[QC102]

I am using LP 16.09 RC1 ( corrected)
I cannot get to arm the motors as set up in Revolution.
The TX and RX are “bound” – no issues there.
I have a revolution connected to a NEO-M8N GPS.  The whole setup looks OK and having it all warmed up and battery connected, I disconnect the USB, put the props on, - out in the back garden – yaw right to arm it. Nothing.
Back inside, connect everything up – check…seems OK but check each page and save each before moving on. All green - where needed -  on the firmware/flight data pages. Arm = Yaw Right. Nothing.
Repeat para one – nothing again.  BUT with the USB connected I can – it seems – arm the motors..but not by the Yaw Right setting.
Repeat all this about 4/5 times a day since last Thursday– but today when arming  fails- I  go through a  try all combinations – with props off –  finally today,  used my Phantom arming – both sticks down  and it arms the motors. Yaw left to un-harm fails – but both stick down and outwards – works. 
I have also – three times wiped the board and used the vehicle setup and go through each section – makes no difference – still will not arm  other than as described above.

[crof2003]

So will it always arm now with "both sticks down", or only sometimes?

Sent from my VS986 using Tapatalk

[QC102]

It is hit and miss!  There is no clues to what it is causing this. Revolution settings page  by page show all is OK.
FM No1 is default, No 2 is GPAssist  with thrust at Altitude Hold... but I never get as far as even thinking about changing FM.
I have testing  while  connected by USB - no props and try to arm motors at Yaw Right nothing.  Thinking sticks have reversed or channels changed I try a lot of different  stick moves... which how I found sometimes - both sticks down and in - which I think on many radio's is more or less -default.
I have armed while connected to computer... unplugged USB, put  props on - go outside...no longer armed. Arm again  when connected - disconnect - not armed.
I have ordered another revolution which  should be here in a few days.... when it does I will change FC and see if behaves "normally".
Just had another 2 hours changing things...upgrade and erase - start Vehicle wizard and  set it  up from scratch - still the same!

[Mateusz]

• If you reconfigure your flight-controller always check if Arming sequence is set to yaw left. If you do calibration step it's reset to default "unarmed" from what I remember.
• Check that your radio transmitter is calibrated correctly, check if sticks move the same way as in transmitter wizard. Be sure you have all defaults on your transmitter, not trims or strange mixing of channels.
• Check in GCS that you are receiving correct values in Input panel when you move your sticks (battery on, props off) then sliders should move with some delay (due to telemetry processing) but accordingly.
• If you attempt to fly with EKF, be sure GPS was for longer exposed to clear sky (~20min) before first flight within 6h window and that you unplug/plug again battery after that, since EKF tends to diverge if copter is stationary for too long.
• Did you calibrated your magnetometer ourdoors ? Did you try arming it in different location ?

Other than that, I would ask board seller.

[QC102]

I have done most of what you suggest ...what I missed ..I will try over the next few days. I have a second Revolution, so I will install onto to a frame, set up and see how it reacts.
What I find is, pull the sticks down and inwards...hold them...no motors..release them...and the motors spin.
I do more reading on the revo threads and set up the other revo. 
Will get back with results.

I doubt BangGood would be kind enough to replace it...but if it does not work out, I may just get back to them.

[Mateusz]

Will get back with results.

Additionally I suggest trying with Complementary (Basic) first. Try with the most basic setup to be sure it works, then add complexity such as GPS with INS13.

LP 16.09 RC1 should work (it does for me), be sure to check that your transmitter is sending the right values on the right channels, from what I assume you already checked that ? What was the results ? Are sticks moving correctly in transmitter wizard ?

• Rule out transmitter receiver path
  You need to check your transmitter and receiver, maybe by connecting simple servo motor to receiver if you have one around trying if it moves with different channels. You should also observe that in GCS revo on the sliders, that they move accordingly and transmitter wizard.
  What is your receiver ? What protocol ? Does it work with different receiver ? I am using X4R-SB with Sbus protocol.
  
• Rule out power issues
  Disconnect everything except for Revo and receiver. If you have too much of other gear maybe your regulator does not provide enough current for whole system ?
  
• Rule out configuration issue
  Upgrade&erase to remove all config stored also in external flash memory and start from scratch. In transmitter wizard, are all sticks moving correctly at the end of calibration ?
  

About

I doubt BangGood would be kind enough to replace it...but if it does not work out, I may just get back to them.

They have quite good return policy, 30 days from shipment date (and 3 days if receiving date is confirmed DHL etc..) but usually its 30 days for Dead on Arrival Items can get new item. And as much as 90 days for Defective Item you have to return to get refund or new item. For 90-180 days they cover 35% of your shipping costs and sending back to factory. Only after 180 days they do nothing for you But in all cases you need to proof this, as some people simply cheat them. Check here https://www.banggood.com/help-search-k-?search=return

I have very good experience with them, although only once needed to ask for refund was just ESC so they send me another one and I didn't need to send anything back. I guess one ESC was also not worth hassle for them.

[QC102]

To  conclude this thread.

I did a upgrade and erase to wipe the  board. 

I then  run  the setup Vehicle process from the welcome page- keeping my setting rather than a template - through to the TX setup.

Before setting the NEO M8N - I  took the quad out into teh garden and tested it.... its flies OK, hovered pretty good with  some drifting - but it was a breezy day.
In a bigger area  to run it out I think  it would be OK - and classed as stable.

I took it back inside and stripped the FC out of the frame to cool it  off in the freezer.

I then run  the full calibration set up and included and running the Thermal calibration.  Installed back in the frame.

I then  sorted out the Settings and Mags sections - and I had been  opting for "Both " although the  Auxmag was tagged as not found - (still is not found no matter what I do...is there a solution?) 

The GPS module sits at the back of the top deck as far back as the twisted cables allow.  On the underside of the  deck I have folded some ali  tinfoil nicked  from my wife's kitchen supplies and taped it under the GPS module.  Although today I found a part on eBay in which  to insert the GPS module and it sits inside a "dish" on a short leg - I may look at this later.
After all this  I waited and watched the firmware until all relevant boxes were green.
 
The motors arm  on request with the correct moves as set up in the TX setup section.

I  just need to set up the  flight modes and TX switches to  do a full check at the weekend.   Not sure what to expect though!

[f5soh]

I then  sorted out the Settings and Mags sections - and I had been  opting for "Both " although the  Auxmag was tagged as not found - (still is not found no matter what I do...is there a solution?)

What type of auxMag do you use ?
Is the AuxMag correctly wired and configured ?

[TheOtherCliff]

Revo won't arm if there are GPS flight modes, but you are using Basic Attitude Estimation algorithm.  Use INS13 in Attitude -> Settings -> AttitudeEstimationAlgorithm

To get it to arm when using GPS, you also must have Home Location set.  You must also have green health for GPS and mag.

That is just arming.  You must also have good wiring for it to fly without making large magnetic fields that mess up compass and make it fly away.