dji Ace One User manual

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Ace One
User Manual
Revision 2.0
Date: 2011-04-15
http://www.dji-innovations.com
©2010-2011 Dajiang Innovation Technology Co. Ltd. All Rights Reserved.

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Copyrights
This product and manual are copyrighted by Dajiang Innovation Technology Co. Ltd. with all rights reserved. No part of this product or
manual shall be reproduced in any form without the prior written consent or authorization of Dajiang Innovation Technology Co. Ltd. No
patent liability is assumed with respect to the use of the product or information contained herein.
©2010 Dajiang Innovation Technology Co. Ltd. All Rights Reserved.
Disclaimer
Dajiang Innovation Technology Co. Ltd. assumes no liability for damage(s) or injured incurred directly or indirectly from the use of this
product.
Trademarks
DJI and Ace One are registered trademark of Dajiang Innovation Technology Co. Ltd. Names of product, brand, etc., appearing in this
manual are trademarks or registered trademarks of their respective owner companies.

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Product Documents List
The Ace One product package includes the following installation manual.
To correctly use Ace One system and fly safe, please read the instruction carefully before power on.
WarrantyCard
「WarrantyCard」
recommend the necessary conditions for using Ace One system and related safety issues. Please fill out the
customer & helicopter information card and return to DJI to register your product warranty.
QuickStartGuide
「QuickStartGuide」
For experienced users, the quick start guide provides a brief summary of the steps that can also be found in
details in the manual.

AceOneUserManual（inCD）
「AceOneUserManual」 provides you the detailed steps for Ace One basic setup, configuration, parameter settings, operation
processes, and also maintenance of the product.
Reader’s Guide for This Manual
Please strictly follow these steps to mount and connect the Ace One system on your helicopter, as well as to install the Ace Assistant
software on your computer.
Icons seen in this document:
FORBIDDEN Please refer to the page(s)
mentioned TX
R/C Transmitter
configuration
required Alt
A
lt Key
CAUTION Assembly & Mounting Tips Mouse Left Click Enter Key
Correct General Tips Mouse Right Click
Up/Down/
Left/Right
Directions
Keys
Wrong
Ace Assistant
configuration required Ctrl Ctrl Key
Contents
DJI Ace One Introduction..................................4
Package Contents..............................................5
Mounting and Connection.................................6
A1Before you Begin...........................................6
A2Mount the devices on your helicopter............6
A3Connections...................................................7
A4Ace Assistant Software Basic Operation .......9
Flight & Configuration Procedure Brief.........10
Configuration Procedure.................................11
B1GPS & IMU Mounting..................................11
B2Control Mode Switch ...................................12
B3Flybarless....................................................13
B4Swashplate..................................................14
B5Pitch and Throttle Curve Setup....................14
B6Tail Gyro......................................................15
B7Engine Governor .........................................16
B8R/C Transmitter Calibration.........................17
B9SYSTEM CHECK........................................18
B10Autopilot ......................................................19
B11Camera Gimbal Control...............................20
Flight ................................................................. 21
C1Digital Compass Calibration........................21
C2MANUAL MODE Test Flight........................22
C3Enhanced Fail-Safe.....................................23
C4Autopilot Test Fight......................................24
Maintains .......................................................... 25
Flight Log Reading................................................25
Firmware Upgrade ................................................25
Product Info...........................................................25
Appendix........................................................... 26
LED Indicator description......................................26
Product Specifications...........................................27

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DJI Ace One Introduction
DJI Ace One is an autopilot system for radio-controlled helicopters, which completely takes the stress out of flying RC helicopters for
both professional and hobby applications. Ace One can be installed in a variety of models, from small electric helicopters to large
gasoline and turbine helicopters.
Multiple control mode based on autopilot system:
GPSCruiseMode GPSAtti.Mode Atti.Mode ManualMode
Command Stick
Meaning
Flight speed control; Stick center
position for 0m/s, its endpoint for
maximum speed set by user.
Helicopter attitude control; Stick center position
for 0˚ attitude, its endpoint for 45˚which is a
fixed limit.
Mechanical driving
directly
Command Linearity YES NO
Stick Released Lock the position when GPS signal is adequate Only altitude
stabilizing
Recommand for
experience pilot only
Altitude lock Maintain the altitude best above 3 meters NO
Stabilization Flybarless stabilizing on ELEV and AILE direction is available for all control mode
GPS Lost After 10s when GPS signal lost,
System enters
Atti.Mode .Automatically.
Only performing
attitude stabilizing
without position lock.
---
Safety Maintain constant speed Attitude & speed mixture control ensures
stability. Depends on
experience
Enhanced fail-safe featured, auto hover or Go-Home if transmitter signal lost
Appropriate
Applications Long and smooth flight route High agility for all flying ---
Built-in functions include:
Integrated tail gyro
The flying direction (YAW) of helicopter will be effected by
cross wind. Ace One system can detect the drifting angle &
Speed, and control the rudder servo to eliminate such
influences.
In the case of flying forward in cross-wind, Tail Gyro can work
on two different modes as the example shown.
Flybarless rotor head support
Integrated engine governor for internal combustion engines
Tilt and roll gimbal stabilization

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Package Contents
Main Controller
The Main Controller is the brain of Ace One. The Main Controller communicates with the IMU,
GPS/Compass, engine governor, servos and RC transmitter to carry out autopilot
functionality. The Main Controller provides a “black box” flight log, and USB interface to read
flight logs, configure Ace One and update firmware from a PC.
(System requirement: Windows XP SP3 or Windows 7)
GPS & Compass module
The GPS/Compass module includes two status-indicating
LEDs. It should be installed on the tail boom, where there is a
clear view of the sky.
×1
IMU
The Inertial Measurement Unit (IMU) consists of one 3-axis
accelerometer, one 3-axis gyroscope and a barometer.
×1
GPS Tail Boom Mount
The GPS Tail Boom Mount and double-sided foam tape enable
secured installation for the GPS/Compass module on almost
any helicopters.
×1
3-PIN Servo Cable
Cables used to connect the Main Controller to the RC receiver.
×10
3M 5925 Double Sided Tape
（Only for GPS & Compass module）
×4
Micro USB Cable
This cable is used to configure Ace One, update firmware and
download flight logs.
×1
Quick Start Guide
For experienced users, the quick start
manual provides summary of the steps
which can be found in detail in this
manual.
Warranty Information Card
Ace One comes with a two-year
warranty, as described on this card.
Please keep this for your personal
records.
Product CD
The CD contains a digital copy of this manual,
some helpful videos, Ace Assistant and the driver
to connect Ace One to your PC with the provided
USB cable.
×1

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Mounting and Connection
A1 Before you Begin
Fly the helicopter without Ace One and make sure that the helicopter works properly without any autopilot assistance. To complete this
step, you will need a tail gyro instead of Ace One system. This is a good time to isolate and resolve unwanted vibrations.
IT IS IMPORTANT THAT YOU SHOULD NOT SKIP THIS STEP.
A2 Mount the devices on your helicopter
IMU
Where? The IMU is best positioned near the helicopter’s center of gravity, where
vibration is relatively low.
What orientation? Orient the IMU such that the arrow marked on the above
surface of the IMU faces the sky and points directly forward, backward, left or
right. The sides of the IMU should be precisely parallel to the helicopter body.
DO NOT MOUNT THE IMU UPSIDE-DOWN.
How? Use double-sided foam tape for secured installation.
1 Check the double-sided foam tape or Velcro regularly to ensure that the
IMU is securely positioned.
2 DO NOT cover the ventilation holes, keep them unobstructed.
3
The IMU module is NOT water-proof or oil-proof.
GPS & Compass Module
Where? Mount it on the tail boom, between the
rotor-head and the tail-rotor. The compass is
sensitive to magnetic interference, so position the
module at least 20 cm from servos and 30 cm from
electric motors or gasoline (petrol) engines. The
GPS is sensitive to vibration interference, so position
the module at least 10 cm from the tail rotor. The
GPS should not be close to the main rotor head
because rotor blades can interfere with GPS satellite
signal, the farther from the center of the rotor disk,
the better.
What Orientation? The DJI logo marked on the
GPS should face the sky, with the orientation arrow
pointing directly forward. The GPS/Compass is
packaged with a special indication line for mounting
for the first time. The LED status indicators should
face the tail rotor.
1 If you are uncertain whether materials near the GPS/Compass module are magnetic or not, you can use a compass or
magnet to check it.
2 GPS/Compass mounting-support hardware is included in the Ace One package. If however you prefer to use your own
GPS/Compass mount, please make sure that the mount material is NOT magnetic.
Main Controller
Where? There is no orientation requirement for the Main Controller. Maintain at least a 20-centimeter-distance between the
Main Controller and the engine or motor. Choose a mounting location where as shorter servo extension wires are needed as
possible. This helps reduce the risks of electronic interference. Please also make sure the USB port is accessible when installing
the Main Controller so as to facilitate software configuration.
After choosing a location to mount the Main Controller, it is recommended that you DO NOT mount the Main Controller until
all wirings and software configurations are completed.
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1 2
3 4

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A3 Connections
CAN Bus– Interface for Ace One Module
The Ace One Main Controller uses CAN-Bus to power and
communicate with other Ace One modules. Three connection ports
are provided: two on the Main Controller and one in-line connection
on the GPS/Compass wire. Ace One identifies the connected
devices automatically without configuration.
GPS/Compass module can be connected to either port of
Main Controller.
IMU can be connected to the Main Controller or to the in-line
port on the GPS/Compass wire. Connect the GPS/Compass
and IMU to the Main Controller.
Press & Pull out

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Receiver & Servos
STEP1: Set the transmitter to single-servo CCPM (Futaba: H-1; JR/Spektrum: 1sNORM; Hitec: 1-Servo 90°).
Connect the receiver to the Main Controller input servo ports.
For Camera Gimbal control
For Control Mode Switch
For collective pitch or up/down
For gyro sense adjusting
For rudder control
For throttle control
For cyclic pitch or front/back
For cyclic roll or left/right
STEP2: Connect the cyclic servos and throttle servo or ESC (NOT the rudder servo) to the
Ace One output servo ports using the diagram corresponding to the swash type of
your helicopter.
For swashplate servos
ForthrottleservoorESC
For rudder servo
For Gimbal servos
Battery or BEC
Ace One uses the same power source as the servos and receiver; power to all electronics connected to the Main Controller can be
supplied by either servo input or output ports on the Main Controller. Ace One operates with a power source between 4.8 to 8.4 volts
DC. When choosing a power source, bear in mind that all servos and Ace One will use that same power source, thus please make
sure the power source you use will also satisfy the servo requirements. A high capacity battery of 4000mAh or above is strongly
advised, especially for large scale electric powered helicopter.
The power consumption of Ace One is 5W maximum (testing condition: 0.9A@5V). For some small scale helicopters, the
BEC provided may not be able to supply enough overall power consumption, please use high performance BEC.

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A4 Ace Assistant Software Basic Operation
Software and Driver Installation
Please read Software & Driver Installation Guide, the micro-USB port is used for Ace One configuration, read flight logs and update
firmware.
Introduction for Software GUI


How to adjust parameters?
I
Red and bold text indication
if you changed anything*;
II
Write parameters to main
controller.
*except the direct edit items, they
can be written to main controller
directly.
1 TOOL
Firmware upgrade: update your firmware from DJI
server, keep your Ace One system up-to-date.
Read flight log: Upon choosing this, Ace One main
controller will become a mobile drive under [My
computer] directory, and Ace Assistant will be
closed automatically.
2 ABOUT
Information regarding your Ace One
3 Export: export/save Ace One configurations in files.
4 Import: load previously saved Ace One configurations.
5 Wizard: step-by-step, for your first-time-configuration.
6 Write: write data of latest settings of the current page to
your Ace One main controller. The parameter value or the
title of which will appear as red and bold in font when
modifications have been made, make sure you click the
“Write” button to update your Ace One system.
7 Read: read parameters from Ace One main controller.
8 Write all: write latest settings and changes of all files to
your Ace One main controller.
9 Graphic guidance
10 Text guidance
11 Flybarless function ON / OFF indication
12 Engine governor working mode indication
13 Tail gyro working mode & gyro sense indication
14 Autopilot working mode indication
15 Red light: Ace One  PC has been disconnected.
Green light: Ace One  PC has been connected.
Blue light: Ace One  PC communication.
16 Here you can find all the configuration pages the same as
in the “Wizard”.

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Flight & Configuration Procedure Brief
1 For safety reasons, during configuration and system setup, please disconnect the power supply for Electric motor.
2 Please do the following configurations in Manual Mode of the autopilot system.
Steps Description Page
B1 GPS & IMU Mounting Please measure the center-of-gravity (C.G.) of your helicopter, and fill in the
distance between IMU/GPS and C.G. of helicopter in X, Y & Z axles; 11
B2 Control Mode Switch Adjust your transmitter for channel , and then you can switch the
autopilot working mode between Manual / GPS Atti. / Atti. / GPS Cruise; 12
B3 Flybarless Please select flybarless ON/OFF. You might need to adjust parameters
during test flight; 13
B4 Swashplate Setup you swashplates according to your helicopter specification; 13
B5 Pitch & Throttle Curve Setup Set pitch & throttle curve on your transmitter according to our suggestion; 14
B6 Tail Gyro Make rudder correctly responding to your transmitter commands (rotating
C.W. or rotating C.C.W.); 15
B7 Engine Governor Both electric motor and gasoline engine require setting; 16
B8 R/C Transmitter Calibration , , & are required to do; 17
B9 SYSTEM CHECK Check controller output, IMU mounting and battery performance; 18
C1 Digital Compass Calibration Slide the control mode switch on transmitter 10 times, and ACE ONE will
enter the compass calibration mode; 21
C2 Manual Mode Test Flight
Please strictly follow the procedure during flight test, you may need to adjust
the following parameters to achieve the best flight performance: 22
B3 Flybarless control parameters if you’ve enabled Flybarless; 13
B6 Tail Gyro sense; 15
B7 Engine speed and Gov Gain for Gasoline / Nitro engine. 16
C3 Enhanced Fail-Safe
Please strictly follow the failed-safe setting procedure, otherwise this
function might not be working correctly. 23
C4 Autopilot Test Fight
Please strictly follow the procedure during flight test, you may need to adjust
the following parameters to achieve the best flight performance: 24
B10 Autopilot control parameters; 19
B3 Flybarless control parameters if you’ve enabled Flybarless; 13
Except tail gyro sense which is already adjustable via Tx, parameters adjusting via transmitter are also available for
Flybarless and Autopilot. These parameters were indicating with“Remote Adj.”option
on Ace Assistant software, which allows you adjust them from 0.5 to double times:
INH means remote parameter adjusting was disabled;
X1 means Remote Adj. was enabled on channel for this parameter;
X2 means Remote Adj. was enabled on channel for this parameter.
Please finish the following procedure before enable the Remote Adj:
1 Make sure X1 & X2 channel are connected on main controller;
2 Assign two channels on your transmitter for channel X1 and X2;
3 Centered X1 & X2 knobs on transmitter, otherwise the adjustment range for increase / decrease will not be the same.
Notice: The introductions for control parameter adjustment were marked by dash-line box in this manual. You will fly the helicopter
and adjust these parameters for few times during first configuration, to achieve the best flight performance.

11 |
Configuration Procedure
B1 GPS & IMU Mounting
Ace Assistant Software - MOUNTING page
STEP1: Select IMU Mounting orientation
STEP2: Fill in the distance between IMU/GPS and the C.G. of
helicopter in X, Y & Z axles, please measure the C.G.
with following method:
a) Adjust your helicopter, and make it balance on X
and Y axle as shown below.
b) The C.G. should be on the extended line of
helicopter main shaft.
c) Hang the helicopter by the tail
and use a plum line to find C.G.
on Z axle. You can use your own
methods to estimate the C.G. of
your helicopter.
*Step c) is not required in pod/boom without
camera mounted, and scale helicopter. Simply
enter value zero will be sufficient.
GPS normally mounted on tail boom, thus X
and Z could be zero, distance between GPS to
main shaft is X.
1 You must re-configure if the ALL-UP-WEIGHT had been changed on your helicopter, e.g. camera mounted or battery
changed.
2 If mounting locations are not accurate enough or the sign were wrong, error on Y，Z axle will leads helicopter vibrating,
error on X axle will leads drifting during spinning.
STEP1
STEP2

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B2 Control Mode Switch
1 The transmitter you used must be Fail-Safe featured, which allows you to setup fixed outputs for all channels if the
receiver loses signals, otherwise Ace One will not enable the Enhanced Fail-Safe. See Page 23 for details.
2 Working mode for your transmitter should be HELICOPTER.
3 All the channels in your transmitter should be working independently: NO CCPM, NO channel MIX，NO EXP.
4
You need at least one 2 or 3-position switch on your transmitter to be set as the control mode switch.
In Ace Assistant Software, page TX-MONITOR:
Once the switch position has been matched to specific control
mode, you will see the high-light as shown following.
TX Whichever 2 or 3 positions switch/channel user has
selected or decided to use in the transmitter (for control mode
switching), in this case channel U marking on main controller.
Use sub-trim or end-point (+/-) fine tuning on your transmitter,
move the slider of channel U to the specific range until Ace
Assistant indicates that it is in Manual, GPS Cruise, GPS Atti.,
Atti. and Failed-Safe mode.
Notice: To move the slider is to adjust sub-trim or end-points of
the channel selected.
For 3-positions switch, you should assign:
Position-2 to GPS Atti. Mode or Atti. Mode;
Position-1 to Manual Mode;
Position-3 to GPS Cruise Mode or GPS Atti. Mode;
Or reverse the assignment for Position-1 and Position-3.
For 2-positions switch, you should assign:
Position-1 to Manual Mode;
Position-3 to GPS Cruise Mode or GPS Atti. Mode;
Or reverse the assignment for Position-1 and Position-3.
Notice: Please see page 4 for introduction of autopilot control
modes.
Set Fail-Safe output of receiver to input port-U, move
the slider to the range which reads Fail-Safe MODE.
IMPORTANT: Ace One would not execute Fail-Safe protection if
you don’t set it properly. You can verify the Fail-Safe settings by
shutting down your transmitter, and then you can use the
following method to check whether Ace One was already in
Fail-Safe mode.
You can check the current control mode of Ace One
using either of the following methods:
Check the Ace Assistant status bar at the bottom side of the
software interface.
Check the LED indicators status on GPS/Compass module,
see Appendix in this manual for details.

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B3 Flybarless
When system is powered on, you must not move your helicopter or sticks on transmitter until the system initialization is
finished (about 5 second).
Once you changed the Flybarless to “ON”, the AILE and ELEV swash mix ratios in swashplate settings will be disabled, while
[Direction Reverse] button will always be available for AILE and ELEV. After you have set the Flybarless to “ON”, you have
to adjust your swashplate parameters before setting your Flybarless control parameters.
1 You have to adjust flyberless function and test it in Manual Mode first.
2 Don’t try to use Atti. Mode, GPS Atti. Mode and GPS Cruise Mode until you can fly flybar-less without any problems.
3 You might need to reduce the control gain of flybarless if you cannot make the helicopter stably hover or fly under Atti.
Mode, GPS Atti. Mode and GPS Cruise Mode.
In Ace Assistant Software, page-FLYBARLESS:
STEP1: Choose flybarless ON/OFF, you MUST NOT enable
flybarless function for helicopter with flybar, otherwise
the helicopter will be out of control.
When Flybarless is turned on, elevator & aileron will
have stabilization in manual mode.
STEP2: During test flight procedure, please perform the
following configuration procedure.
Gain Parameter range: 20% to 500%
If the helicopter is sluggish, increase it; if the helicopter oscillate backafter brake, decrease it. Adjust this parameter 10% increment
time until your control feeling is sharp and the helicopter would not bounce after braking.
Note: this parameter will only affect the stability but not control feeling.
Direct Input Parameter range: 30% to 300%
This is the direct connect ratio for command stick effect, the rolling speed might not be uniform if it is too high, and also will lead to
quick or sudden change in cyclic response.
Cyclic Rate Parameter range: 20 deg/s to 450 deg/s
This is the helicopter body rolling speed ratio, which determines the maximum rolling speed corresponding to command stick end
point. The helicopter would response very quickly if it is too high, for example high rate in 3D.
Flybar Weight Parameter range: 20% to 300%
The higher the value, the better the static stability of the helicopter. But, it will increases the sluggish on your control feeling, such as
bank turn, and braking is also not sharp enough, like an large inertia helicopter. Similar to adding weight to blade tip.
Suggested Parameters
 ALIGN-600Nitro(Default) ALIGN-600Electric LOGO700 MaxiJoker3DD
 AILE ELEV AILE ELEV AILE ELEV AILE ELEV
Gain 100 100 70 90 150 160 200 250
DirectInput 100 100 120 120 160 180 240 280
CyclicRate 180 180 150 150 150 150 130 130
FlybarWeight 100 100 80 80 130 130 150 150
STEP1
STEP2

14 |
B4 Swashplate
You should finish the setup for your swashplate in Manual Mode.
In Ace Assistant Software, page-SWASHPLATE:
STEP1: You have to set the transmitter to single
servo swash (Futaba: H-1; JR/Spektrum:1sNORM;
Hitec: 1-Servo 90° ), and Ace One will do the CCPM
instead.
STEP2: Please make your selection according to your
swashplate type. IMPORTANT
STEP3: The swashplate can be rotated in 360°, with 1° step
increase or decrease. Not required in most conditions.
STEP4: Click / button, you can reverse the working
Direction of swashplate servos. Servo Trim is in
range -100 to +100, with default value at 0. The
swashplate must be level. The Current Output will let
you indicates whether your swashplate servos are on
their center position or not.
If you have enabled Flybarless function, then Swash
Mix ratio settings for AILE (Cyclic Roll) and ELEV
(Cyclic Pitch) will not be available, please read
Flybarless setting for detail.
Please read your helicopter’s manual, and make sure
the swashplate servo linkage and all the mechanical
parts were correctly adjusted before you use the
above function for swashplate level adjusting.
Swash Mix is identical to Tx CCPM mixing, this function is no
longer avaliable on Tx after set to single servo (on Tx).
STEP5: Click / button, you can reverse the moving
direction for PITCH (Collective Pitch), AILE (Cyclic
Roll) and ELEV (Cyclic Pitch).
The Swash Mix ratio is 0~100%, which defines the
maximum working range for PITCH (Collective Pitch),
AILE (Cyclic Roll) and ELEV (Cyclic Pitch), similar to
Tx setting.
Suggestion: 35~45%, it can give you soft flying
movement, and easy to configure for the following
parameters.
B5 Pitch and Throttle Curve Setup
We suggest you to use the following pitch curve for
better lifting power and safety descending speed.
Throttle curve for electric power,
this is the example for JIVE ESC:
Throttle curve for integrated engine (with
governor function):
STEP2 STEP3
STEP4
STEP5

15 |
B6 Tail Gyro
When system is powered on, you must not move your helicopter or sticks on transmitter until the system initialization is
finished (about 5 second).
In Ace Assistant Software, page-Tail Gyro:
STEP1: Please properly set your rudder servo type before you
connect your tail-gyro servo to it, otherwise your servo
might be damaged due to incorrect servo type chosen.
Analog Servo (1520us @ Receiver Speed)
Digital Servo (1520us @ 200Hz),
Suggested servo type: JR DS8925HV；Align DS620；
Futaba BLS351
Digital Servo (Digital-760us @ 500Hz),
Suggested servo type: Futaba BLS251.
STEP2: We have [LimitA] and [LimitB] (Range: -140 to +140),
which represent end-points of the tail rotor pitch. The
initial value for both is 50. Adjust these two limit value,
make sure your rudder servo can work the full range for
your tail rotor pitch, without any mechanical binding.
Otherwise, the performance of the tail-gyro will be
affected. You can identify which side of the tail rotor
pitch is represented by LimitA / LimitB like this:
1. Set one of them to 0, another to 50.
2. Move your rudder stick on your transmitter.
3. One side of the tail rotor pitch will not move.
4. This side should be related to the LimitA / LimitB
whichever you are giving value 0 to.
STEP3: Move your rudder stick, and check whether the tail rotor
pitch is working to your expected direction. If not, please
change to proper direction.
TX Transmitter related channels
Input Operation Description
Stick Rudder command
Switch 1.Gyro working mode selection:
Rate Mode/Head-Locking Mode
2.Gyro sensitivity setting
3.Quickly slide it from rate mode to
head-locking mode for 3 times,
the command stick center position
would be reset.
You must also finish the SYSTEM CHECK procedure in
later steps, before you fly your helicopter. You might find
the Controller Output Check for tail rudder result in
opposite rudder moving directions, click [Reverse]
button to make corrections. Please see Page 18 .
STEP4: Switch your Tail-Gyro working mode to [Rate Mode], take-off your helicopter and hover. If your helicopter drifts on YAW
direction obviously, then adjust your tail servo linkage until the helicopter stops drifting. Or you can use trim to fine-tune the
rudder servo.
If you used trim during the Tail-Gyro working in Rate Mode, please power off the Ace One and re-start it before you wish to
use Head-Locking Mode.
STEP5: Gyro Sense setting: Set your gyro sense via transmitter, with the channel which you plug into input port-G on Ace One main
controller. We suggest you start from 45% in [Head-locking mode], take off the helicopter, reduce the Gyro sense if tail got
vibrating; if the tail response too slow and drift then increase it. Land you helicopter and switch to [Rate mode], then take off
the helicopter again, fine-tune the rudder servo to make the tail stop drifting and land again. Switch the tail gyro between
[rate mode] and [Head-locking Mode] by 3 times, then center position of Tx will be recorded, now you finished the gyro
sense setting. You can identify the Tail-Gyro working mode on the status bar of Ace Assistant, but that gyro sense
percentage may not be the same as your Tx reading due to different Tx manufacture.
STEP3
STEP1 STEP2

16 |
B7 Engine Governor
In Ace Assistant Software, page-ENGINE:
STEP1: Before using Governor Control mode, fine tune your
Gas/Nitro engine to good condition. Otherwise the
performance would be negatively impacted.
STEP2: Select the operation mode:
Select [TX Control] for electric motor;
Select [Governor Control] for Gas/Nitro engine.
STEP3: SET throttle servo travel range, move the throttle stick to
For Electric For Gas/Nitro Click to set
Maximum open position [SET-MAX]
lowest stick throttle Engine idling position [SET-IDLE]
Throttle hold Cut position [SET-STOP]
Notice: you must not turn on the throttle-cut.
STEP4: After three of the throttle positions being set, click
[TEST] button above to review your throttle working
range settings. Throttle servo will be forced to stay on
each respective position for about 2 seconds. Repeat
the [SET] procedure if any incorrects.
If a mistake is made, e.g, STOP position being set between MAX and IDEL, you will be notified by (Wrong), and Engine
governor will be forced to work in [Tx Control] mode automatically.
STEP5: A third party engine speed sensor is required for the engine speed governor to function. We suggest using Futaba magnetic
engine speed sensor. You have to adjust the sensor/magnet mounting, and leave a proper space between the sensor head
and magnet. You can check this with the percentage bar at page “ENGINE”, over 60% means the magnet is directly facing
the sensor, and less than 2% means that the sensor is far from directly pointing at the magnet.
Notice: Only ONE magnet can be mounted on cooling fans of the engine.
STEP6: Please refer to user manual of your helicopter and engine, find the following parameters:
Main rotor speed, in range: 800 to 2500 RPM;
main gear ratio, in range: 1.0 to 20.0;
Engine RPM, in range: 6000 to 25000 RPM. ( Will be calculated automatically )
STEP7: Gov Gain setting, range: 50% to 300%;
Suggestion: 50% for Nitro engine; 150% for gasoline engine;
Governor STARTS to work in all of the following conditions:
throttle stick position is higher than 20% from cut-throttle;
When engine speed has been raised above 70% of set RPM;
When engine speed sensor works correctly.
Governor STOPS working in either one of the following conditions:
Throttle stick position lower than 10% from cut-throttle;
Engine speed < 3000 RPM or sensor not working.
GPS Cruise, GPS Atti. and Atti. Modes take over the throttle, pitch & cyclic positions at the point of switching from Manual
mode. It is essentially how Ace One knows to maintain throttle relative to rotor RPM, not withstanding Go-Home function
hence throttle hold other than Manual Mode will not cut the engine or motor. Unless, it is switched back to Manual Mode.
STEP2
STEP7
STEP6
STEP3
STEP4
STEP5

17 |
B8 R/C Transmitter Calibration
In Ace Assistant Software, page-TX MONITOR:
Totally 4 TX channels are required to be calibrate:
STEP1. Click [START] button, and move all of the sticks
throughout their complete range several times.
STEP2. Click [FINISH] button when you finished above
procedures.
1 You have to finish the throttle and pitch curve setting
before calibration, here the end-point of transmitter
sticks will be record.
2 If the throttle or pitch end-point of transmitter had
been changed, please calibrate it again.
STEP1

18 |
B9 SYSTEM CHECK
You have to run the system check in Ace Assistant – SYSTEM CHECK for Ace One system to work properly:
Controller Output Check
1 Switch to Non-Manual mode first.
2 Click [START] button,Ace One will drive the swashplate going up and down, representing collective movement during flight.
3 Click [NEXT] button, Ace One will drive the swashplate going forward and back, representing elevator movement during flight.
4 Click [NEXT] button, Ace One will drive the swashplate going left and right, representing aileron movement during flight.
Up
1
Down
2
Up
3
Front
1
Back
2
Front
3
Right
Left 1
2
Left 3
5 Click [NEXT] button, Ace One will drive the rudder, representing rotating C.C.W. and then C.W.
1
C.C.W.
1
C.C.W.
31
C.W.
32
6 Click [END] button or switch to Manual mode, Controller Output Check will be finished.
IMU Feedback Check
1 Switch to Non-Manual mode first.
2 Click [CHECK] button.
3 Tilt the tail boom of the helicopter, the swashplate should respond to the opposite direction.
4 Tilt the helicopter body on its roll direction, the swashplate should also respond to the opposite direction.
5 Switch to Manual mode and finish the IMU Feedback Check.
1 If your helicopter was not responding as described above, you may be placing your IMU in a wrong orientation, or
you’ve select a wrong orientation for your IMU in Ace Assistant. Please check sensor mounting again.
2 If the swash is not level (This is not critical), this can be cause by:
IMU is not level to AIR frame;
AIR frame and landing skids are not level to ground.
Battery Performance Test
1 Switch to Non-Manual mode first.
2 Make sure that your battery has at least 80% capacity left from being fully charged.
1 Click [START] button,Ace one will force all the servos you connected and LEDs working at maximum payload, which will behave
as shaking swashplate and rudder. This will continue for 20 seconds and then stop automatically, you can force it stop by clicking
[STOP] button, or switch to Manual mode.
2 Ace Assistant will inform you the test result (LEDs on GPS will also blinking in yellow if failed condition was matched):
Failed, it means voltage drop below 3.5v, the battery or BEC were not be able to provide necessary power, please change it.
Test passed.
If the swashplate or rudder moves in opposite sequence, you should click reverse button / for correction.
If the swashplate or rudder still doesn’t moves as your expected, it may cause by wrong connection between Ace One
main controller and R/C Receiver, please also check the swashplate setting and Tail-Gyro setting.
Veryimportant,checkthemcarefully!

19 |
B10 Autopilot
In Ace Assistant Software, page-Autopilot:
Base Parameters
Gain
Range: Front/back & Left/Right 40% ～ 400%; Vertical 50%~250%
If too large, you will find the helicopter oscillating in the
corresponding direction (About 5~10Hz). If too small, the
helicopter will likely to be hard to control.
In GPS Atti. Mode and GPS Cruise Mode, if helicopter drifting
on front/back or left/right direction for 2~5 meters, then increase
10% on the corresponding direction it drifts to until the helicopter
getting oscillation. If helicopter vibrate on its vertical direction,
then reduce vertical parameter by 10% until it get stable. If
altitude drop and drift happens during sharp braking, then
increase I.D.R-Vertical in advance parameters.
MAX Speed Limit ( m/s )
Range: Front/back & Left/Right 1.0
～ 10.0 m/s
Agility Range: 50%
～ 200%
It determines the start-up speed from command stick, the bigger
the value the faster the reaction. Increase it for sharper and
quicker leveling action after command stick released. The control
feeling will be stiffness and rigid if the value is too high; and
sluggish leveling action and slow braking if too small.
Stick Delay Range: 50%
～ 200%
It determines the overall stick reaction speed, for example:
You push your roll stick to the maximum position your helicopter
will tilt from leveling to 45 degrees, the smaller the number the
quicker the transition.
Advance Parameters
The default values are suitable for most of the condition,
please check DJI website for details.
Velocity Tracking Range: Front/back & Left/Right 20.0%～
250.0%; Vertical 20.0%～150.0%
I Range: Front/Back & Left/Right & Vertical 0%～500%
Transmitter related channels
Input Operation Description
Switch Control Mode Switch
Switch Quickly slide it from rate mode to
head-locking mode for 3 times,
all the command sticks center
position would be reset, see
page 15 for tail gyro working
mode setting.
Stick Up/Down command from Tx
Stick Front/Back command from Tx
Stick Left/Right command from Tx
Stick Rudder command from Tx
Suggested Parameters
 ALIGN600Nitro ALIGN600Elec. LOGO700 MaxiJoker3DD JRGSR260
 F/B L/R V F/B L/R V F/B L/R V F/B L/R V F/B L/R V
Gain 100 100 100 130 110 80 150 151 100 160 160 110 155 165 130
Agility 100 150 130 100 175
StickDelay 100 110 135 185 166
VelocityTracking 100 100 100 110 110 113 100 100 100 100 100 100 100 100 100
I 100 100 100 114 115 116 100 100 100 100 100 100 100 100 100

20 |
B11 Camera Gimbal Control
This function aims to auto balance the 2-D camera gimbal. Roll direction of the gimbal is fully automatic controlled by Ace One, Pitch
direction is automatic controlled by Ace One with real-time manual adjustment support.
In Ace Assistant Software, page - Gimbal:
STEP1: Servo travel limit and center position
Range: -1000 to +1000
MAX /MIN are servo travel limits; adjust them to avoid
mechanical binding; Place your helicopter on level
ground, adjust CENTER value of PITCH and ROLL
direction to make the camera mounting frame to your
desired angle-to-ground.
STEP2: Direction & Automatic control gain Range: 0 to 100
Adjust the reaction speed of automatic control, the initial
value 100 is full speed；Click / button, and then
you can reverse the feedback control directions.
STEP3: Manual control command for Pitch direction of the gimbal.
You should assign one of the knobs on your transmitter to
X1 channel for controlling the Pitch direction (angle) of
camera gimbal during flight.
If parameter adjustment was enabled on channel X1, the
gimbal manual control via channel X1 will not be force to
disabled.
STEP4: ManualControlSpeed Range: 0 to 100
Adjust the reaction speed of pitch direction manual
control, the initial value 100 is full speed.
STEP1
STEP2
STEP4