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Building Copters with Round Tubes - Stronger, Lighter, Easier to Mount Motors than Square Tubes

Started by Forrest Frantz. Last reply by Hugues yesterday. 488 Replies

Round tubes offer the following pros:handle twist better than square tubes.  Thus for the strength, are far lighter.are more readily available (pipes, tubes, arrows, kite frames, golf clubs and…Continue

Compass interferences

Started by Cala. Last reply by mP1 yesterday. 38 Replies

I have an APM2.5 with internal compass, my compass motor interference is a little high 30-40% I calibrate compass, etc. but always the copter turns 20-30 degrees rigth when I take off and stays…Continue

Strange behavior

Started by Anton Khrapov. Last reply by Anton Khrapov on Tuesday. 5 Replies

Hi,I have just finished re-building my hexa and on the first flight noticed a very strange behavior (which caused a big crash already).First, yaw drifts. It happens all the time, and in different…Continue

Autotune "ERR: Autotune-2" Bad gains

Started by Sascha M.. Last reply by Sascha M. on Monday. 4 Replies

Hi everyone.I have 2 copters, a small hex and a big quad. Both are running 3.2.1.The small hex starts autotune instantly, despite having pretty bad vibrations, no issues there, and this tells me I am…Continue

Tags: Autotune

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Comment by Andrew Gaiennie on June 27, 2014 at 7:47am
Single sheet will block almost all signals, it will also redirect signals so you can wrap a sheet around 1/2 of your wireless router toward your workstation to boost the signal.
Comment by Andrew Gaiennie on June 27, 2014 at 7:46am
Aluminum foil.
Comment by Pedro H on June 27, 2014 at 7:43am

Hi folks,

I finally got to SaveTrim my Hquad yesterday and was a success.

Then I checked for interference using Mission Planner "compassmot"
The results:

-at 10% throttle: 57% of mag field
-at 50% throttle : 151% of mag field
-at 80% throttle: 229% of mag field
:eek:

What materials is best to shield my APM2.5? Foam? Plastic? Wood?

I plan to re-wire my red & black esc wires.  And plan to move APM higher on the frame.

Comment by Jordan Brown on May 26, 2014 at 11:56pm
People, new questions and topics should be posted as a new discussion above, the comments section down here makes it very hard to keep separate topics going at once.
Comment by Sean Headrick on May 26, 2014 at 10:16pm

I typically rely on a battery low voltage indicator which alarms at around 10%. That is where i have considered low voltage for landing. At any rate i don't typically use the low voltage fail safe. Maybe a problem long since solved but it used to not work so well and would trigger if I looked at it funny. For mapping these various fields I have been trying to optimize for a return at around 10%-15% remaining. 

  BTW we figured out the GPX.log file for overwriting the GPS info to the exif data.

Comment by UAVStuff on May 26, 2014 at 8:46pm
@Rob J I don't agree- 40%-50% seems way high for a fail safe initiation. In my experience my voltages don't start getting low enough to bat an eye at until 20% at most.
Comment by Rob J on May 26, 2014 at 8:41pm

40% should have caused a land action to occur...check your parameters and see if you don't have a land command to execute at low battery failsafe.  40% should activate failsafe.  You can't take a battery to zero.  Most people won't fly past 50%

Comment by Sean Headrick on May 26, 2014 at 3:22pm

so we were running some flights over some farmland the other day and a couple things came up..

  • The flight plan was executing smoothly when about halfway between two waypoints the aircraft started to descend at an alarming rate. Battery power was at 40%. Have begun looking through the .log files , but am still a bit new at analyzing the log files.could help me see what caused the unexpected loss of Alt. I think it may have been a WP ALt command but all my waypoints were at 45 meters.
  • Was also trying to figure out how to inject GPS camera locations where the relay was triggering the camera using the relay command from the RC9 pin. The " Goetagging Photographs" wiki page suggests only the tlogs can be used, Do these locations record anywhere else?

Thanks for your help

2014-05-24%2011-17-40.log

Comment by Steve Cain on May 23, 2014 at 5:38pm

BustamyTool... the pins do not need to be in place.

There are two flavors of power modules... the kind that provides 5v to the APM along with the voltage and current readings... and the kind of power module that only reads the voltage and current but does not have a BEC and therefore does not send 5v to the APM.  It sounds like you have the kind that only reads voltage and current but does not have the BEC in it.

Comment by BustamyTool on May 23, 2014 at 3:45pm
Im trying to build a Y6 and im on my 3rd apm board. I wont go into detail but here's my prob. The board powers up when connected thru the usb but I just tried useing the power module to power up and it does nothing. My question is do the header pins for the jp1 jumper need to be soldered in place? I dont mean the jumper itself just the header pins the jumper connects to.
 
 
 

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