Simple AlexMos 8bit brushless gimbal controller from Viacopter - Page 13 - RC Groups
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Jan 25, 2013, 11:05 AM
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Who is Stabileye?


trim.BMtXfV (1 min 35 sec)
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Jan 25, 2013, 11:12 AM
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Quote:
Originally Posted by JussiH
We deliberately mounted the cam so the arms would be visible for the demonstration. The camera looks straight forward.The vid was done with a HeroHD in 720/60P which is the widest setting available on the HeroHD.

Mount it a bit more forward and looking down 10-15 degrees and you wont see the arms. GP3 also lets you set the FOV, so options should be good to avoid arms in the picture. I cant wait to try the 720/120P mode on GP3...should allow to make some stunning slomo videos.
Just a recommendation: try 1080p 60f or 2.7k 30f - much better than 720p 120f IMO due to less aritifacting. For youtube videos, it probably doesn't matter though
Jan 25, 2013, 11:29 AM
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more videos


Test №3 direct drive gimbal (4 min 28 sec)


Video of a russian guy that uses alexmos simplebgc on his gimbal. The camera is a canon 550

Another great video that shows what the simplebgc is capable of
Last edited by robin4; Jan 25, 2013 at 01:53 PM.
Jan 25, 2013, 12:22 PM
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Quote:
Originally Posted by milo12
Who is Stabileye?
It's Paul@SCC from the UK:
https://www.rcgroups.com/forums/show....php?t=1817209
Jan 25, 2013, 12:29 PM
Friend is a 4 letter word...
JussiH's Avatar
Quote:
Originally Posted by flitelab
What size lipos are being used on the test gimbals so far? 3S or 4S? How is the power consumption?
We used a 460/3S in the video. I didnt measure the current yet, but its gonna be in the mA range for sure. According to Alex, a 2S should work well in this size.

Theoretical upper limit for the HW is some 20V/2A per motor, but things will get very hot and likely fail at those loads...we are probably gonna say somewhere in the 2-4S <1A range as "safe", but we need further tests to determine the final rating.
Jan 25, 2013, 12:31 PM
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Quote:
Originally Posted by JussiH
We used a 460/3S in the video. I didnt measure the current yet, but its gonna be in the mA range for sure. According to Alex, a 2S should work well in this size.

Theoretical upper limit for the HW is some 20V/2A per motor, but things will get very hot and likely fail at those loads...we are probably gonna say somewhere in the 2-4S <1A range as "safe", but we need further tests to determine the final rating.
Ah nice, that isn't too bad at all. Just wasn't sure how these motors handled with how they are being used. Thanks.
Jan 25, 2013, 01:19 PM
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~>Miha<~'s Avatar
Only 2s-3s required?! So then these rewinded BL motors work with pretty low voltage. How comes the Maxons that are used on the Zenmuse require high voltage (6s) to work at all and still have very little torque? Okay, the Maxons have optical enoders, right, and the ones on the Zenmuse are supposed to have 0.05 of dynamical pointing performance. How you guys are able to get this with these rewinded motors, low voltage and no optical encoders (okay, dedicated IMU) is amazing to me.
Jan 25, 2013, 01:20 PM
recep
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As I can see from robin4's video this controller can handle motors for a 700 gr camera so it handle a nex5 or gh2 am I right?
Jan 25, 2013, 01:22 PM
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Hi,

we use 3S and also Polaris mini FPV bec from Gryphon ( 12v bed), very useful when using 4S to 6S powerplants. .

the current on the motors depend on the weight, inertia but also a lot of the gains settings. As per Alexmos recommendations, for such small motors, 1,5A without active cooling is a maximum to allow, with cooling it can be eventually up to 2 A.

The motors drivers can handle up to 7,1A each (datasheet) and have overcurrent / temperature / voltage protection.

The basics informations are on simplebgc.wom, use the Russian language and google translate as all pages are not yet translated into english ( i'll try to do it over the week end so Aleksey can update his website).

Best regards,
Fabien
Jan 25, 2013, 01:22 PM
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bump
Last edited by robin4; Jan 25, 2013 at 01:53 PM.
Jan 25, 2013, 01:36 PM
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Quote:
Originally Posted by robin4
Not my video guys, just an upload from youtube - The guy calls himself provada1

http://www.youtube.com/user/provada1?feature=g-subs-u
Please don't clutter this thread and post videos without further info.
That's confusing.

At least tell the audience what's on the videos you post here. Some might have been under the impression that this was another flight video of Jussi's BLG.

Thx in advance.
Jan 25, 2013, 01:44 PM
Je Suis Turkana Boy
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Quote:
Originally Posted by kinderkram
Please don't clutter this thread and post videos without further info.
That's confusing.

At least tell the audience what's on the videos you post here. Some might have been under the impression that this was another flight video of Jussi's BLG.

Thx in advance.
What IS it a video of?
Jan 25, 2013, 02:00 PM
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Quote:
Originally Posted by kinderkram
These are rubber grommets. Industry uses them in all different shapes for vibration damping, isolation or protection of wires and mechanics on moving or shaking units.

Yeah but most bobbins are meant to dampen in compression while those appear to be mounted for tension which is what Im curious about.
Jan 25, 2013, 02:34 PM
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Quote:
Originally Posted by epyonxero
Yeah but most bobbins are meant to dampen in compression while those appear to be mounted for tension which is what Im curious about.
Can't tell you if this is a proper solution for vibration damping or if this will cause even more troubles in certain situations.
At least you will need another plate to attach it to...
Jan 25, 2013, 02:42 PM
Registered User
JussiH: Hey! Maybe a bit offtopic, but do you mind sharing your autoquad setup? Im thinking about building a similar hex.

What kind of booms (length) and landing gear are you using on your FCP HL frame? Do you have any building pictures etc of it? What is your average flighttimewith 4S 400mAh and the gimbal?


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