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Gaza07:
22 Aug 2019 22:47:32
Sorted mate  ~~
Andy7:
22 Aug 2019 10:27:36
Sure. But basically, all the subjects are getting cut off.
Gaza07:
21 Aug 2019 18:14:54
Can you pm me a screen shot of what you mean
Andy7:
21 Aug 2019 12:15:41
Gaza - can you make the subject line section in the forum topic list wider? It's cutting off the subject field really short.
Andy7:
19 Aug 2019 09:14:20
Good for you!  ~~
DarkButterfly:
18 Aug 2019 19:13:57
Had another negative encounter, it's been a few years since the last one, just an uneducated ******, going on about drones being illegal yada yada yada.    :-/
Still that didn't spoil my flying time, had an absolute blast  ~~
Gaza07:
07 Aug 2019 19:52:01
ooooh mrs jones  :D
hoverfly:
30 Jul 2019 15:26:34
D.B. you tightwad.. :cool:
atomiclama:
29 Jul 2019 20:14:10
DB that just means you have shed loads of props in the first place ;-)
DarkButterfly:
29 Jul 2019 18:53:33
Just had a thought, even with all the crashing I've done, I haven't bought any replacement props in over a year ~~
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3d - Printworx

Printing 3d Forum

3 axis gimbal with 2 'alexmos' boards

Started by powerlord, Sunday,August 18, 2013, 17:15:17

Previous topic - Next topic

powerlord

So, here';s the video of where I am so far with my 3 axis attempt.

I have a martinez board and IMU running Alexmos code doing the roll and pitch, and an Alexmos board and IMU, running alexmos code doing the yaw.

Its taken a while to get it all working. And the gimbal I';ve been hacking wasn';t the best to begin with - I think even in 2 axis mode it wasn';t as stable as the rctimer one.

However, there u go.

Basically I just stuck a yaw motor onto the top of it - its far from ideal placement as while a long way back from the yaw rotational axis of the camera, but it seems to work ok.

I';ve been trying to get it smooth using narrow mode on the gopro - that being the least forgiving. But I can';t get rid of a little side to side vibration of 2 or 3 pixels.

I disconected the yaw motor and taped it up, but I still see it - so it';s not the yaw motor - just maybe too much or too little anti vibration damping - but I';ve tried earplug, elastic bands and demonic exorcism and still no joy. It';s not jello/rolling shutter, because I could stablise it in FCP and rid it completely which I couldn';t do if it was jello. So it';s just something to put in the tbd pile.

Since I have a true 3 axis gimbal ordered, it';s not worth spending any longer on this one.

However, it certainly eliminates the slight side to side yaw you get on the quad which is, after all the point of the 3rd axis.



stu

powerlord

Update on this:

- I';ve re-arranged things on the quad to bring the gimbal out in line with the motors and the battery at the back. Now I get no props/legs in the shots at all even when in wide mode.

this seems to have stabilised it a bit too, though I still get a bit of twitching.

There';s no doubt I am being picky here, as I looked at some of the ones I used to shoot with a regular servo gimbal and they are terrible. However, I want to get to 100%.

I have now got the mounting though so I can quick change the gimbals in about 30 seconds so will be easier to do comparisons between the 3 axis, and the 2 axis. I plan to do some more testing this weekend, and try to tweak the settings again. I was never really happy with the carbon fibre gimbal I';ve modifed even when it was 2 axis, so perhaps I';ll move the 3rd axis to the rc timer gimbal as I was always happier with the output from that anyway...