|Jan 21, 2015, 05:25 AM|
Joined Sep 2013
Inspire 1 FAQ (Unofficial)
Hey all, I've been watching a lot of the Inspire 1 threads and trying to compile a list of the most asked questions. Since the owner's thread has ballooned to about 3 trillion posts , I thought I'd start a new FAQ thread with what I think are hopefully some of the more helpful bits of information. Feel free to post your suggestions of things to add, delete, or update.
Inspire 1 FAQ
Current Hot Topics
Is the Inspire 1 entirely safe to fly right now (1/21/2015)?
You may have seen recent reports about issues with the Inspire 1, along with videos of various people crashing them in a variety of ways. Although it's impossible to know the exact reason for crashes posted on YouTube, DJI is currently investigating at least 3 separate crashes where users report erratic behavior (immediately flying up and away, immediately flying forward, etc). DJI acknowledged a potential IMU issue in firmware .14 and it is HIGHLY recommended not to fly your new Inspire 1 until you update to at least version .16. To download the firmware and installation instructions, follow this link: http://www.dji.com/product/inspire-1/download
An additional issue that has been reported is the (highly unlikely) possibility of a self-tightening prop becoming lose and coming off during flight. DJI has also acknowledged this issue as well, and will be shipping all users "prop-locks"¯, which are small plastic clips that will keep the props from coming lose. Here is a video recently posted by DJI showing the prop-locks and how they will install:
Again, it is HIGHLY recommended that you not fly your Inspire 1 until you receive and install the prop-locks. If you choose to fly regardless of the recommendation not to, be sure to hand tighten the props by holding the bell of the motor and tightening each prop. Also, for anyone thinking of custom ways to secure the props in the meantime, I received the following information from DJI employee "Tahoe Ed":
Is there an iOS version of the DJI Pilot App for the Inspire 1?
Currently there is not an officially available version of the DJI Pilot app for iOS. There was an iOS version of the app available briefly from DJI's site, but it has been pulled since DJI was using a workaround "developer enterprise" implementation to distribute the app. Apparently Apple caught on to this and forced DJI to stop distributing the app in that manner. However, DJI support assures customers that an official version of the app (via the app store) will be available soon. In the meantime, it is still possible to very unofficially get a copy of the iOS app that was briefly released. It has been re-uploaded and made available courtesy of forum member "wattsn". Installation is done at your own risk, but the installation instructions are as follows:
"I shall ensure any updated versions are uploaded here so the latest should always be available assuming no bandwidth/download restrictions applied to my account. To install this on your iPad or iPhone, no jailbreak necessary, simply follow the instructions below."
Which Android devices are compatible with the Inspire 1 and DJI Pilot App?
According to the DJI specs list, the following devices are compatible with the Inspire 1:
I ordered the dual-controller version of the Inspire 1, but I only received a single controller, what's going on?
DJI is currently shipping the single-controller version of the Inspire 1 to customers that ordered single and dual-controller versions. For those that ordered the dual-controller version, DJI will be shipping you the additional controller at some point in the near future.
I'd like to buy a DJI Inspire 1, but nobody seems to have them in stock. Where can I buy one?
The following two vendors have been active in the RCGroups Inspire 1 owner's thread, and have both been quick to mention when they have stock of the Inspire 1 and corresponding accessories. I have no connection to either one, but both seem to have quick response and good customer interaction:
(As of 1/21/2015)
David at www.AllERC.com (Often has the Inspire 1 and TB47 standard¯ batteries available)
Kerry at www.MulticopterWarehouse.com (Recently has the Inspire 1 available)
I'm an advanced user and would like to be able to check the balance of my props. Is there a prop balance rod available yet that is compatible with the Inspire 1's props?
David at www.AllERC.com has some prop balance rods available here: http://www.allerc.com/orion-rc-balan...rs-p-9782.html . These aren't necessary an "official" accessory, but will allow users who own a prop-balancer such as the Du-Bro ( http://shop.dubro.com/p/tru-spin-pro...ncer-qty-pkg-1 ) to effectively balance the props.
Are the TB48 extended capacity batteries shipping yet?
I haven't seen any retailers in the USA with them in stock yet, but hopefully soon. Other countries may get them sooner.
Why do the carbon fiber tubes on my Inspire 1 look strange/different than the ones I've seen?
"The classical CF tube is made of prepreg. The inner part is made of undirectional prepreg and the surface is a layer of 3K woven prepreg. The other CF tube with larger patterns is made from a completely different process, which is filament winding. You could consider a winding tube is made of semi-woven CF completely, from the bottom to the surface. Compare to prepreg tubes, winding tubes shows much better torsion strength but is more difficult to manufacture, it heavily relies on expensive automation equipments. On the other hand the tooling to make prepreg tubes is very simple and cheap. Both prepreg tube and filament winding tube meets the standard of inspire 1 so they will not bring in any noticable performance difference. As a matter of fact two tubes cost almost the same. DJI chooses to use them both simply to secure the supply chain"¯ - Dr. Tubro of DJI
Why do some of the motors on my Inspire 1 have 4 threaded holes instead of 2 on the bell?
This is probably due to manufacturing demand. The two motors should be identical except for the thread pattern. Most likely, it is not a problem and should not affect the flight characteristics or compatibility with accessories.
Basic Operation Tips
What are some good "safe flying" rules of thumb? (Some advice is U.S.A. specific)
How do I make the Inspire 1 return to the home point?
On the DJI Inspire controller, press and hold the RTH button for 2 seconds. This ensures you don't accidentally hit the button.
How do I cancel the Inspire 1 from returning to the home point?
Just like initiating the RTH, you can cancel the RTH by pressing and holding the RTH button for 2 seconds.
Do I need to calibrate the IMU?
Yes, you should calibrate your IMU before the first time you fly. There's a possibility the IMU calibration changed during shipping, so be sure to use the DJI Pilot app to calibrate the IMU before you fly. Make sure you do this on a perfectly flat surface and away from any sources of interference. This can be done by clicking the "Mode" button near the top left, then scroll to the bottom and click "Advanced Settings". Next click "Sensors" and scroll to the bottom to click "ADVANCED" calibration.
Do I need to calibrate the compass?
Yes! Absolutely. It is recommended to calibrate the compass every time you fly in a new location. Make sure your Inspire 1 is on a flat, even surface away from any type of metal or large metallic structures. In the DJI Pilot app, click the "Mode" button near the top left, then scroll to "Calibrate Compass". Once you've clicked calibrate you will rotate your Inspire 360 degrees horizontally, followed by tilting the nose straight down towards the ground and rotating it again (vertically). You can find a video demonstrating this here:
What should the orientation of the Inspire 1 controller's antennas be in order to achieve the best signal and maximum range?
Generally, the signal from the type of antenna used on the Inspire 1 controller is transmitted perpendicularly outward from the face of the antenna. This means, if you have the antennas pointed out straight ahead, the signal is going mostly up/down. If you have the antennas pointing straight up into the air, the signal is going mostly forward/backward. If you will be flying almost directly above where you are standing, it may be heplful to keep the antennas pointing forward. However, for most flying in which you are flying out in front of yourself, it is best to keep the antennas pointing straight upward for maximum range distance. Try to always face the direction of the craft for maximum signal strength and range.
What's a good start up procedure? *courtesy Yostopia*
1) Confirm SD in camera.
2) Confirm ND filter in camera.
3) Prop install and check tightness
4) Final A/C check
5) Flight mode switch to GPS
6) Tx power ON.
7) Open app, check that app/Tx are communicating
8) Check cached map and set any distance limits
9) Put Tablet and Phone into Airplane mode
10) A/C power ON, remove any metal (keys, etc) from pockets
11) Calibrate compass and let A/C soak up GPS for 2-3 min
12) Status check for slow-green indicator light flash
13) Confirm camera/video functions (log mode, resolution and frame rate, ISO, shutter speed, etc)
14) Record switch ON
15) Take off
16) Gear up
17) Gimbal horizon adjust
18) Remember to drop gear before landing.
Why does my Inspire 1 seem to vibrate when flying in the wind with the landing gear up?
**courtesy of BryanB**
"This is a known issue, sorry that you're experiencing this. If you would like to send in the unit for a repair, I could help you with that. However, the problem seems to come from the large 16-sided tie-down nuts on the front of the T-section of the arms. You can take a wrench to those and tighten them down a little bit, this seems to fix the vibration on many units." - DJI Pro Support
DJI says the batteries will get 18 minutes flight time, but I'm only getting 12-15, what gives?
The flight times given by DJI are rated by simply hovering around 10 feet off the ground until the battery goes almost bone dry. If you did that, you'd get more like 18 minutes on a standard 4500mah 6s battery. But, if you're flying around quickly, in heavy wind, in low temps, or other variables you will get quite a bit lower than the rated 18 minute flight time on a standard battery. It's not technically a problem, just a frustration of typical advertising.
The pinch clip on the harness/lanyard to hold my controller doesn't feel safe/broke. What can I do about it?
**courtesy of Moera Creative¯**
There is a potential issue with the harness pinch clip breaking lose which could cause you to drop your controller. This could result in some very costly damage. DJI has supposedly acknowledged the issue and you can contact support to submit a ticket for the recall. DJI will send you a new harness in 2-3 weeks when the new batch is imported from China. In the meantime, you could also Google some of the various replacement clips and workarounds that others are using for their harness.
The motors on my Inspire 1 spin twice rapidly when I arm the motors right before I take off. Is this a problem?
This is normal behavior and not a problem. The motors perform this action in order to help ensure the self tightening props are attached snugly. DO NOT RELY on this alone. It's simply an extra measure of caution. But you should be manually hand tightening your props before flying.
I'm trying to update the firmware on my Inspire 1 but it just seems to keep restarting. Whats wrong?
You may need to connect the Inspire 1 to a device running the DJI Pilot App in order to complete the firmware upgrade successfully.
I updated the firmware on my Inspire 1 and I think it was successful, but in the corresponding txt document on the microSD card it says "result:cancel", did it work?
It is likely that you have updated to the correct firmware. Many users have reported the "result:cancel" status but have confirmed that the firmware did indeed update. If you have "result:failed" then it didn't work.
When my Inspire 1 is on the ground and I move the rudder stick left or right, the gimbal seems to move with it. Is this normal?
Likely, yes. Multiple users report this same behavior and it's thought to be normal.
What are the best settings to use for the highest quality and ability to edit in post?
I'm trying to tilt and pan the camera nice and slow, but the movement is always jerky. How can I get the pan/tilt to be smoother?
The pan and tilt sensitivity can be adjusted in the DJI pilot app. Go into the RC settings by clicking on the little transmitter signal strength icon, then clicking "RC Control Settings"¯. For the tilt, click on "Gimbal Wheel Speed" then take it down to around 30% for a much smoother tilt function. For smoother pan, click on "Stick EXP Curve"¯ and adjust the "Yaw EXP curve"¯ to 0.30 for a much smoother Yaw response.
My video files all seem to stop at 4gb, is this normal?
Yes. Even though the Inspire 1 may support exFAT formatting, it still limits the maximum file size to 4gb to ensure compatibility with a FAT32 environment in which files may not exceed 4gb in size. However, the camera can continuously record and will simply start recording an additional file as soon as each 4gb file is filled up. You'll just have to be sure to line up all of the corresponding files in your editing program to make sure you get all of the parts of the footage.
I'm trying to shoot video at 24p/30p/60p but I only see the options for 25p/50p, how do access those framerates?
You need to go into the DJI Pilot App, in the "General Settings" area (the little gear icon in the top left) and choose the appropriate region for your camera. NTSC for 60hz (24p,30p,60p) and PAL for 50hz (25p,50p)
Do I need to use an ND filter? What does it do?
The Inspire 1 ships with two camera filters. Typically, the camera comes with the clear filter already installed. However, along with the gimbal/camera you should find an additional filter in a small brown/black pouch. This additional filter is called an "ND filter" and helps to block a specific amount of light from reaching the camera. This will allow the camera to shoot with a lower shutter speed when shooting in bright situations (outdoors with lots of sunlight). A lower shutter speed will help to reduce the "rolling shutter" jitter that is sometimes seen in brightly lit scenes. Basically, if it's really bright out, use the ND filter. If it's not bright out, use the clear filter. You can exchange filters by simply screwing them onto or off of the front the camera.
Which resolution and framerate should I be filming at?
That depends on what you want to do. 4k provides the most resolution, but is limited to 30fps. It provides the maximum image quality. However, it may also be difficult for you to edit if you have an older/slower computer. 1080p is a lower resolution but will allow you to shoot in 60fps. This may be helpful if you're shooting sports/action or want to produce slow-motion effects in post production.
Should I be shooting image in .JPG or .DNG?
.JPG is a compressed image format. It doesn't take up much space, and can be viewed on most computers. However, the image quality is not nearly as good as .DNG. DNG is a "raw" image format which captures the data straight from the image sensor with no compression. It makes full use of the camera's resolution and allows you to make changes to white balance and other settings easily in post with no loss in quality. Make sure you have a program on your computer capable of viewing and editing DNG files. I strongly recommend shooting in .JPG+.DNG mode because you then have quickly viewable .JPG files, but also will have access to the maximum image quality of the .DNG files for post-processing.
Advanced Settings and Current Firmware Info
**courtesy of rbendjebar**
Does the Inspire 1 have the ability to fly via GPS waypoints?
Not currently no. DJI have not announced GPS waypoint functionality, but that doesn't mean it will never be available. We don't know for now.
In the pictures I've seen, many people seem to have a carry case for the Inspire 1. Does that come with it?
Yes. To my knowledge everyone who ordered the Inspire 1 receives a really nice carrying case with it. The case holds the Inspire 1, a total of 7 batteries, 2 controllers, a charger, and space for a couple of tablets.
Will there be an SDK available for the Inspire 1 so that developers can make custom apps for it?
Yes, although the timeframe for the SDK release has not been made public.
How is the number of battery discharge cycles calculated?
1 discharge cycle is added each time the battery is discharged by 75%
Example Video / Photo
**courtesy of "laselvasurf" **
**courtesy of "anticipate" **
**courtesy of "Evilmonkee42" **
*will update soon*
|Jan 21, 2015, 06:54 AM|
United Kingdom, Scotland, Dundee
Joined Jan 2015
Great start. Am I right in thinking you are using a Samsung Tab Pro 8.4 yourself?
If so, what do you think of the tablet brightness for use on very sunny days?
|Jan 21, 2015, 07:12 AM|
Joined Sep 2013
It's nice and smooth but the brightness for outdoor use leaves a bit to be desired. Of course, almost all tablets do when viewing in direct sunlight, and I really don't know of any tablets that are much better. I may eventually add some sort of hood, but for now I love the elegance and simplicity of my setup. Just the Inspire, the controller, and the tablet. No jerry-rigging, no velcro, no zip-ties, no tape. Everything is just simple and sleek. I compared my Tab Pro 8.4 to an iPad Air 2 and the difference in brightness was marginal. Definitely not nearly worth the price difference for me personally. YMMV
|Jan 21, 2015, 07:40 AM|
Joined May 2014
Thanks so much for this post. It will help a ton of people that don't want to sift through over 10k posts in the other thread! That thread is crazy, look away and you have 8 pages to catch up on.
|Jan 21, 2015, 09:12 AM|
United States, MA, Boston
Joined Dec 2013
Great job on this!!! Thanks for taking the time.
A few notes: The case has space for 3 batteries and really only enough space for one tablet (a small 7" Nexus) where the manual is in the box.
The included ND may not be string enough to counter bright sunlight (and thus open your shutter up, eliminating jello) depending on the wind, etc.
I shoot in AWB, LOG, but don't reduce contrast. LOG is already a defined gamma curve that meshes well with Gopro Hero 3/3+ Protune. I have applied Protune LUTs essentially (via film convert) and the translation is spot on. If you reduce contrast further, you are only compressing the LOG curve more without getting anything out of it but noise. Reducing contrast going for a flat profile when you are shooting LOG is making things worse. It's ok to do when you have no LOG gamma however, if only because it is an approximation of LOG. But don't mix the two.
|Jan 21, 2015, 10:23 AM|
Au contraire on the battery storage. There is space for 6 additional batteries in the case. Look under the controller storage (space for two batteries there).
And thanks a bunch, Ian, for putting up this thread. I was gonna do it (really!) but you beat me to it.
|Jan 21, 2015, 10:35 AM|
Las Vegas/Lake Tahoe
Joined Feb 2010
Ian, nicely done. I will note that DJI R&D tested the use of rubber washers under the props and does not recommend that they be used. They can actually increase the risk of props flying off.
|Jan 21, 2015, 10:52 AM|
Joined Apr 2013
|Jan 21, 2015, 11:07 AM|
Small update, version 1.0.3 of the android app no longer has an option for basic IMU calibration. The only option now is the advanced calibration.
|Jan 21, 2015, 11:31 AM|
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