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RONIN-S | HORIZONTAL LEVEL | PLEASE HELP
898 17 2018-10-27
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proctorvision
lvl.2
Canada
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Hello,

I recently noticed my Ronin-S can no longer find and maintain horizontal level. The camera is perfectly balanced when powered off and shows excellent balance on all axis when powered on. I am fairly experienced with gimbals having owned the Ronin-M for almsot 2 years. I have tried restore gimbal setup, system calibration, rebalancing camera, changing firmware version, smooth track on and off. The issue seems to get worse with continuous use even after double tapping the trigger. I can't find what is causing this issue or how to fix it other than applying push on the roll access and manually adjusting. This is obviously not a practical fix. I hope this is just something simple I am overlooking. More details and video example are below.

Equipment & Firmware:
Panasonic GH5 Version 2.3
Leica 8-18mm Version 1.0
Ronin-S Version 1.5.0.40
App Version 1.1.4(113)

I made a video of a test I conducted to show the issue. I conducted the same test with the same camera and lens on the Ronin-M to conclude the camera is not the issue.

Video Example:

Any help to resolve this issue would be much appreaciated.

Thank you,

Chris
2018-10-27
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proctorvision
lvl.2
Canada
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Is anyone else having this issue?

I have contacted customer support, they reviewed the video and acknowledged it should not be performing this way. They recommended trying to reset the joint angle which I did but it only fixed the problem temporarily. Once I double tap the trigger or move around with the Ronin the roll axis loses level again.
2018-10-31
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Ulysses
Second Officer
Flight distance : 155503
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So probably a firmware issue?
2018-11-1
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Moshe.mmm
First Officer
Israel
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I noticed the same behavior with gh5s. The level green line on the  screen loses it's horizontal alignment when I move with the ronin. Is it the same with all of your gh5's cameras guys?

2018-11-1
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proctorvision
lvl.2
Canada
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Ulysses Posted at 11-1 05:21
So probably a firmware issue?

Thats what I'm leaning towards but I would suspect it would be happening to more people if it were something in the firmware. When I spoke on the phone with DJI they said they were forwarding the video I made to the engineering department to investigate. Who knows how long that will take... It's back to the Ronin-M in the meantime for me.
2018-11-1
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proctorvision
lvl.2
Canada
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Moshe.mmm Posted at 11-1 14:05
I noticed the same behavior with gh5s. The level green line on the  screen loses it's horizontal alignment when I move with the ronin. Is it the same with all of your gh5's cameras guys?

The green level line on the GH5 is losing level because the Ronin is not holding the camera level. I doubt it is only a GH5 issue unless it is something with the way the GH5 itself is weighted that is causing the Ronin to horizontal drift.

Anyone having this issue on other camera?
2018-11-1
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bob_angie
lvl.4
Flight distance : 97999
United States
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proctorvision Posted at 11-1 15:24
The green level line on the GH5 is losing level because the Ronin is not holding the camera level. I doubt it is only a GH5 issue unless it is something with the way the GH5 itself is weighted that is causing the Ronin to horizontal drift.

Anyone having this issue on other camera?

Is the camera connected to the gimbal via USB-C or is the Ronin just operating freely? I'm not suggesting it should operate this way one way or the other, but it would be nice to know if it's linked to using the camera. If it is connected to the camera, does it only happen with the camera is recording? or does it happen even when the camera is not recording? There is a known bug with the GH5 and the Ronin-S when recording on low-end SD cards.
2018-11-1
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proctorvision
lvl.2
Canada
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This problem is still occurring even after the latest firmware update. It happens regardless if the camera is connected or unconnected to the Ronin or if it is recording or not. I was really hoping the issue would be resolved in the latest firmware update as I have had to go back to using the Ronin-M.

Any other ideas of how to fix this issue?
2018-11-27
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Flo the Pirate
Second Officer
Austria
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the only thing I am seeing is that the roll axes is taking the most power (3)  that means balancing ist not as good as the other two axes ... also does your ronin M have gps connection - your ronin s probably doesn´t have the new gps module yet what would help a lot to keep perfect horizon ... just my two cents
2018-11-27
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proctorvision
lvl.2
Canada
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I don't believe the Ronin-M has a GPS connection... I certainly haven't made any alterations to the unit. I just tried using my Canon 80D on the Ronin-S and I get the same issue. I obviously completely rebalanced for the Canon and I have lots of experience balancing gimbals so I don't think the balance is the issue. Could it be the roll motor has an issue? It's almost like there is a trim on the roll axis.
2018-11-28
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astarmess
lvl.1
Russian Federation
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I have the same issue. ronin holds the horisontal level in wrong position. I've applied the latest firmware. theres no result
2018-12-1
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proctorvision
lvl.2
Canada
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I am sending my unit into DJI for further analysis and hopefully a resolution. I will keep you posted on the outcome.
2018-12-4
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Mabou2
First Officer
Flight distance : 247270
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United States
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Hi Chris.  You made an incredible video to illustrate the problem.  That said, I want to make a small suggestion to help you should you decide to do a test like this again.  There are two small issues with your video that diminish the results of your findings.  The warping of your lens makes it more difficult to see the tilt because straight lines near the top and bottom of the frame have an arc.  Maybe next time use at least a 50mm lens.  but the biggest issue is that (at times) you end up not looking straight at the wall, you are looking down the wall, which gives all of your lines a parallax distortion.  Next time, measure a distance from a side wall, let’s say 10’ and place a vertical marker on the wall and a horizontal marker to make a cross.   Then measure 10’ from that same side wall to the camera placement, and maybe mount the ronin on a tripod for the duration of the test.  This way we can see exactly how far off the balance is when you return the camera to the centerline on your wall.
2018-12-8
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proctorvision
lvl.2
Canada
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Mabou2 Posted at 12-8 07:10
Hi Chris.  You made an incredible video to illustrate the problem.  That said, I want to make a small suggestion to help you should you decide to do a test like this again.  There are two small issues with your video that diminish the results of your findings.  The warping of your lens makes it more difficult to see the tilt because straight lines near the top and bottom of the frame have an arc.  Maybe next time use at least a 50mm lens.  but the biggest issue is that (at times) you end up not looking straight at the wall, you are looking down the wall, which gives all of your lines a parallax distortion.  Next time, measure a distance from a side wall, let’s say 10’ and place a vertical marker on the wall and a horizontal marker to make a cross.   Then measure 10’ from that same side wall to the camera placement, and maybe mount the ronin on a tripod for the duration of the test.  This way we can see exactly how far off the balance is when you return the camera to the centerline on your wall.

Hi Mabou,

Thank you for the input and taking the time to watch the video. I agree looking back that there were some things I could have done to make it more exact. I understand there is inherently some lens warping with the wide angle but when I use the Ronin-M with the same lens and camera as shown at the end of the video I don't have any problems. I am hoping to have answers soon from DJI once they have a look at the unit.

Thanks again
2018-12-9
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Oliprudo
lvl.1
Canada
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I have the same issue using a Sony A7 III. Even if I install the last firmware (2019-11-29) and restore and rebalance my setup. The ronin still leans to the left.
This issue came 2 monts after using it and after the 2018-11-30 firmware update, maybe a coincidence.
It's very frustrating.
If someone already had and solved this issue, please let me know.

Thanks
1-5 11:20
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Oliprudo
lvl.1
Canada
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I downgrade to the first firmware version (2018-05-29) and the issue dissapear.
Then I re-install the last firmware version (2019-11-29) and the issue re-appear.

It seem to be a firmware issue. Could you test this?
1-5 11:55
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Mabou2
First Officer
Flight distance : 247270
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United States
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proctorvision Posted at 2018-12-9 11:17
Hi Mabou,

Thank you for the input and taking the time to watch the video. I agree looking back that there were some things I could have done to make it more exact. I understand there is inherently some lens warping with the wide angle but when I use the Ronin-M with the same lens and camera as shown at the end of the video I don't have any problems. I am hoping to have answers soon from DJI once they have a look at the unit.

Hi Proctorvision, whatever came of DJI reviewing the issue on your Ronin-s?  Please share.  Thanks buddy.
1-18 08:14
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djiuser_vEosLhlyLQcQ
New
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At least for me I spent an hour trying to figure out the horizontal level issue from the camera display and what it ended up being was the slop in the speed booster I was using since I connect the gimbal to the speed booster.  By turning the camera body separately I was able to achieve the correct horizontal level. See pics below.
2-11 17:25
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