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This thread is privately moderated by timecop, who may elect to delete unwanted replies.
Sep 25, 2011, 04:40 AM
Gravity sucks :)
Is there any anti vibration material inside the cube?
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Sep 25, 2011, 04:43 AM
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No, it doesn't need to be. Everything is hard-bolted to the center cube (red in my drawing). The cube itself is suspended between some foam-like material inside the plastic casing. This is the correct way to do it. Sensors cannot move relative to themselves, and have some vibration dampening from the foam inside the outer case.
Sep 25, 2011, 04:46 AM
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topgearuk's Avatar
Sounds like your pretty happy with what you've found so far... Have you had a chance to fly with it yet?
Sep 25, 2011, 04:46 AM
Registered User
Thank you for the diagram TC,

one is supposed to be heading in my direction at some point I will take take pics of the cube and it's assembly when it does.
Sep 25, 2011, 04:48 AM
Registered User
topgearuk's Avatar
Quote:
Originally Posted by Joshbb
Thank you for the diagram TC,

one is supposed to be heading in my direction at some point I will take take pics of the cube and it's assembly when it does.
How did you manage to blag one of them?? Lol I'm jealous now! I'm so close to pushing the button on one of these!
Sep 25, 2011, 04:48 AM
Suspended Account
Quote:
Originally Posted by topgearuk
Sounds like your pretty happy with what you've found so far... Have you had a chance to fly with it yet?
No, I need to find a frame big enough to stick it on
I might reuse my MK-quad for this though. I'm not in too much of a hurry ~
Sep 25, 2011, 04:48 AM
Suspended Account
Quote:
Originally Posted by topgearuk
How did you manage to blag one of them?? Lol I'm jealous now! I'm so close to pushing the button on one of these!
Just do it, you won't regret it.
Sep 25, 2011, 02:02 PM
Registerer Used
milouze's Avatar
Quote:
Originally Posted by timecop
I'm not an artist.
Here's the IMU cube mspaint



Something like that.
Lol! Not bad for a scheme with a mouse and mspaint

Ok, so maybe DJi guys will someday implement PPM (hope so). What bugs me is the escs story; I mean, what is THE thing in the esc that would change everything? TC, what do you think about that?
And will you try your own ones on it?

Cheers, and again, great work
Sep 25, 2011, 04:14 PM
Tri-Quad-Hexa-Octo-copters!!
TC,
Yes it would be very interesting if it were only possible to be able to do a file compare with a few other GPS multicopter firmware's out here to see what is actually DJI "proprietary"...since the IMU components are the same as other known good working multicopter(s). Encryption is one way of hiding that fact.
So maybe $300 of PCBs, boxes, hardware and the rest for firmware and advertising and a few Mercedes... Looking forward to your flight testing too

BTW, check the voltage of the GPS backup battery to see if it is below 2v. That might be why some of the Gents were not getting quicker GPS lock on after a re-power. If so they just need to leave the units powered up for a few hours by at least a 12v 1A power source to charge it to 3v.
Cheers,
Jim
Quadrocopter and Tricopter Mega Link Index


Quote:
Originally Posted by timecop
...
My guesstimate on the Main Controller BOM is ~$20, GPS, ~$20, and $150 for IMU. Here you have it! The rest of the cost is in "proprietary INS/GPS algorithms" ^_^
Last edited by jesolins; Sep 25, 2011 at 06:37 PM.
Sep 26, 2011, 03:17 PM
Registered User
incorrect
Last edited by Joshbb; Sep 27, 2011 at 04:44 AM.
Sep 26, 2011, 06:31 PM
Suspended Account
Lea 6 is way bigger. I've got them.
Antenna is passive.
Sep 27, 2011, 03:56 AM
Registered User
Quote:
Originally Posted by timecop
Lea 6 is way bigger. I've got them.
Antenna is passive.
i was incrorrect
Last edited by Joshbb; Sep 27, 2011 at 04:45 AM.
Sep 27, 2011, 04:26 AM
Suspended Account
I dunno man, here's my LEA-6S module next to it for comparison.
I'm not aware of LEA-xx stuff coming in any other form factor.
Sep 27, 2011, 04:49 AM
Registered User
Quote:
Originally Posted by timecop
I dunno man, here's my LEA-6S module next to it for comparison.
I'm not aware of LEA-xx stuff coming in any other form factor.
thanks TC i was completely wrong, I think its a Neo 6 as already mentioned by Dan I think. and as you say its a passive ant the data sheet seems to match
Sep 29, 2011, 10:32 AM
Registered User
Musgravehill's Avatar
timecop good work!

What about IMU algorithm? DCM, Kalman? Quarternions/Euler angles?
Do it have horizon drift when copter makes turn (centrifugal force appears and effects on accelerometers)?
I cant see any advantages and features for this price..

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