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Post by JohnC on Jan 20, 2014 19:18:36 GMT
Hi Kari: You need much more I in there. I would say minimum 25. Increased the I-Angle to 1.5 for now to be safe. Also did you try changing the motor voltage ? - though 4.3 seems reasonable for tilt.
This is the Tilt+Roll config for my handheld mount with a NEX-5 on it. Give it a try and see if it helps : HHMount(T+R).bld (180 B)
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kariy
Gimbal Cleaner
Posts: 13 
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Post by kariy on Jan 20, 2014 20:49:12 GMT
Wuhuu, progress here. Key value i was looking for was increasing I angle to 15 so i can increase I over 20. I tried earlier with 16 but it did not work at all, neither now if i put 16, for some reason it goes nuts but 15 and voila! Still compensation lagging slightly behind but quite close to really good already, so close that could do a flight test with these settings. Well still pan axis to go..   |
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katya
Gimbal Cleaner
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Post by katya on Jan 20, 2014 21:03:18 GMT
Hi Kari I am using 5208 180T motors with Black Magic Pocket Camera. I am getting smooth results so I have posted my setting in case they are of any help. Katya Kat PBM Tilt & Roll 4.bld (180 B) |
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Post by JohnC on Jan 21, 2014 7:13:23 GMT
Kari : I is the key, but 15 is very high for the I Angle !. You get much better result the lower you can get the I Angle : what is the lowest you can go, and what happens which makes you stop ?. My gimbals are running at 1 degree or less on tilt.
Tilt is always the hardest axis to tune. Pan is usually easy in comparison. It all depends on how much mass the motor is turning - the more the better.
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kariy
Gimbal Cleaner
Posts: 13
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Post by kariy on Jan 21, 2014 20:40:18 GMT
Kat: Thanks, but BLD driver cannot open the file for some reason. Can you please post screenshot of your settings? John, i can lower it to 10, but if i lower it to 5 for example, it starts bouncing when hit the gimbal. If i then increase D to stop bouncing, it starts jitter. Neither can find working I value. Can't really find sweet spot if I angle is lower than 10. Also found out, even with high I-angle values it starts high frequency vibration if hanging gimbal in air. I will try tomorrow with 5108 which arrived today, (Thanks for Kopterworx for 1 day shipping from Slovenia to Finland Just to make sure problem is not in motor itself. It's funny that roll axis was always the pain when tuning servo based gimbals and tilt was always the easiest, and with BL tilt seems to be always the trickiest one. Best, Kari |
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Post by JohnC on Jan 21, 2014 21:10:34 GMT
Kari: The data type for I Angle changed not too long ago and I wonder if you have the old version of the PC app. It seems sometimes windows does not overwrite with the new version. Can you uninstall the BLD driver software manually the install the latest version ?. It should be 1.01 (Help->About). If you have the old one, your I Angle will change when you connect to the BLD module with the new one.
These are the settings for an RC-Timer handheld mount with Sony NEX-5:
Attachment Deleted |
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Post by JohnC on Jan 21, 2014 21:14:16 GMT
Kari: Can you check you have the latest BLD PC firmware : it seems windows does not always overwrite an existing installation. Can you manually uninstall the BLD app then install the latest one just to be sure ?. If you were running the old one, the I Angle should be different as the data type changed.
This is the config for an Rc-Timer handheld gimbal with a Sony NEX5
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colin
Gimbal Cleaner
Posts: 8
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Post by colin on Jan 21, 2014 22:18:33 GMT
These are my settings for Sony CX410VE using RC Timer gimbal 22pole on tilt and Roll 14pole on Pan. sony cx 410ve Pan.bld (180 B) sony cx 410ve T+R.bld (180 B) these are not perfect settings John i"ll have a go at uping the I |
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colin
Gimbal Cleaner
Posts: 8
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Post by colin on Jan 21, 2014 22:56:41 GMT
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kariy
Gimbal Cleaner
Posts: 13
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Post by kariy on Jan 22, 2014 8:28:24 GMT
John,
I had 1.01 but updated BLD driver anyway and manually deleted earlier install. I also replaced the tilt motor but exactly same behaviour. Not even slightest difference to old 5208, so problem is not in motor. I also double checked all mechanical components are tightly secured and there is no tensions in gimbal construction, all is very straight and axis is in very good balance and moving freely. Roll and Pan are working reasonably well but also bit slow. If i put your settings on my bld, it's just so much way off that could never work, just jittering, vibrating and bouncing around. Could there be problem in my radian? I doubt but running out of ideas. Is there a way to check imu data ok? Should i try manual radian calibration? I doubt it either has nothing to do with high frequency vibrations.
Best,
Kari
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Post by JohnC on Jan 22, 2014 8:36:36 GMT
Kari, let's go back and forth with this over email then come back here with the conclusion ... I sent you an email
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colin
Gimbal Cleaner
Posts: 8
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Post by colin on Jan 28, 2014 1:00:34 GMT
I've been Following Kari post. What was the outcome?
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Post by JohnC on Jan 29, 2014 21:16:40 GMT
Colin: the reason is as yet unknown : it's a bit tricky to diagnose from this distance. There is a new BLD firmware about to be released which has some extra tuning facilities and fixes some issues which may have been a factor - though experience up to now has taught me that if it can't be tuned out, it is usually something to do with the physical installation. I will put the new firmware in your system when we meet up next week and sort it out from there.
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colin
Gimbal Cleaner
Posts: 8
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Post by colin on Jan 30, 2014 0:04:45 GMT
Thanks John, looking forward to meeting up.
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colin
Gimbal Cleaner
Posts: 8
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Post by colin on Feb 4, 2014 22:10:16 GMT
John good to meet today. Forum subscribers note our issue was the location of the glock. We had it attached in the line of the tilt motor on the tilt motor axis. Our problem was we could not tune out a small vibration that kept appearing. In the end we moved the glock to a position further away from the tilt brushless motor and hey presto we could tune the vibrations right out.
John a great session today. Advice to all users. Check the mechanics of your setup before assuming a software issue. The glock is very very sensitive. Ours was picking interference from being closely connected to the drive motor. Moving it to another location cured the issue and we were able to tune within 30 minutes.
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