Software/Hardware Setting Questions

Please download the driver from our website and install according to the user manual. Be noted that the main controller should be powered up by battery and USB plugged into computer before installing the driver.
Ace One supports Windows 32 bits and 64bit Microsoft Windows XP, 7 and Vista.
Ace One can stabilize the gimbal on 2 axia –Pitch and Roll.
Yes, Ace One support FBL, you can turn on/off FBL support from the Ace One assistant software.
Only DJI engineers can read the flight log. You can send the log to DJI for analyses if necessary.
Please assign a switch for the control modes according to the user manual. Servos won’t respond to your command if you are in Fail safe mode.
Could be IMU lost. Pls check your connection.
Ace One controller does not require high power consumption. When flying Flybarless, power requirement from digital servos can be higher than Flybarred setup. We recommend using external BEC with minimum 7.5A power. Use of external power pack such as 2S Lipo is recommended for gasser and longer flight time.

Know more about this problem please click here go to our wiki.

Follow the illustration in software and find the XYZ of your heli, the measure the distance from center of IMU/GPS to C.G. The area with red arrow should be positive, while green line is negtive.
Please double check the tail feedback in headlock mode.
  1. Some of the users who use WINDOWS 7 operating system may not have the usbser.sys file, please download this file and put it into C: \ WINDOWS \ system32 \ drivers, and then reinstall the driver.
  2. Download the usbser.sys file.

Flight Questions

Yes, Ace One can be flown without GPS in Atti mode. However, position hold will be affected while altitude hold is maintained using on-board barometer sensor.
Ace One configuration software supports servo frequency speed from 125 to 560Hz. Please make sure to obtain servo frequency response from the manufacturer.
No, a minimum 7-Channel radio and receiver are required to operate Ace One.
Yes, during test flight you can use radio sub-trim or trim to adjust for leveling flight. We do recommend you to use software trim afterward and re-set all radio trims to zero value.
No, once calibrated, re-calibration is only needed when the flying field is far from the location of last calibration (over 20 miles),or electronic devices are added or removed.
No, we do not recommend flying the helicopter in rain, as water might get into GPS compass and controller causing electrical shortage.
Once setup, you don’t need your computer or laptop. In normal setup, it might require a handful of parameter changes.
Your local DJI dealers should be able to guide you through. Or, write to DJI headquarter, we can offer assistance via phone contact.
Make sure in auto mode “System Check” the swash movements (up/down) correspond to the correct direction in providing positive and negative pitch.
Make sure you have servo frequency response from the manufacturer. Using lower frequency will reduce tail wag and servo temperature.
Connect switch channel to U channel of MC, use Trim menu to adjust 2nd switch to Atti. Mode, use End Point to adjust 1st and 3rd switch for Manual mode and GPS mode.
Make sure all channels of your transmitter support Fail-Safe, adjust any one of the 3 switch control modes to Fail Safe mode, then record the position value in Fail Safe of your Tx. After that, switch to other control mode and turn off the transmitter, assistant software show it jumps into Fail Safe mode and meantime LED shows blue ligh, setup is done.