Does anyone have a recommendation for a 3-axis gimbal for an Iris+?
The only option I have found out there is the DYS 3 Axis. Are there any others that work with a GoPro Hero 4 Black?
If someone who owns a DYS and an Iris sees this, I have a few questions:
Thanks a million. I had a decent flight today with settings I experimented with from "bench-top" testing. I think one problem I am noticing is that some movement (like end-point jerky-ness) in my video is due to the super flexible grey dampers. I think they are too weak. On my DJI H3-3D gimbal I use the white dampers that are quite a bit more rigid. I'm going to look for a firmer set of dampers (my DJI ones don't fit the DYS holes, and I'm not risking drilling holes for something that might not work).
I did re-do my 6-axis acceleration calibration, along with a Gyro calibration. My YAW offset during forward flight appears to be quite a bit less than it was before. I will try your settings and see how my gimbal responds. I had gone back to Firmware 2.3b5, but maybe I will try 2.4b7 like yours (since the firmware has to match the settings, I'm told).
Erik, Thank you so much for this great info on the your research. I find myself in the same situation (wanting to get better video) and was leaning toward the FyTech Fy-G3 gimbal (based on the afore mentioned youtube videos).
Total newbie question - I have only been flying in "Loiter" mode while capturing with my Tarot 2D & GP3 and have noticed the yaw you mention. Are you in "standard" more when you fly? I'm under the impression the video would be better in STD mode. Does one always fly without GPS to get the best video? Sorry haven't had much flight time due to work.
The other question is do you feel the price XProHeli charges for the gimbal vs a eBay seller is worth the difference? You mentioned you don't use the mod switch and I don't know how much the software cost but it sounds like you have gotten some tech support from them. Plus it looks like they add the brass standoffs
Again Thanks so much It's been really helpful
oops. Sorry Joe, I didn't see this post until today. Let me see if I can answer your questions:
Are you in "standard" more when you fly? I'm under the impression the video would be better in STD mode. Does one always fly without GPS to get the best video?
I fly in Loiter very often. I also fly in Alt-Hold (which is labeled STD by default on the Iris+ controller). Alt-hold is smoother than Loiter. But Loiter can be very smooth if the Iris is properly tuned. If there is a lot of wind, you basically have to fly in Loiter (or an Auto Mission). The only exception is when the wind happens to be moving in the direction you want the copter to go. Then you can just put the Iris at the start position, switch to Alt-hold, and let the wind drift it to the end position. For me, nature rarely cooperates, so I have to use Loiter or an Auto mission to get those shots.
The other question is do you feel the price XProHeli charges for the gimbal vs a eBay seller is worth the difference?
Its hard for me to answer that. I really didn't want to mess with configuration or tuning, so I went with xproheli. I've been happy with the results. I was able to install it and fly. I don't know how much trouble I would have had with a stock DYS. From what I've read though, it sounds like people have a lot of problems getting them configured and tuned. And yes, they add the brass standoffs for you.
As Erik said, and I can attest to. The extra $100 is well worth it, however it is a moot point now as Xproheli is now out of the DYS. I copied all of Erik's setting and my DYS still wouldn't cooperate and kept spinning around the yaw axis.... Someone on another forum told me to reverse the polarity of the Yaw motor and it worked. I still have some jello so will try swapping out the dampening balls next.
No worries Erik. I went ahead and purchased the gimbal from xproheli. while the gimbal does work better than the Tarot 2d it still exhibits some jitter at all times. I've flown it out of loiter in standard mode and even let it go were the wind takes it and it still has jitter - see link below. I've balanced the props
I emailed xproheli several times about this and while they replied they were't really much help basically saying it was the wind causing the jitter and that was that. Now I've had it up with very little wind and it still has the jitter. I've had dozens of "test" flights and they all have the same jitter.I've experimented with different PID settings I've seen on the net and none of them work as well as the xproheli setting - which are the same as Erik's. I intend to experiment more but just haven't had the time and have settled for the jittery video. I really wanted to do some high quality video but the jitter makes it mediocre at best
With the Solo coming out I may cut my loses and sell my iris
has anyone use the DYS to pan or just tilt ?
You know, the movement isn't that noticeable until you play that video full screen.
Before getting into the gimbal / jitters, let me just say that if you want to shoot professional looking video you really do need to use a decent editor. I use Adobe or Final Cut X. Actually I pretty much just use Final Cut now. It's easier to use. Final Cut's little brother, iMovie, is good too (especially if you avoid overusing effects and transitions). Anyway, almost all decent quality editors include some kind of stabilization feature. Any of these could totally dial in your footage. If I took your clip into Final Cut, I would probably end up using "inertia cam" stabilization. (I'd also letterbox and color grade it).
The other thing, is that I see some yaw movements that feel like they are coming from your hands on the controller. Those need to be more gentle and soft. Same goes for tilt up and down. I have the same issue with tilt and I'm thinking about going into settings and seeing if I can soften up the tilt response. Anyway, sometimes you can salvage a clumsy tilt or yaw by slightly slowing down the clip during those motions. If you shot at 30fps, you'll need a professional editor with something like Final Cuts "optical flow" to interpolate frames during the slowed down portion of the clip.
Now, as to your jitters.... The high frequency vibration is not too bad, but there is something off for sure. When you play the video full screen, it feels like its rocking back and forth. I almost get the feeling that the rubber dampers are too soft. Its as if they are sloshing around. I've never flown in warm weather. Maybe the black Tarot dampers that they recommend are not good for a climate like yours. Have you tried the grey DYS dampeners that came in the box?
I do get that kind of rocking when I first take off, but then it settles in a few seconds. I think its just the gimbal/camera shaking/sloshing around from the initial force of the launch.
It guess it is kinda windy in that video, but not very - certainly the palm trees are blowing a bit. Still, it doesn't seem like enough to cause the rocking/sloshing motion in your video.
You've done the props, but other things you can try:
IMU calibration - every 8 hours of flight time or 2 days.
Just tilt on the Iris+
Unless you have retractable landing gear, you would not want to pan anyway. Better off doing that by yawing the whole Iris. Basically there is just enough side to side real-estate to allow the gimbal to soften yaw twitches and jiggles. Actually, if you yaw to fast, you can easily expose the landing gear... but fast movements like that don't make for good video anyway, so seeing the landing gear is the least of your problems in those instances.
Just a few tip for anyone using DYS 3 axis gimbals.
The standard gray dampers are not great. You can make them much better by stuffing them with earplugs until they are firmer. Or get the Tarot dampers used in the 2 axis Tarot- they are better. This is the main cause of jitter in wind and fast movements.
These all leave the factory with inconsistent motor polarity. Just use the GUI auto polarity to establish motor polarity. This is usually why they spin wildly
Do the six point calibration!
When they work well they work well. Manufacturing quality is spotty and some DYS go pro gimbals seems to be off balance as holes are not centered well. I suspect this is the main cause of frustration....I think there is some info on the large RC Groups thread on this. Some mounting holes in particular can be off and this can be fixed.
I have tried to stabilize the footage with premiere 6 but find it goes to crap when stabilized because of all the fine detail of the foliage. Plus if can introduce some funky side effects.
The Warp Stabilizer in Adobe Premiere is very good, so I'm surprised you are having issues. Overall, I find Adobe's User Interface to be to clunky and complicated, so I have pretty much switched over to Final Cut X. In Final Cut, I find the "inertia cam" setting is best for most aerial video, except selfies/dronies. I think you should be able to get good results with the Warp Stabilizer, but you might have to experiment and research.
For part of the video I simply let the wind take the iris wherever it wanted so I have no interaction with the controller. I way trying to illustrate how it has the jitter without any interaction from me.
Would you mind pointing out a section of the video where you do that. ie. from x to y seconds in. I just want to make sure we are looking at the same thing.
I do have the black dampners installed and even tried the earplugs but didn't see any improvement so I removed them.
Have you tried the grey dampners that came with the DYS? Personally I use the black, but maybe in your temperature/atmosphere the grey will work better. As I mentioned previously, what I see in that video isn't so much "jitters" as it is sloshing (for lack of a better term). I could be completely wrong about this, but maybe the DYS grey dampers will work better.
I haven't calibrated the imu/6 point ever so I will try that. I may also experiment with the pid settings if that doesn't work since I can always reload the settings
The best tip I got was from a pro who gave me the rule of thumb, regardless of gimbal or any other setup, recalibrate your IMU every few hours of flight time (I do it every 8 hours) or every 2 days - whichever comes first. Also, the ESC calibration is easy and quick, so thats worth it. The compass calibration is a different story. Sometimes if the compass is just a little off, I think you can get some weird little jiggling even though you don't get the full toilet bowl effect. It could just be in my head though. Anyway, I finally got my compass dialed in really tight, and now I don't mess with it (though I might when I travel).
I was wondering Erik if you are totally happy with yours as I got the impression it was better than trot but not totally smooth.
I'm actually pretty happy with it. Its not perfect unless there is literally no wind. But its good enough that I can always make final tweaks in post to get the footage stable and clean. I may have linked to this video earlier in this thread, but it was all shot while I learned the Iris+ using the DYS gimbal. Its a practice video, but I was pretty happy with the results. I have some other videos that I have to get permission to show, but this should give you an idea of what I think you can get. Notice how windy it is in the opening sequence (you can see the trees blowing starting at about 14 seconds in). I thought the Iris+/DYS/GoPro did a pretty good job. https://vimeo.com/121777897
Erik, great video!! Enough with the gimbal, I want to know about your processing/color correction/grading. Also, what kind of sharpening are you adding, is that all shot protune, 1080p/60fps? The picture was so crisp, I am having issues figuring out how to get a good image from my Hero 4 Silver.