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3d - Printworx

Homebrew 2 axis brushless gimbal (for xugong or disco)

Started by flybywire, Monday,June 23, 2014, 20:44:29

Previous topic - Next topic

flybywire

As with many aspects of this hobby, there';s usually more than one way to skin a cat, so to speak (sorry feline lovers, unfortunate turn of phrase) meaning that if you want or need to achieve a specific end goal, sometimes the only way is to roll your sleeves up and do it yourself!  I';m referring here to my ambitions of getting somewhere near stable footage from my xugong quad, documented on this here very forum  ::)
So, a couple of weeks ago, I decided to poke around t';internet to see what the cheapest options where.  You know how it is, especially with ebay, no sooner have you pushed the proverbial button on an object of desire, congratulating yourself that you have located the cheapest offering on the planet, they then stick an advert for the same item, but £5 cheaper!!!  Where did that come from???

Anyhow, tight as I am, I couldn';t moan at £15 for a Martinez style clone controller board, complete with power cable etc, in pristine newness, especially as I paid twice that sum around 8 months on the same ebay, from China, and that one looked like it had been around the block several times!
This was advertised as UK stock, but had a Chinese vendor, so not sure what';s happening there, but turned up in about 4-5 days.

I hooked the board up to the software app (you know the one) I';ll not go into details here, I calibrated it, and it works great, that';s all I';m prepared to say!  I';m not really going to do anything complex with software here, but may need to go back in to adjust motor power settings and the odd pid here and there, so be it.

Here';s a pic of the parts so far, total = £20, which includes a cheap ';frame'; for the GP, which I figure is the lightest way to stick one to a gimbal.




I have two 2206 brushless motors on the way from HK international WH, that knock out at £18 posted.

I have plenty of aluminium left over from another project, so once the motors arrive, it';s off to work we go!

I did toy with the idea of buying a cheapo ready made Chinese offering, as they can be found for around £45 these days, but it would need drastic modification, as the frame is fairly unique, so felt a DIY job was called for, what the heck it';s all part of the hobby.

More when the bad boys show up....

Slightly more info and sandwiches at: http://ajwillis303.wix.com/stuff#!brushless-gimbal-build/c1v9c
Blog: [url="http://ajwillis303.wix.com/stuff"]http://ajwillis303.wix.com/stuff[/url]
The spiritual home of fpv large
Keep it emax, capiche?
Hardware? sure, I got hardware!

flybywire

Here they are at last, delivered unceremoniously onto our doormat in a jiffy bag, by our temp post woman (mobile phone clamped to her head as she shoved the bag through the letterbox).  Ah well, at least they';re here, I think HK are economising on their packaging. :o



Nice little motors these, not particularly dear either.  I seem to have my hands full of late with a number of projects on the go at the same time, but when you order from China, you need to think 3 weeks ahead.  ;)

I may get a chance to bend some metal tomorrow (once I';ve assembled the latest round of Ikea purchases)... :thumbdown:
Blog: [url="http://ajwillis303.wix.com/stuff"]http://ajwillis303.wix.com/stuff[/url]
The spiritual home of fpv large
Keep it emax, capiche?
Hardware? sure, I got hardware!

flybywire

I hope to keep this gimbal as simple as possible, so I';m mounting the cheapo ';Frame'; directly to the motor (after first ascertaining the balance point of the camera/frame).  I then dremeled off the old fixings, as these were no longer required.  The camera is such a fit in the frame that I can';t see it coming out of it';s own volition really.


Now the mounting holes:



Next task is to bend up some stock aluminum for the arm.  I had the notion of fixing the fpv cam to the other side of the ';frame'; , but decided against it for various reasons. 

On the down side, I have discovered a loose piece of winding in the motor, which may or may not affect the working of the motor.  It looks like another support request to dear HK.
Blog: [url="http://ajwillis303.wix.com/stuff"]http://ajwillis303.wix.com/stuff[/url]
The spiritual home of fpv large
Keep it emax, capiche?
Hardware? sure, I got hardware!

flybywire

The m 2x4mm hex countersunk bolts just arrived from Boltbase http://stores.ebay.co.uk/boltbase/ (a great supplier of all things bolty), so I spent part of my lunchtime assembling the ';frame'; to the motor.  As per usual, my hole drilling left something to be desired, but after a tadsworth of adjustment, hey presto!




Ideally I';d have a piece of black anodised ally for the arm, but I';ll likely opt for the old school plain polished look.  :smiley:

Balances quite well so far.

P.S I';ve been on to HK, sent them a piccy of the loose winding, another motor on its way.
Blog: [url="http://ajwillis303.wix.com/stuff"]http://ajwillis303.wix.com/stuff[/url]
The spiritual home of fpv large
Keep it emax, capiche?
Hardware? sure, I got hardware!

flybywire

I seem to be very busy lately, not sure it fits in with my laid back lifestyle, and on occasions I';ve got dangerously close to multitasking, which is, as we all know not a male trait.  ;)

I';ve just finished the gimbal arm, a leftover piece of 25mm aluminium.  I had the idea of cutting a hole for the motor cable, seemed like a good idea!



I managed to get it to balance pretty well, I think the ';frame'; needs a tad of weight at the bottom, if truth be told, but not much, maybe a 1p perhaps?  Of course I need to mount the sensor first!


All I need to do now, is to cut two G10 plates which will use the rubber balls to hold it all together.
If I were somebody who knew what they were doing,  I would replace the existing bulkhead with a bespoke one, but I';m not, so I';ll likely cable tie the gimbal to it.


Blog: [url="http://ajwillis303.wix.com/stuff"]http://ajwillis303.wix.com/stuff[/url]
The spiritual home of fpv large
Keep it emax, capiche?
Hardware? sure, I got hardware!

Gav

That';s brilliant, matey.  Who needs a 3d printer hehehe

the simple but well thought out (probably lol) designs are the best - Looks really neat!
cheers
Gav

flybywire

Quote from: Gav on Friday,July 11, 2014, 21:02:37
That';s brilliant, matey.  Who needs a 3d printer hehehe

the simple but well thought out (probably lol) designs are the best - Looks really neat!
cheers
Gav

Ta mate, you';ll be t'; first to know if it works  :smiley:
Blog: [url="http://ajwillis303.wix.com/stuff"]http://ajwillis303.wix.com/stuff[/url]
The spiritual home of fpv large
Keep it emax, capiche?
Hardware? sure, I got hardware!

flybywire

I';ve modified the Xugong bulkhead, mainly to accommodate the Naza wires, give them some breathing room so to speak.  It will also allow me to cable tie the gimbal on.



Funnily enough, here';s a little example of the power of the internet;  I couldn';t find my drawing set & protractor anywhere, so after a little head-scratching, I managed to print one off!



A prit stick & some card, and I is Pretty chuffed!

Tomorrow, I will attempt to liberate the two piece gimbal mount from the G10/FR4.
Blog: [url="http://ajwillis303.wix.com/stuff"]http://ajwillis303.wix.com/stuff[/url]
The spiritual home of fpv large
Keep it emax, capiche?
Hardware? sure, I got hardware!

flybywire

Well, another evening spent cutting G10 for the gimbal backplate, a tortuous routine at any time, then the extremely fiddly task of inserting the rubber ball anti vibe mounts on to the plates, and It was finally ready for the software part.

So after I';d cable tied the whole shebang on to my Xugong10, I loaded up the SBG 2_2b2 GUI (hadn';t used it for a while, so had to familiarise myself with it again!) then connected the gimbal & controller via USB. 

I had connected the board shortly after I received it, so I knew it was working.  It appeared ok  in the GUI, so I hooked up a lipo; moment of truth!  Oh dear, it did that wild erratic dance thing, so I unhooked it and scratched my now bald head.
I noticed that the sensor X axis was inverted, which I had altered (as my sensor was facing downwards) but had failed to click ';write';!
Once done, it started to read correctly, so I reconnected the lipo, and much to my simple amazement, it just sat there working perfectly!

Once the thrill of success had abated a tad, I did adjust a few things, like calibrating the gyro & IMU, I also upped both motor outputs to 125 (def 80).
One more thing: I also ran the auto motor sense feature, which sends current to the motors to determine a bunch of stuff like motor pole count, power, and orientation of the actual motors, i.e pitch/roll.  Well god bless it I say, as it worked a treat!

That';s about it, oh yes, it was slightly out of balance, so I stuck a coin on the side, which is slightly too heavy, so is work in progress.

I';m soooo chuffed, I';ve included an obligatory video clip of the eureka moment:

Gimbal test! from Andy on Vimeo.</p>

Just have to mount the controller board now, and tidy up the cables (and hook up manual tilt from Tx dial), although there';s not much room left at the inn on this wee beasty!

Happy days.
Blog: [url="http://ajwillis303.wix.com/stuff"]http://ajwillis303.wix.com/stuff[/url]
The spiritual home of fpv large
Keep it emax, capiche?
Hardware? sure, I got hardware!

flybywire

#9
As well as smashing my Gaui 425 into a tree at the weekend, I did manage some positive stuff as well.   :whistling:
I took my Xugong 10 over to Farndon with the intention of flying out to the ';Judith Stone'; again, as I did with my original Chinese gimbal a year or so ago.
Unfortunately, when I got there, and after I had walked a few hundred yards across the first field, up the hill to the launch position, I soon realised that I had forgotten to tighten the lens on my fpv cam, after I had removed it from the old mount.  Basically, everything beyond 6ft was out of focus!  Doh!  :angry:  One of those days I guess.

As an aside, I have ordered a £12 mini cmos fpv cam from BG in China, if it works ok, I';ll stick it on the side of the gimbal in place of the counterweight.

But I did fly LOS for a couple of minutes, and set the GoPro recording, just to see if it was an improvement.
Well, after reviewing the footage, it really is a whole lot better.  I';ll add a clip later when I get home.

I notice ';Sander'; from Immersion RC has a brushless gimbal on one of their Xugon';s, and looks like a modified stock Chinese affair.  Interestingly enough, it is direct mounted, and I';m thinking that I needn';t have bothered with the anti jello mount, as it should be vibe free anyhow.  Also, my mount seems to add the occasional tremor as the wind hits the gimbal, so I';ll go back to the drawing board a little.
I still like the way I';ve attached it to an extra plate on the front, which does allow for more room inside.
I';ve just seen a post on RC groups saying there is not enough room to get standard equipment inside, poor chap, he';s not had the best of luck with his, he';s rigged up a humungus dampening system on top, says it wouldn';t fly without!!  Well all I can say is, it is tight inside, but I managed it ok, and this thing flies so sweetly a baby could fly it!  I was going to add a response to his post, but you know what?  I couldn';t be asked, there';s no telling some folk!   :laugh:

Laters!

P.S Ah yes, also, I seem to have lost the ability to connect USB to the board to make adjustments, which is slightly annoying.  It was fine until I servo taped it to the underside of the quad.. :hmm:
Blog: [url="http://ajwillis303.wix.com/stuff"]http://ajwillis303.wix.com/stuff[/url]
The spiritual home of fpv large
Keep it emax, capiche?
Hardware? sure, I got hardware!

flybywire

Here';s minute or so of the first gimbal test footage.  I have now removed the anti vibe plate and opted for a more simple direct approach.
Xugong gimbal test from Andy on Vimeo.</p>

Yes, there are some slight wobbles, but I believe caused by the anti vibe ';ring'; itself.

And here';s a couple of close ups.  I think it worked out very well, manual tilt is spot on!










Blog: [url="http://ajwillis303.wix.com/stuff"]http://ajwillis303.wix.com/stuff[/url]
The spiritual home of fpv large
Keep it emax, capiche?
Hardware? sure, I got hardware!

guest2350

very nice write up mate, this now has me on a mission to get one or make one..
I think I`m gonna order a controller from ebay now.  ::)

flybywire

Quote from: jamie16v on Monday,July 21, 2014, 22:56:21
very nice write up mate, this now has me on a mission to get one or make one..
I think I`m gonna order a controller from ebay now.  ::)

Thanks Jamie.  Glad you liked it! 

Yes, no reason not to make one yourself.  I still don';t know why my board refuses to talk thru my USB cable(s) tho!
I guess it';s not the end of the world, as I';d already set it all up, and the manual tilt works too, which is a huge addition.
I find it a distinct advantage to have the fpv cam see exactly what the GoPro does, especially the tilt looking down, I guess a head tracker would be the luxury option, but that';s another day';s headache!

Cheers

P.S If you do go ahead with your own, one mod would be to have slots for the motor mounting holes to allow for some lateral movement for balancing, not essential, but if you want 100% balancing on both axis, then slots would be preferable.
Blog: [url="http://ajwillis303.wix.com/stuff"]http://ajwillis303.wix.com/stuff[/url]
The spiritual home of fpv large
Keep it emax, capiche?
Hardware? sure, I got hardware!

flybywire

I know one or two of you are using these boards, and setting up your own gimbals, so I';d like to pass on all the info that I have been given on the subject.


As well as the attachments below, this resource is stellar when when setting up these boards: http://www.itsqv.com/QVW/index.php?title=How_To_-_Martinez_Brushless_Gimbal_Controller_Set-Up

Profile file at: https://www.dropbox.com/sh/hf4ehcdkidq36hv/AADxWVZj1WGcmsXmzpSvAzUWa
Blog: [url="http://ajwillis303.wix.com/stuff"]http://ajwillis303.wix.com/stuff[/url]
The spiritual home of fpv large
Keep it emax, capiche?
Hardware? sure, I got hardware!

weavo56

Could you mount the pitch motor on the other end of the camera frame  ?
This would open the connections to the camera for fpv and to charge the camera .

Graham
fpv250 ,alien 330,450 , Reptile 550 all Naze32 FC's
DJI F550 hex , OSD , fpv .
Bixler 2 , Go discover wing .
Turnigy 9XR , Telemetry display.
Taranis X9D,

flybywire

Quote from: weavo56 on Sunday,July 27, 2014, 12:59:25
Could you mount the pitch motor on the other end of the camera frame  ?
This would open the connections to the camera for fpv and to charge the camera .

Graham

Ah, I see what u mean, yes of course, I was going to mount it that way, but changed my mind, as I wanted to use a separate fpv cam for this quad.  I could use an edge connector on the back, as it is with the H3-2D.

Andy
Blog: [url="http://ajwillis303.wix.com/stuff"]http://ajwillis303.wix.com/stuff[/url]
The spiritual home of fpv large
Keep it emax, capiche?
Hardware? sure, I got hardware!

weavo56

Ah yes I';ve got one of those somewhere  :smiley: . Have you used them before on a gopro ?

Will be making a rig like yours very soon , I have an alien 450  ready just waiting for motors and controller board to arrive .
Nice work mate , like it .

Graham
fpv250 ,alien 330,450 , Reptile 550 all Naze32 FC's
DJI F550 hex , OSD , fpv .
Bixler 2 , Go discover wing .
Turnigy 9XR , Telemetry display.
Taranis X9D,

flybywire

Quote from: weavo56 on Saturday,August 02, 2014, 15:37:29
Ah yes I';ve got one of those somewhere  :smiley: . Have you used them before on a gopro ?

Will be making a rig like yours very soon , I have an alien 450  ready just waiting for motors and controller board to arrive .
Nice work mate , like it .

Graham

Ta Graham!  D';ya mean the edge connector?  No, i haven';t (except for h3-2d) but i know they work well.  ReadymadeRC used to sell them, but they were always out of stock when i wanted one.  Cut a long story, my old gp white had issues outputting video for fpv from usb, but worked ok with the edge connector on the h3-2d gimbal.  I';ve never tried usb video out from the black, but no reason it wouldn';t work.

Good luck with the build, make sure u take pics and post it up here!
:smiley:
Blog: [url="http://ajwillis303.wix.com/stuff"]http://ajwillis303.wix.com/stuff[/url]
The spiritual home of fpv large
Keep it emax, capiche?
Hardware? sure, I got hardware!

Sweet Pickle

Think I need to take inspiration from this post as I need a solution for the Disco Frame I';ve ordered. There aren';t any after market options for TBS that I can see. The only thing that deters me is learning the gimbal software. .... and the fact I can';t fabricate anything if my life depended on it. I';m happy as a pig in the proverbial with a soldering iron but give me something to cut or bend and I';m completely out of my depth.
Great work and love the info toy provided here.

flybywire

Quote from: Sweet Pickle on Monday,September 29, 2014, 22:47:09
Think I need to take inspiration from this post as I need a solution for the Disco Frame I';ve ordered. There aren';t any after market options for TBS that I can see. The only thing that deters me is learning the gimbal software. .... and the fact I can';t fabricate anything if my life depended on it. I';m happy as a pig in the proverbial with a soldering iron but give me something to cut or bend and I';m completely out of my depth.
Great work and love the info toy provided here.
Glad you';ve been inspired SP!
Actually, the gimbal controller will likely work out of the box, with little intervention, just calibration.  As for the ';mechanics'; I would recommend searching for a 3D printed gimbal for TBS Disco, I just did a search myself, and there are a few options out there!  If you don';t have a printer, just ';shout'; here, and I';m sure some decent soul will assist you.  :smiley:

I did a search, this guy has a nice 3D printed TBS gimbal:
My TBS discovery setup with my 3D printed gimbal
Any questions or snags, just ask!



Happy gimbaling.
Blog: [url="http://ajwillis303.wix.com/stuff"]http://ajwillis303.wix.com/stuff[/url]
The spiritual home of fpv large
Keep it emax, capiche?
Hardware? sure, I got hardware!

dp106

I';ve been looking into getting a gimbal myself for the discovery, that does look good. Just need to find someone to print it  :smiley:

amboman999

Just been watching your video of the gimbal in action down at the Orford Castle Keep!
Great Job! It';s really smooth and no jitter at all!
You';ve caught a pretty good morning there  :wack0
QUAD 01
Frame: HK Colour 250
Flight Controller: Open Pilot Revolution (Librepilot)
ESC: 12A BHeli ESC
Motors: DYS BE1806-2300kv

Transmitters:
FrSky Taranis 9XD Plus

flybywire

Quote from: amboman999 on Tuesday,May 19, 2015, 16:31:14
Just been watching your video of the gimbal in action down at the Orford Castle Keep!
Great Job! It';s really smooth and no jitter at all!
You';ve caught a pretty good morning there  :wack0

Thanks, it was definitely my most memorable of flights to date.  Do you know the area?

Cheers

Andy.
Blog: [url="http://ajwillis303.wix.com/stuff"]http://ajwillis303.wix.com/stuff[/url]
The spiritual home of fpv large
Keep it emax, capiche?
Hardware? sure, I got hardware!

arturios

First time reading this thread  :whistling:
Really like your homebrew gimbal Andy, I am looking for a cheap gimbal at the moment and need one before I go to Avebury next month. I sadly wouldn';t know where to start making one like yours, well, more like I';m not equipped to build one.

Good video of Orford Castle, giving me ideas ~~

Rustydiver

It';s your fault you made me press the button and but two motors to have a go myself. I';ve already got a spare pre configured aeroxcraft control board.
Going to try and make a hand held gimbal for the go pro.
Long term project I';m in Italy next week so can';t play boooo.

Chippercheese

Quote from: arturios on Tuesday,May 19, 2015, 22:35:44
First time reading this thread  :whistling:
Really like your homebrew gimbal Andy, I am looking for a cheap gimbal at the moment and need one before I go to Avebury next month. I sadly wouldn';t know where to start making one like yours, well, more like I';m not equipped to build one.

Good video of Orford Castle, giving me ideas ~~

http://www.thingiverse.com/thing:158854

Plus 2 of these

http://www.goodluckbuy.com/index.php?target=products&product_id=99303

and one of these

http://www.ebay.co.uk/itm/BGC3-1-2-axis-Gopro-Glb-Cnc-Brushless-Gimbal-Controller-Board-Driver-Alexmos-/111422068013?pt=LH_DefaultDomain_3&hash=item19f145d52d


And you';ll be well on your way.
TBS Discovery + ghetto printed gimbal, HovershipMHQ 1 & 2, QAV250, Turnigy Talon V2, chinese Alien500 thingie, 3d Printed Tricopter, Bix 3, [url="//flyingwings.co.uk"]Flyingwings.co.uk[/url] FalconEVO, Venturi EVO 1+2, Hornet Racing Wing, Radjet800 (by the dozen)... Permanent sucker for FPV, and lots and lots of OpenLR

flybywire

Quote from: arturios on Tuesday,May 19, 2015, 22:35:44
First time reading this thread  :whistling:
Really like your homebrew gimbal Andy, I am looking for a cheap gimbal at the moment and need one before I go to Avebury next month. I sadly wouldn';t know where to start making one like yours, well, more like I';m not equipped to build one.

Good video of Orford Castle, giving me ideas ~~

Cheers Art, thanks for the pos comments mate, appreciated.  Avebury is a beautiful place perfect for fpv/video especially early morning, if you can hoik yourself out of bed!(the pub there is pretty good too!  :rolleyes:).  Gimbal wise, (they are really easy to make btw) there are a few 3D printed arms on the net, just bolt together & hook up to a Martinez board from the bay. 
I guess if you';re in a hurry, a cheapo clone from ebay would give equal results.  Price wise, you don';t save a fortune making them yourself, it';ll still cost you around £30 for board & motors.  Maybe somebody has one up on here for sale?
My gimbal works pretty well, but needs balancing, and a touch more power to the motors I think, as it can ';wobble'; at high speed.  I';m more of a builder than a tweeker, if you catch my drift, I get frustrated with the ';nuances'; of firmware/pid';s etc, not my scene really.   :shrug:
Blog: [url="http://ajwillis303.wix.com/stuff"]http://ajwillis303.wix.com/stuff[/url]
The spiritual home of fpv large
Keep it emax, capiche?
Hardware? sure, I got hardware!

flybywire

Quote from: Rustydiver on Wednesday,May 20, 2015, 08:00:00
It';s your fault you made me press the button and but two motors to have a go myself. I';ve already got a spare pre configured aeroxcraft control board.
Going to try and make a hand held gimbal for the go pro.
Long term project I';m in Italy next week so can';t play boooo.

Lol!  GReat idea Rusty, I guess a 3 axis gimbal would be top dog.  Do you have access to a 3D printer?

Andy
Blog: [url="http://ajwillis303.wix.com/stuff"]http://ajwillis303.wix.com/stuff[/url]
The spiritual home of fpv large
Keep it emax, capiche?
Hardware? sure, I got hardware!

Rustydiver

Quote from: flybywire on Wednesday,May 20, 2015, 08:58:01
Lol!  GReat idea Rusty, I guess a 3 axis gimbal would be top dog.  Do you have access to a 3D printer?

Andy

Yep I sure do I';ve just made one and still going thought the trial and error stages with it.
Just made a new front cover for my gimbal, the one Aeroxcraft supplied isn';t quite good enough, there is not enough room to fit a clear protective lens on the go pro when flying. For my first attempt at building something is came out damm good.

flybywire

Quote from: Rustydiver on Wednesday,May 20, 2015, 13:02:52
Yep I sure do I';ve just made one and still going thought the trial and error stages with it.
Just made a new front cover for my gimbal, the one Aeroxcraft supplied isn';t quite good enough, there is not enough room to fit a clear protective lens on the go pro when flying. For my first attempt at building something is came out damm good.

Sounds cool.  Tell you what, as I';m really into all this stuff, why not post some pictures of your build here?  The good the bad & the ugly!  It';s always useful seeing other folks take on things.l

A.
Blog: [url="http://ajwillis303.wix.com/stuff"]http://ajwillis303.wix.com/stuff[/url]
The spiritual home of fpv large
Keep it emax, capiche?
Hardware? sure, I got hardware!