Replies to This Discussion

Permalink Reply by Peter Chaffe on July 31, 2012 at 8:52am

Best way I found was in cli. 'erase', then 'reset' the eeprom back to factory default, which (should) remove all artifacts. Then do a full configuration...

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Permalink Reply by Don Fiedler on August 1, 2012 at 5:54am

Thanks, that worked, much better now......My loiter still is very wobbly, seems like it can't stay steady, stabilize is perfect......Don

Permalink Reply by palo sestak on July 30, 2012 at 8:51am

I'm back from field - tested a bit v2.7.

Saw here people having problems with motors. I must say have the same issue - motors speed oscillate (better vibrate) without my intervention.

Motors running is not smooth at all. Never had such observation with previous versions.

Next issue - I have tricopter so this is perhaps related only to this frame type:

when landed down and want to disarm motors tail servo traveled quickly to its limit position and stayed there (according to rudder stick position when disarming motors). Motors were disarmed, but the servo stayed in its limit position. Tail servo is on 7th channel so I wonder what would happen with octocopter when disarming motors...

Next issue:

in loiter mode tri is wobbling vertically a lot (+ - 2 meters). I know I don't have sonar but this wobbling I didn't notice with v2.6 and even earlier versions( I mean not that swift wobbling). On previous version wobbling was there (on v2.6 only minimal) but with 2.7 the wobbling was like jumping on the rubber strip (of course not that periodic).

General my feeling is not good and reverting back to 2.6.

I'm bit sad because I was soooo happy when 2.6 came and thought 2.7 will be at least that good for me as 2.6.

If somebody interested I have also log from the last flight.

Attachments:

• 2012-07-30 17-22 1.log, 421 KB

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Permalink Reply by palo sestak on July 30, 2012 at 8:58am

Here are params that I used with this flight

Attachments:

• 2.7tri.param, 4 KB

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Permalink Reply by Atus Fly on July 30, 2012 at 9:13am

Bonjour, je suis nouveau je m'apelle atus et merci d'avance

J'ai problemes en mettant la mise a jour version 2.4 vers 2.7 je n'arrive pas a prendre la main sur mon APM1

                          impossible de controle le setup pour par exemple controle les moteurs

                            il bip  , n'y controle les donnees avec ma DX8 pourtant je suis bien detecte

                         vous avez change une partie de la communication qui ne me permet plus de me servir

                            du programme HK LIVE en 3D pour controle mes mission

 

Hello, I'm new my name ATUS and thank you in advance
I have problems putting the update version 2.4 to 2.7 I can not take a hand on my apM1

                           impossible to control the setup for example control the motors

                             it beeps, no control of the data with my DX8 yet I am well detected

                          you change one part of the communication which no longer allows me to serve me

                             HK LIVE program in 3D to control my Mission

                         If the system is not compatible reconnaisant I would be able to have version 2.4 has new

                              in the update because I had my desaroi can not go backward

                                                               I am French and a bit lost please let me escuse

                                                                                                         Thank you in advance

                        Si le system n'est pas compatible je vous serais reconnaisant de pouvoir avoir la version 2.4 a nouveau

                             dans la mise a jour parce que a mon desaroi je ne peut plus revenir en arriere

                                                              je suis francais et un peut perdu veuillez m'en escuse

                                                                                                        Merci d'avance

 

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Permalink Reply by ronang44 on July 30, 2012 at 8:22pm

Hi guys,

I noticed something when I was tuning my quad for alt hold and loiter in ver. 2.7.

When I tuned the alt hold and alt throttle parameter away from the default settings, alt hold - 0.4 alt throttle - 0.31, alt hold is stable, but when I switched on Loiter the quad started to bounce. When I reverted to the default settings alt hold - 0.3. Alt throttle - 0.3 Loiter seems to hold altitude better. Is the altitude hold in Loiter now different? It used to be the same in previous versions.

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Permalink Reply by Manfred Dickgiesser on July 31, 2012 at 12:39am

The last weeks I was chasing vibrations on my T-Rex 450, new Bearings, new flybarles head....to get the vibration down as much as possible. But still there are some, (you can’t totally avoid vibration on a Heli) so I tried to isolate the vibrations to the APM2.5 with different padding’s, in the case, without the case, different locations, but with not much success. Still always less or worse attitude drifts (in some case unflyable, nearly lost the Heli twice)  . The only way to minimise this attitude drifts was through change of head-speed quite below my favourite 3100rpm to around 2700rpm.

It’s now flyable but still small drifts, which negatively influences all other flight modes. :-(

I think this is much more obvious on a flybarles T-Rex450 then on a quad, as one mentioned if you going from a quad to a T-Rex450 it’s like going from driving a bus to a super bike, the T-Rex450 is much more reactive.

 

I’m sure it’s about the relationship between sensor sample frequency and vibration frequency, aliasing.

Is there any way to increase the sample frequency?

 

Speaking of drifts, since I upgraded to ArduCopter 2.7  I noticed also a Compass drift. After replying the log of my 1. test flight, I realized the heli was pointing about 90degr. too much to the left.

I placed the heli on the table pointing SW. If I turn the heli by hand to the right to NW and back to SW, the compass ticks slowly past SW to almost S and then stops. If I do the same procedure the other way round,  SW to SE and back to SW, the compass drifts slowly past SW to W and then stops.

There are two different headings depending which direction I turned before stopping.

There was nothing obvious before the 2.7 upgrade.

Any suggestion please?

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DeveloperPermalink Reply by Marco Robustini on July 31, 2012 at 4:13am

Manfred please open a issue here for the compass problem, detailing the anomaly with logs, cool thanks.
Try to remove the autodeclination and the auto compass calibration.

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Permalink Reply by Project Nadar on July 31, 2012 at 5:45am

Marco,

 

I might be expiriencing the same issue with Manfred but i am not sure. While i have my APM2 on MAVlink sitting on the desk the Yaw value on the flight Data screen will gradually drop from heading 70 to 45 in the duration of 1 minute maybe a bit more. I didn't notice any problems in stabilise mode but it might be an issue in another mode maybe?

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Permalink Reply by Norman Sanchez on July 31, 2012 at 6:01am

@marco

hi all, I wanted to ask about the new parameter in the terminal setup, accel. What is in effect to set the arducopter this parameter?

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DeveloperPermalink Reply by Marco Robustini on July 31, 2012 at 9:27am

Sorry Norman but don't understand your question... :-)

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Permalink Reply by Norman Sanchez on July 31, 2012 at 11:12am

You sorry for my bad translations,

In terminal

setup:

help:

erase,

reset,

radio,

frame,

motors,

level,

(accel), how to set this parameter, and how it affects the performance of the quad.
Thank you.

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