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  • DarrellW: Woohoooo simplecopter mini T is on its way ::) ::) ::)
    July 27, 2016, 21:36:48
  • Hozza: About to build my first tricopter, a friend got me a quanum trifecta frame
    July 27, 2016, 13:16:10
  • DarrellW: Ordered the Mini T, you might have to let him know if shipping comes up at stupid price - he sorts it out for you ::)
    July 26, 2016, 17:52:40
  • DarkButterfly: I'm looking at the simple T copter, could be fun ::)
    July 26, 2016, 15:57:40
  • DarrellW: I think that when you've got a model that's almost indestructible and if you do manage to break anything it's simple and cheap to fix it makes you less worried about piling it in  :laugh:
    July 26, 2016, 12:58:13
  • LuMan: He's also got cajones del toro! How low were those flips and rolls he was doing?!!  :notworthy:
    July 26, 2016, 12:44:32
  • DarrellW: He was running a 4S2200, no need for stupid high C rating and more flight time!!!
    July 26, 2016, 12:41:50
  • LuMan: @DW - True. And the darn thing sounded scary as hell at full tilt!!
    July 26, 2016, 12:33:16
  • DarrellW: ANd much cheaper to fix if you pile them in  :rofl:
    July 26, 2016, 11:20:54
  • DarrellW: @Luman, makes your eyes water doesn't it??? I reckon that one of those would give most of the race quads a bl@@dy good run for their money  :laugh:
    July 26, 2016, 11:20:13
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    July 26, 2016, 10:47:18
  • DarrellW: $35 for the T and $30 for the Tri, he posts to the UK the most economical way he can find at the time  :evil
    July 26, 2016, 07:08:07
  • DarkButterfly: @DW, thats awesome ~~
    July 25, 2016, 22:42:06
  • DarrellW: @DB you should watch this - badass Simplecopter tri  [link]
    July 25, 2016, 21:46:01
  • DarrellW: Looks like another FC is going to be released soon - looks like a good one too! [link]
    July 25, 2016, 20:46:08
  • Bad Raven: Their real issue competition wise was the judging needing "control"..am they looked out of it ALL the time   ::)
    July 25, 2016, 07:04:20
  • Bad Raven: Yes, true, TBH their "weapon" wasn't up to much, but they were great value in the fun stakes
    July 25, 2016, 07:02:39
  • DarkButterfly: Nuts was awesome, the way it was rebuilt and put back into the arena ~~
    July 24, 2016, 22:14:47
  • DarkButterfly: Behemoth, terahertz and razer, will be good to see more former competitors of the original series
    July 24, 2016, 22:13:22
  • Bad Raven: According to trailer they are heavier and more powerful.........but yes, good they kept the basic set.
    July 24, 2016, 21:48:07
  • DarkButterfly: Also they kept the original house robots another plus
    July 24, 2016, 21:44:22
  • DarkButterfly: Ah okay, still sounded good though
    July 24, 2016, 21:41:05
  • Bad Raven: Jonathan Pearce
    July 24, 2016, 21:25:49
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    July 24, 2016, 21:02:36
  • Bad Raven: Bring back Craig Charles..........
    July 24, 2016, 20:59:25
  • DarkButterfly: I'm watching it, impressed so far ~~
    July 24, 2016, 20:38:57
  • Bad Raven: Robot Wars............
    July 24, 2016, 19:57:22
  • DarrellW: Watching St trinians on the box,  black and white too!!! Don't make them like that anymore, shame it would lighten up our lives ::)
    July 24, 2016, 18:17:01
  • Gandhi: Drop me a PM if you want....
    July 24, 2016, 10:17:23
  • Gandhi: @DB if you are after an rcexplorer tri, I'm selling my mini
    July 24, 2016, 10:17:14
  • DarkButterfly: i've bookmarked it, but may go after an RCExplorer tri
    July 23, 2016, 23:38:53
  • nub: i know on pre order :( think you'd be able to fit 1806's with 2 screws probably ::)
    July 23, 2016, 23:27:52
  • DarkButterfly: Can't push the button on it, out of stock
    July 23, 2016, 23:26:33
  • DarkButterfly: will the natal fpv3 work with 1806 motors?
    July 23, 2016, 23:24:39
  • DarkButterfly: ::)
    July 23, 2016, 23:23:34
  • nub: looks good still prefer the notalp fpv3 ::)
    July 23, 2016, 23:14:20
  • DarkButterfly: [link]
    July 23, 2016, 22:44:22
  • DarkButterfly: David has a little baby tricopter on his site for pre-order.
    July 23, 2016, 21:24:29
  • nub: either or will be a good choice, like the idea of the Armattan lifetime warranty
    July 23, 2016, 13:39:34
  • DarkButterfly: Sounds like a plan, I'll go with the mini tri and KK2 mounting kit
    July 23, 2016, 11:04:49
  • Hozza: DB I love Armattan frames, Chris the owner is very approachable and the warrenty is no BS either, ask Fletch  :laugh:
    July 23, 2016, 10:54:34
  • DarkButterfly: both the full sized and the mini tri
    July 23, 2016, 10:44:29
  • nub: the mini Tri?
    July 23, 2016, 01:16:43
  • DarkButterfly: so is an RCExlorer tri
    July 23, 2016, 00:00:31
  • nub: bit pricey
    July 22, 2016, 23:51:54
  • DarkButterfly: might push the button on this [link]
    July 22, 2016, 23:01:20
  • DarkButterfly: ::)
    July 22, 2016, 22:09:45
  • DarkButterfly: they are ball links, but they are useless when being flown hard, the flip wasn't even that stressful, it would have been if I did a hyper roll
    July 22, 2016, 22:09:34
  • DarrellW: @DG I have one thing to say...... ball links!!!
    July 22, 2016, 21:56:29
  • DarkButterfly: I'll be able to build a tricopter in my sleep lol
    July 22, 2016, 20:09:17

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Author Topic: How do you cover / tune your barometer?  (Read 8649 times)

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Offline teslahed

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How do you cover / tune your barometer?
« on: August 09, 2012, 15:07:29 »
I'm not getting as good performance from my barometer as i would like. I have covered it from prop wash by sticking a little square of double sided sticky foam tape on the chip itself but now I'm wondering if that's the best way to do it.

What do other people use and do you tune your altitude hold PIDs much or do you find the defaults work fine?

It's the MS5611 high precision barometer in the GY86 10DoF sensor board i have.


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Offline Gaza07

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Re: How do you cover / tune your barometer?
« Reply #1 on: August 09, 2012, 15:20:00 »
I normally squash a bit of open cell foam onto it, which is easy when you have a separate mcu and sensor board so it just get sandwiched between the 2, you not supposed to cover the holes with anything that can breathe, the altitude hold from the ms5611 should be a lot better than the bmp085 but the sonar is the most accurate but only at low altitude,
If this is multi wii I have in the past found the default values to be about as good as it gets but that was using a bmp085, I have never used a ms5611 with multi wii to date, If you are going to tweak things be carefull with the velocity setting as I altered it once and my copter shot of towards the moon very quickly, just make small adjustments each time and only alter one setting at a time, although default is probably going to end up the best setting  ::)

Offline Toledodave

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Re: How do you cover / tune your barometer?
« Reply #2 on: December 23, 2013, 21:53:48 »
I used the foam my motors came in seems perfect for this application.

Offline Biffa

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Re: How do you cover / tune your barometer?
« Reply #3 on: December 23, 2013, 22:23:11 »
I have a bunch of sanding blocks. Cut off the emery paper an underneath is an open cell foam. Certainly worked on my Crius build ~~
Steve

Offline nub

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Re: How do you cover / tune your barometer?
« Reply #4 on: December 23, 2013, 22:44:45 »
i used a bit of dark spongy foam with some insulating tape, it done the job quite well.

canny mind what PID settings i ended up with but do remember having to mess about with them quite a bit to get to hold its height in FF, that was with a BMP085.
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Re: How do you cover / tune your barometer?
« Reply #5 on: December 23, 2013, 23:04:03 »
Whatever you cover it with has to be able to breathe.  I use the foam packing that disk drives arrive in. It is dark grey, totally impervious to light and is open cell, that is it breathes. 

One of the neatest methods I saw was someone cut the top off a car tyre valve cap and glued it to the FC such that it encompassed the barometer chip, and then packed light-opaque open foam into the opening, making a completely light-tight and breathable enclosure for the Baro.

On my APM 2.5 I have a slab of that grey foam that runs along most of the length of the FC inside its 3DR case.
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Danny
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Current FCs: Pixhawk, APM 2.6, Naza M V2, Naze32, Flip32+ CC3D, KK2.1.5
Aircraft: miniMax Hex, DJI 550 (clone) TBS Disco, 450 Firefly, 250 Pro, ZMR250, Hubsan X4, Bixler 2

Offline GdLookinMingeR

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Re: How do you cover / tune your barometer?
« Reply #6 on: December 23, 2013, 23:39:58 »
I have some open cell black foam
if you would like some posted send me an addy
i will post you a 50x50 F.O.C.
Merry Chrimbo
Naza lite on Modified x525 frame, tarot 2d gimbal and some dodgy legs made from hk landing gear fpv
CPO135 Tricopter, Naze32 full, GPS, Cleanflight, Mobius, FPV
Tek Sumo, that i have never got off the ground
and Various other Fails...   :-)

Offline barneyg

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Re: How do you cover / tune your barometer?
« Reply #7 on: December 24, 2013, 07:36:03 »
After running some bench tests I've removed the foam from my ms5611 completely, I was just getting the PID's dialed in before the weather closed in here ... At least with multiwii the ms561q is affected by temp quite a lot and if you are also using a 3dr telemetry module or Bluetooth especially the serial IO causes ms5611 to warm significantly (on my crius it is quite close to the UART stuff) ... Over the course of about 15 minutes my quad can drop to -15m (while sitting on the bench) if I cover the chip ... And it settles on about -1m if I don't ... In actual flight the propwash has not been a problem, not sure about light effects - my fc is between the top and bottom plates of a 450 clone.