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Old Jan 08, 2013, 02:30 AM
we dont NEED roads!
AcroFPV's Avatar
United States, CA, Rocklin
Joined Aug 2012
3,395 Posts
Build Log
Not a DIY Scratchbuild! But a build nonetheless.

So my DIY frames were too heavy. And I had initially set aside $60 for a gimbal, so when I found a FPV Spider frame with built in gimbal for $60, i couldn't say no. Plus a buddy of mine is flying this frame and after I saw it in the air I was sold!

Before I start with a horde of photo's, I would like to thank the following:
Witespy & his MultiWii 2.0 Pro w/GPS combo
ValueHobby.com for their quick shipping!
SimonK For his ESC firmware,
Double Sided Duct Tape,
RCGroups.com for not banning me, even though I got awfully close.
And last but not least... DJI for giving me the drive & determination to achieve RTH, Position Hold & more for less than I paid for my Transmitter

Specs
motors: Hextronic DT-750 from hobbyking (750kv)
esc's: 30amp RCTimer special's... flashed with SimonK firmware
props: 10x4.5 GemFan Nylon props
battery: 2650mah 4s 30-50c - 70c burst
flight controller: witespy's MWC 2.0 Pro & uBlox GPS combo
reciever: FrSky D8R-II+ with Voltage Sensor
transmitter: Turnigy 9X with ER9X firmware & FrSky DJT Telemetry Module & LCD screen.


So without further ado... let me introduce my newest build for FPV & aerial videography.



Lets open her up & see whats inside!


Freshly cooled solder & heat shrink!
Bottom Plate:


Top Plate & Arms:


As you can see there is barely enough room. With the frame assembled, everything finds its place and even though it looks like a mess... its a coordinated mess!




Gratuitous Close-Up shots:


DT750 at its finest



I have MegaPirateNG 2.8R3 installed on the flight controller. I enabled gimbal support and everything is testing 100% right now. I have some test video of the gimbal working. I might edit that later, but it is late and I am going to bed.

Tomorrow I will maiden this baby. Then the adventure in P I D tuning starts!
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Last edited by AcroFPV; Jan 14, 2013 at 12:57 PM.
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Old Jan 08, 2013, 02:52 AM
we dont NEED roads!
AcroFPV's Avatar
United States, CA, Rocklin
Joined Aug 2012
3,395 Posts
Ok I quickly threw together some gimbal test footage.

Tomorrow I hope to have some successful maiden footage!

MPNG Gimbal Test (1 min 29 sec)
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Old Jan 08, 2013, 03:09 AM
Manual will not flyaway :D
ecks's Avatar
Sweden, Gothenburg
Joined Oct 2012
3,000 Posts
I was wondering what all the fuss was about with gimbals for small quadcopters.

I'm impressed. I didn't realise you could self stabilise them.

Nice Subaru!
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Old Jan 08, 2013, 11:10 AM
we dont NEED roads!
AcroFPV's Avatar
United States, CA, Rocklin
Joined Aug 2012
3,395 Posts
Quote:
Originally Posted by Esevilaa View Post
I'm impressed. I didn't realise you could self stabilise them.
Yeah thats the entire point of a gimbal. To keep the camera level as the quad pivots.
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Old Jan 08, 2013, 02:30 PM
Manual will not flyaway :D
ecks's Avatar
Sweden, Gothenburg
Joined Oct 2012
3,000 Posts
Something else to add to my wishlist. I thought they were just for steering the camera.

Learning new stuff everyday
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Old Jan 08, 2013, 04:43 PM
Registered User
United States, KY, Bowling Green
Joined Aug 2012
129 Posts
I love that frame. Had it on my wishlist for a while. Cant wait to see the flight videos.
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Old Jan 08, 2013, 06:38 PM
Registered User
United States, CA, Marine Corps Base Camp Pendleton
Joined Jan 2013
518 Posts
niiiiiiiiiiice! what vtx/rx are you using and how much was that set up?
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Old Jan 08, 2013, 07:21 PM
we dont NEED roads!
AcroFPV's Avatar
United States, CA, Rocklin
Joined Aug 2012
3,395 Posts
The foxtech 5.8ghz 200mw vTX/vRX combo: http://www.foxtechfpv.com/foxtech-58...-mi-p-178.html

Got it used on the RCG classifieds here.
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Old Jan 08, 2013, 08:04 PM
we dont NEED roads!
AcroFPV's Avatar
United States, CA, Rocklin
Joined Aug 2012
3,395 Posts
Only took about 5 minutes to PID tune this baby. I love the 433mhz telemetry!

Here's some maiden flight footage. First battery after PID tune:

Maiden Flight of my new Spider Frame (2 min 42 sec)
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Old Jan 10, 2013, 10:14 AM
we dont NEED roads!
AcroFPV's Avatar
United States, CA, Rocklin
Joined Aug 2012
3,395 Posts
Took her to the park yesterday to stretch her legs a bit.

Still a little more tuning needed. Might need some expo on my transmitter too:

Park Flying (5 min 21 sec)
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Old Jan 10, 2013, 11:03 PM
rkk
Registered User
Joined Feb 2006
51 Posts
Is the camera gimbal working in the park flying video.

I was unaware of this frame. I'm intrigued. What motors, esc, and props are you running?
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Old Jan 10, 2013, 11:08 PM
we dont NEED roads!
AcroFPV's Avatar
United States, CA, Rocklin
Joined Aug 2012
3,395 Posts
No i got sick of the gimbals poor performance. There is too much weight riding on the roll servo, so the assembly tends to bounce around. Plus my servo's are cheap and i was getting fed up with them. The camera is hard-mounted... i'll have some pix of the changes I made soon.

Motors: DT750
ESCs: SimonK flashed 30amp
Props: 10x4.5

I am flying with both 4s & 3s batteries. I find the 3s batteries give me smoother video and the craft is alittle more "tame". With the 4s battery this thing is a monster.

I flew with 11" props today and i had a TON of vibration. So I am waiting to get my hands on a prop balancer. I am still trying to get the motors perfectly balanced too, but now I just found that my prop adapters are causing some vibrations.
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Old Jan 11, 2013, 06:36 AM
Registered User
Joined Dec 2011
249 Posts
My experience regarding vibrations is that smaller props and higher speed is always better. Much easier to get rid of vibrations with 9" props on 4S compared to 10" props on 3S.

Graupner 9" gives me absolutely no jello, but they're expensive and deadly. So for cheaper and softer props I have very good experience with GWS three blade 9x5x3. They need serious balancing, but when that's done they are very nice.

This is 880KV iPower Motors on 4S with GWS 9x5x3 and Sony RX100. No stabilisation in post, only in camera stabilisation:
Sony RX100 Quadcopter Test Flights (4 min 28 sec)
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Old Jan 11, 2013, 09:43 AM
Registered User
United States, KY, Bowling Green
Joined Aug 2012
129 Posts
Are you using value hobby prop adapters? I had a few that caused bad vibrations, and were much larger than they needed to be.
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Old Jan 11, 2013, 10:51 AM
Registered User
DeSoto MO
Joined May 2003
580 Posts
Quote:
Originally Posted by livinlife View Post
Are you using value hobby prop adapters? I had a few that caused bad vibrations, and were much larger than they needed to be.
The adapters are not that bad; however the prop nut they ship with is horrid. I think it mass is close to 7 grams and is always out of balance. Bin the prop nut and take the adapter to the hardware store. Grab some I think 5mm nuts. Half the mass and it fits close to the prop so you can hatchet the adapters shaft down.
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