V
/Cell
4.Start Mode(Punch) Level1 Level2 Level3 Level4 Level5 Level6
Level7
Level8 Level9
5.Max Brake Force 25% 50%
75%
100%
6.Max Reverse Force
25%
50% 75% 100%
7.Initial Brake Force
= Drag Brake
Force
0%
20% 40%
8.Neutral Range
6% (Narrow)
9% (Normal) 12% (Wide)
0° 3° 6° 9° 12° 15°
18°
21°
0.00 ° 3.75 ° 7.50 ° 11.25 °
15.00 °
18.75 ° 22.50° 26.25°
10.Over-heat Protection
Enable
Disable
11.Reserved item note2
12.Turbo Timing OFF 1° 2° 3° 4°
5°
6° 7° 8°
13.Boost Start RPM 3000 4500 6000 7500
9000
10500 12000 13500 15000
14.Turbo Delay 0s 0.1s 0.2s 0.3s
0.4s
0.5s 0.6s 0.7s 0.8s
15.Timing Punch
(RPM/Degree)
200 300
400
550 700 850 1000
9.Boost Timing note1
Timing
Programmable
Items
Programmable Value
Basic Items
Advanced Items
【TROUBLE SHOOTING】
The optional firmware versions are as follows:
The ESC firmware with 15 programmable items uses Boost Timing and
Turbo technology, which is a great innovation for STOCK racing. For a
standard 11.5T STOCK motor, powered by 2S Lipo battery, when the ESC
applies the maximum timing to the motor, it runs at an incredible speed
more than 110000 RPM, which is much close to the speed of a MODIFIED
motor (While using traditional technology, such a 11.5T STOCK motor
only runs at about 26000RPM).
But the new technology also has some negative impacts; it brings more
power loss and lower efficiency of the whole system. So it is very
important to set the programmable items of your ESC correctly.
Note2：The 11th item is reserved item, with no function.
Note3：Please check the manufacturer’s website to get information about the latest software for XERUN-XTREME STOCK ESC.
2. Explanation For Each Programmable Item
2.1. Running Mode: With “Forward with Brake” mode, the car can go forward and brake, but cannot go backward, this
mode is suitable for competition; “Forward/Reverse with Brake” mode provides backward function, which is suitable for
daily training.
Note: “Forward/Reverse with Brake” mode uses “Double-click” method to make the car go backward. When you
move the throttle stick from forward zone to backward zone for the first time (The 1st “click”), the ESC begins to brake the
motor, the motor speeds down but it is still running, not completely stopped, so the backward action is NOT happened
immediately. When the throttle stick is moved to the backward zone again (The 2nd “click”), if the motor speed is slowed
down to zero (i.e. stopped), the backward action will happen. The “Double-Click” method can prevent mistakenly
reversing action when the brake function is frequently used in steering.
By the way, in the process of braking or reversing, if the throttle stick is moved to forward zone, the motor will run forward
at once.
“Forward/Reverse” mode uses “Single-click” method to make the car go backward. When you move the throttle
stick from forward zone to backward zone, the car will go backward immediately. This mode is usually used for the Rock
Crawler.
【PROGRAM THE ESC】
1. Programmable Items List (The italics texts in the form are the default settings)
2.2. Drag Brake Force: Set the amount of drag brake applied at neutral throttle to simulate the slight braking effect of a
neutral brushed motor while coasting.
2.3. Low Voltage Cut-Off: The function mainly prevents the lithium battery pack from over discharging. The ESC
detects the battery’s voltage at any time, if the voltage is lower than the threshold for 2 seconds, the output power will be
reduced 70%, after 10 seconds the output power will be completely shut off and the red LED flashes in such a way:
“☆-☆-, ☆-☆-, ☆-☆-”. Please stop your car at the track side as soon as possible to avoid obstructing other racing cars.
Please note that the cutoff threshold is basically calculated for each LITHIUM (Lipo) battery cell, so for NiMH battery
packs, if the voltage of the whole NiMH battery pack is higher than 9.0V, it will be considered as a 3 cells lithium battery
pack; If it is lower than 9.0V, it will be considered as a 2 cells lithium battery pack. For example, a NiMH battery pack is
8.0V, and the threshold is set to 2.6V/Cell, so it will be considered as a 2 cells lithium battery pack, and the low-voltage
cut-off threshold for this NiMH battery pack is 2.6*2=5.2V.
There are 6 preset options for this programmable item. You can customize the cutoff threshold by using an advanced
LCD Program Box (Optional equipment) to trim it with a step of 0.1V, so it will be more suitable for all kinds of batteries
(NiMH, NiCd, Li-ion, Lipo, LFP, etc).
2.4. Start Mode (Also called “Punch”): Select from “Level1” to “Level9” as your like, Level1 has a very soft start
effect, while level9 has a very aggressive start effect. From Level1 to Level9, the start force is increasing. Please note
that if you choose “Level7” to “Level9” mode, you must use good quality battery pack with powerful discharge ability,
otherwise these modes cannot get the burst start effect as you want. If the motor cannot run smoothly (the motor is
trembling), it may caused by the weak discharge ability of the battery pack, please choose a better battery or increase
the gear rate.
2.5. Maximum Brake Force: The ESC provides proportional brake function. The brake force is related to the position
of the throttle stick. Maximum brake force refers to the force when the throttle stick is located at the top point of the
backward zone. A very large brake force can shorten the brake time, but it may damage the gears.
Note1：When using the firmware with 15 programmable items, the 9th item will be “Boost Timing”. Otherwise the 9th items will be
“Timing”, and 11th to 15th items will be canceled. The factory default firmware is V2.0_100518STOCK (with 15 programmable items).
2.6. Maximum Reverse Force: Sets how much power will be applied in the reverse direction. Different value makes
different reverse speed.
2.7. Initial Brake Force: It is also called “minimum brake force”, and it refers to the force when the throttle stick is
located at the initial position of the backward zone. The default value is equal to the drag brake force, so the brake effect
can be very smoothly.
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