[islandlabs] Flight control board

Jim Marinis jmarinis
Mon Apr 22 17:26:24 EDT 2013


I don't have the accelerometer, but I'll see what I can do to prepare 
before hand so we can make an attempt at autoleveling on Wednesday.  I 
have a feeling properly adjusting the esc's for a full control range 
will help that also.

- Jim


On 4/22/2013 2:21 PM, Burns, William wrote:
> FYI:
>
>
>
> I have 4-40 screws, and locknuts to go with them.
>
> I also have zip-ties that I think would fit through the mounting holes in a pinch.
>
>
>
> FYI: The "RC" battery has an "advertized" voltage of 11.1 volts.
>
> It charged to 12.6 the first time. (max LiPo cell voltage of 4.2V times three cells)
>
>
>
> After being used once it's only charging to about 11.5V
>
> Maybe this is normal after a single use.
>
> Maybe the battery was damaged by exceeding the max (80A) discharge current.
>
> Maybe the charger is working differently. (seems to spend more time "balancing")
>
>
>
> Jim:
>
>
>
> Do you have the accelerometer?
>
> Interfacing to the accelerometer is the other "big" thing.
>
>
>
> -Bill
>
> ________________________________
> From: list-bounces at freeculture.org [list-bounces at freeculture.org] on behalf of Jim Marinis [jmarinis at mjmonline.com]
> Sent: Saturday, April 20, 2013 12:47 PM
> To: list at freeculture.org
> Subject: Re: [islandlabs] Flight control board
>
> I picked up an additional ESC and motor from Microcenter so I can get some testing in before we meet again on Wednesday.
>
> After some experimenting, I can see how we managed to get the calibration of the first motor out of whack compared to the other three.  At the very least, I expect to have a method for easily programming all four motors to the same settings with a proper operational range for use with our current control setup.
>
> I see there's a method to reprogram the esc firmware.  That may be an option we can look to explore in the future also.
>
> - Jim
>
> On 4/19/2013 4:48 PM, Jim Marinis wrote:
> As we currently stand:
>
> - I've ordered the kk controller and an esc programming card.  I'm also looking into programming the esc's via arduino.
> - Once we get a full compliment of screws for mounting the motors, we can see if we need to reduce the vibration of the motors further.
> - Until the kk controller arrives (21-30 dayes, eh?) we can continue to investigate using individual gyro and accelerometer devices for leveling and such.
>
> Anything else that we should be looking into before Wednesday?
>
> - Jim
>
>
> On 4/19/2013 10:33 AM, John Abella wrote:
> If you're building a quad / hex / tri / etc...  the KK board is good.
>
> The 'auto level' isn't as good as my NAZA flight controller....but it cost $200 less.  It definitely works though.
>
> I can share my parts list for my clone quad / fake DJI F450 build if anyone wants it.
>
>
> John
>
>
>
>
>
> On Fri, Apr 19, 2013 at 10:23 AM, Burns, William <burns at cshl.edu<mailto:burns at cshl.edu>> wrote:
> These guys have some ESC calibration info, and a design thats remarkably similar to our own.
>
> http://awesomecopter.nl/
>
>
>
> Here's some better calibration info:
>
> http://robots.dacloughb.com/project-2/esc-calibration-programming/
>
>
>
>
>
> Here's an interesting site that makes it seem like the parts we're getting locally are reasonably priced.
>
> http://www.aeroquadstore.com/
>
>
>
> note: we are using 10-amp "outrunner 1000Kv" motors:
>
> http://www.parallax.com/Store/Accessories/MotorServos/tabid/163/CategoryID/57/List/0/SortField/0/Level/a/ProductID/814/Default.aspx
>
>
>
> with 30-amp "GemFan" ESCs.
>
> http://www.parallax.com/Store/Robots/AllRobots/tabid/755/CategoryID/57/List/0/SortField/0/Level/a/ProductID/857/Default.aspx
>
>
>
> which can be programmed with a Turnigy ESC programmer:
>
> http://www.parallax.com/Store/Robots/AllRobots/tabid/755/CategoryID/57/List/0/SortField/0/Level/a/ProductID/816/Default.aspx
>
>
>
>
>
> 'till I saw that "kk" board I thought these were "the" two choices for IMUs:
>
> MPU6050 https://www.sparkfun.com/products/11028 ($40)
>
> ArduIMU+ V3 https://www.sparkfun.com/products/11055 ($80)
>
>
>
> The "kk" is more than an IMU. It's a complete solution for $30.
>
> This may "deny" us the opportunity to program it from scratch or to add drone features if they're not already there.
>
>
>
> note: the ArduIMU+ takes GPS input which is interesting but it's not clear to me that the GPS unit *should* connect to the IMU.
>
>
>
> If what we want is a "fleet" of RC-only quadcopters, the "kk" is clearly the low-cost option.
>
>
>
> The arduino may give us a better learning platform and stepping stone to things like: automatic "return to launch site", transition to lifting-body flight, etc.
>
>
>
> It wouldn't hurt to try stuff w/ the "kk" in parallel w/ the existing arduino based solution.
>
>
>
> -Bill
>
>
>
> ________________________________
> From: list-bounces at freeculture.org<mailto:list-bounces at freeculture.org> [list-bounces at freeculture.org<mailto:list-bounces at freeculture.org>] on behalf of John Abella [john at abella.net<mailto:john at abella.net>]
> Sent: Thursday, April 18, 2013 7:29 PM
> To: Island Labs main mailing list
> Subject: Re: [islandlabs] Flight control board
>
> We used that exact board just recently on our clonequad build:
>
> http://www.flickr.com/photos/jabella/8533408964/in/photostream
>
> You'll need the AVR cable to re-flash the firmware (and the stuff that ships on it is OLD) but it works well.   Not like a $200 flight controller, but not bad either.  Not sure what you guys intend to use it for...
>
> Also a note for anyone not familiar with Hobbyking - if it's not in the US warehouse you should expect it to take 21-30 days for delivery.
>
> JohnA.
>
>
>
>
> On Thu, Apr 18, 2013 at 12:45 PM, Jim Marinis <jmarinis at mjmonline.com<mailto:jmarinis at mjmonline.com><mailto:jmarinis at mjmonline.com<mailto:jmarinis at mjmonline.com>>> wrote:
> After the information Bill came across last night regarding gyros and accelerometers, perhaps the answer is this board with both:
>
> http://www.hobbyking.com/hobbyking/store/uh_viewitem.asp?idproduct=24723&aff=588847
>
> Thoughts?
>
> - Jim
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