Great deal on a 3 axis gimbal with Alexmos controller

Just had to tell all of you about this $59.95 three axis gimbal deal on EBay:

This seemed like a great deal and looks to be identical to DYS Gimbal on Hobbyking which is $200.00.

I got one and quality appears excellent though I haven't tried to use it yet (I will probably get another.) 

I'm planning on converting to a Storm 32 for a laser rangefinder scanner.

Apparently DSLRPros has moved on and is wholesaling them out.

http://www.ebay.com/itm/DSLRPros-3-Axis-Gimbal-for-the-GoPro-3-3-an...

I get nothing from anybody for this, but if you want a real 3 axis gimbal, this is the best deal you'll ever see.

Heres a link to the manual for the DYS: http://www.getfpv.com/media/wysiwyg/documentation/3AxisbrushlessGim...

Heres a link to the Basecam (Alexmos) Home page: http://www.basecamelectronics.com/

And a link to download the appropriate 8bit Alexmos Gui: http://www.basecamelectronics.com/files/SimpleBGC_GUI_2_40b7.zip

And a link to download the Alexmos manual PDF file: http://www.basecamelectronics.com/files/v10/SimpleBGC_manual_2_4_en...

(This does include the Alexmos 3rd axis expansion board.

Best regards to you all,

Gary

Views: 5800


Admin
Comment by Thomas J Coyle III on June 26, 2015 at 4:40pm

Nice catch, Gary.

I just ordered one. I have been to DSLR Pros office in Ft. Lauderdale as a consultant a while back. Interesting operation.

Regards,

TCIII AVD

Comment by Gary McCray on June 26, 2015 at 5:32pm

Hi Tom,

I am very happy with mine whether I toss the controller or not.

Quality seems very good, it seems a bit heavy for a Phantom, but mine is probably going to end up on my Stampede initially then on my 2 wheel robot doing things for which it was never designed in the first place.

I already have a Storm32 coming and it is what I am planning on using for my laser rangefinder scanner prototype.

Had to have a true 3rd axis (heading) for the X/Y scan capability.

I am sure the brushless gimbals will limit scan rate severely and eventually I'll need to upgrade to a stepper or servo-motor scan mechanism. but it should be great to start and much easier to interface and program.

It comes with all the interconnecting wires and mount hardware for a dual rod mount, but no printed material at all which is why I have included pretty much everything you need to know here.

The GetFPV site has a link to another version of the DYS gimbal manual and this is the site where I got the initial references:

http://www.phantompilots.com/threads/dslr-pros-maytech-gopro-gimbal...

I hate to see good deals get missed by the people I care about.

One thing to watch out for: At first it looked like they had used a slip ring through the yaw/heading axis motor, but it is just a motor hollow shaft  and although it is perfectly reasonable to go beyond 180 degrees, go too far and you could easily twist the leads off as there is no hard stop (which is what allows you to go beyond 180).

Best Regards,

Gary


100KM
Comment by Hein du Plessis on June 27, 2015 at 12:13am
Thanks for posting Gary. I was looking for a proper 360 degree gimbal so I bought this: http://www.rctimer.com/product-1344.html which seems a cheaper version of the Dys Marcia.
Comment by johnkowalsky on June 27, 2015 at 5:34am

Just out of curiosity... what kind of angular precision could you expect out of a brushless gimbal ? Could one you it for long range video shots ?

Comment by Euan Ramsay on June 27, 2015 at 7:22am

I'd like to know this too - i use a 30x zoom on a SAR rig, and can only get to 12-15x zoom before it starts bouncing; I', pretty sure it's a resolution issue at the gimbal - it's always the same, regardless of what you do with PID.


T3
Comment by Thorsten on June 27, 2015 at 7:35am

Too late: "This listing has ended."


T3
Comment by Thorsten on June 27, 2015 at 7:37am

...anyway, I am more interested in your "laser rangefinder scanner prototype". Sounds interesting! Any details so far?

Best regards,

Thorsten

Comment by Gary McCray on June 27, 2015 at 9:36am

Hope any of you who wanted one of these got one, apparently they sold out pretty fast after I posted it.

Probably worth checking DSLRPros Wholesale site on Ebay every once in a while, they have quite a bit of stuff, but none (now at least) as good a deal as this was.

@ Thorsten, I will publish more about the laser scanner in furture Blogs and on the Vision Systems page of my Drones Are Fun web site.

http://dronesarefun.com/VisionSystems.html

Brushless Gimbal resolution is limited by several factors, but primarily by the accuracy of the pole balancing circuitry, the power applied to the coils, the constant and dynamic force reguired (perfect balance), the mechanical play in the Gimbal and the resolution of the controlling PWM.

Typically they can stabilize better than they point, because the transmitter / receiver PWM is of more limited resolution and because with a balanced camera very little force needs to be applied to provide stabilization.

(Basically you are holding the camera still while allowing the airframe to move around it).

Well made bigger diameter motors with more poles will generally allow higher resolution movement and better support long lens's.

On a DSLR sized rig I have seen 60x zoom German You tube video that was completely stable, that is probably less likely on the smaller ones with less poles.

It is possible that the new oversized frame digital stabilization methods used by some of the newer cameras can actually be used to good benefit in this as well although they seem to do much better on pitch and yaw than on roll (for obvious reasons).

Best Regards,

Gary

Comment by Muhammad Al-Rawi on June 27, 2015 at 10:03am
Cheers Gary. I managed to snag one last night.
Comment by JB on June 28, 2015 at 8:33am

Thanks Gary for posting! I managed to get one as well. Always interested in a bargin! ;-)

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