I crashed my plane because of rvosd!

[kaloula]

hi,
3 weeks ago, I did my first FPV flying with OSD. everything seemed to work fine for a first flight: rvosd detected correctly the rc sgnal lost, servos direction for AP was correctly setup,etc... So when I launched te EZstar in the air after that gps were locked on sats (7 this day), all work fine, until at 100 meters at horizontal and 50 meters altitude to home, the screen indicated a very fast "rc signal lost", and just few seconds after, "rc signal lost "reappeared becoming solid: the osd take control of the plane, and as the AP wasn't perfectly setup, it went in a "down spirale" like you say on the web page. You guess wath appened after: a hard crash who destroyed totally the plane, the aux batt burned and a servos broke. by chance, all electronic is working: Tx, osd, Rx, camera. I wonder why the osd indicated very fasst that rc signal was lost without a realy loss of signal. (I was at only 100 meters from home, and the range of my RC Rx is more than fpv videos with my bad Rx antenna 900 MHZ). I'm waiting for your reply.

[Alex Villa]

hi,
3 weeks ago, I did my first FPV flying with OSD. everything seemed to work fine for a first flight: rvosd detected correctly the rc sgnal lost, servos direction for AP was correctly setup,etc... So when I launched te EZstar in the air after that gps were locked on sats (7 this day), all work fine, until at 100 meters at horizontal and 50 meters altitude to home, the screen indicated a very fast "rc signal lost", and just few seconds after, "rc signal lost "reappeared becoming solid: the osd take control of the plane, and as the AP wasn't perfectly setup, it went in a "down spirale" like you say on the web page. You guess wath appened after: a hard crash who destroyed totally the plane, the aux batt burned and a servos broke. by chance, all electronic is working: Tx, osd, Rx, camera. I wonder why the osd indicated very fasst that rc signal was lost without a realy loss of signal. (I was at only 100 meters from home, and the range of my RC Rx is more than fpv videos with my bad Rx antenna 900 MHZ). I'm waiting for your reply.
Ok RVOSD has only two ways to go in to RC link lost mode. If you have the "receiver mode" set to PPM it will look for incoming servo pulses on auxiliary channel, if the pulses are not within the standards (and this can only happens if the receiver lost the signal from the transmitter), it will display the rc link lost advice (failsafe or autopilot). If the "receiver mode" its set to PCM it will do the same check than PPM mode plus it will check if the throttle channel goes over the "Set pcm FS point" menu adjust, usually the PCM receivers keep sending the last valid pulses or the failsafes to the servos when they lost the signal from the transmitter. Note that in PCM mode if you configure the "Set pcm FS point" within your normal throttle stick range, you can go in to rc link lost when the throttle stick goes over the "Set pcm FS point". This is why you should read the instructions and check that this is working properly before going to fly.
Now the other chance for the rc link lost to be detected is that your receiver really lost the RC link due to exessive distance or interferences, and this is why you should always do range checks before flying, and this should be done every time you go flying with or without RVOSD installed.

[kaloula]

hello alex, thanks for your reply,
I was using a PCM receiver (futaba), and rvosd was set in pcm mode. I tested the dectection of signal lost at home several time, and rvosd didn't detect signal lost at full throtle.( pcm fs point is just over this value). When I switched off the rc Tx, loss of signal was detected about 5 seconds after, and still 7 second for exit AP mode after rc TX is switch on, so why does the osd indicated a very fast "rc signal lost"?? . For the RC Rx range, it's normally 900 meters, maybe less with the 900-500 Tx, but not only 100 metrers! And video range is less than my futaba receiver (tested at home) and I had good video signal when osd enter in AP mode; So I don't think the signal was really lost on the receiver.

[AndreK]

When I switched off the rc Tx, loss of signal was detected about 5 seconds after, and still 7 second for exit AP mode after rc TX is switch on, so why does the osd indicated a very fast "rc signal lost"?? .

You need to know that some receivers "holds" the last output for 1-2 seconds before going to failsafe positions - as a method to "hide" some lost packets.
Also, some systems are very slow to re-negotiate link, you may turn on the RC-TX and the servos move like 4 seconds after that.

However, I doubt it's RVOSD's fault, RVOSD is not slow to enter/exit autopilot, I programmed a switch on my RC-TX to force "link lost" - and I can switch very fast to/from autopilot, it surely does not take at much as 1sec.

[kaloula]

ok so if the plane crashed, it was because of my receiver and not the rvosd? strange but possible. so what can I do? I continue to use this receiver? Is it possible to make the osd compatible with pcm futaba receiver with uprade?

[Alex Villa]

ok so if the plane crashed, it was because of my receiver and not the rvosd? strange but possible. so what can I do? I continue to use this receiver? Is it possible to make the osd compatible with pcm futaba receiver with uprade?
Yes, after the first patch you can use futaba PCM receivers, another thing that can cause this problem is a lose conection between the receiver and the OSD throttle or auxiliary channels. Also a BEC failure. I would not go to fly again without doing extenssive tests on ground.

[kaloula]

mmm... lets see: my osd is flashed to V1.13 who is compatible with futaba Rx;so I don't think this is the cause of the crash. The osd was very good ptrotected in the elapor foam of the easystar, so there is no wrong contacts. BEC failure? I have a 3A bec who powered no more than 3 servos and Rx with a 3s lipo so its also quite unprobable...

[Alex Villa]

mmm... lets see: my osd is flashed to V1.13 who is compatible with futaba Rx;so I don't think this is the cause of the crash. The osd was very good ptrotected in the elapor foam of the easystar, so there is no wrong contacts. BEC failure? I have a 3A bec who powered no more than 3 servos and Rx with a 3s lipo so its also quite unprobable...
I am trying to point you to the possible causes of this, but nothing I can do from here. Maybe If you post pictures of your setups and a video from the crash I can help more. You can look at the begining of the instructions thread (http://www.rangevideo.com/forum/showpost.php?p=758&postcount=1) I added some information about interference issues.

[kaloula]

Sorry, I haven't any video, but only pictures of the plane after the crash.

[Alex Villa]

You need to know that some receivers "holds" the last output for 1-2 seconds before going to failsafe positions - as a method to "hide" some lost packets.
Also, some systems are very slow to re-negotiate link, you may turn on the RC-TX and the servos move like 4 seconds after that.

However, I doubt it's RVOSD's fault, RVOSD is not slow to enter/exit autopilot, I programmed a switch on my RC-TX to force "link lost" - and I can switch very fast to/from autopilot, it surely does not take at much as 1sec.
RVOSD has a timer to do all the tasks on 0.005 Seconds this is 200 times/second. This is even faster than servo refresh, and 0.005S is the maximum lag the system will add to failsafe switching. Of course your Tx-Rx system takes much more time to do so.

[kaloula]

OK I just tested my Rx: It put itself in fs mode just 0,5 seconds after Tx is switch off, and 5 seconds after tx is swith on to bind with Tx. So it cannot justify the very fast "rc link lost" display on the screen.

[Alex Villa]

OK I just tested my Rx: It put itself in fs mode just 0,5 seconds after Tx is switch off, and 5 seconds after tx is swith on to bind with Tx. So it cannot justify the very fast "rc link lost" display on the screen.
Did a range check? when you are nearby, the RC link is solid, so what you are seeing here just the time it takes for the Transmitter to start transmission and//or the receiver to start outputing pulses after cycling power. Check whats happening when the RC link really fail, aka range test.

[kaloula]

No, not yet. But I tested also the detecting of loss of signal with the osd, Rx close to Tx, and it's slower than just Rx. But the probleme is that my osd has been faster than my Rx to detect an rc signal lost, this is not normal!

[Alex Villa]

No, not yet. But I tested also the detecting of loss of signal with the osd, Rx close to Tx, and it's slower than just Rx. But the probleme is that my osd has been faster than my Rx to detect an rc signal lost, this is not normal!
The OSD display Rc link lost when certain conditions are meet.

The conditions needed for the OSD detects the RC link lost are this (http://www.rangevideo.com/forum/showpost.php?p=1238&postcount=2)

I didnt tested all the receivers out there, so you have to check which of those conditions made the OSD to go in to RC link lost. I tried to point you to all posibilities, but cant check by myself.

Has you being able to reproduce this problem hapening again? I think this is the first step. Obviously that fast Rc link lost wasent caused by you turning off your transmitter. Read my previous post

[kaloula]

I did a range test today;results:andreK was right: the receiver can loose and bind with the Tx signal very fasst. I think It's why the rvosd diplayed very fasst "rc link lost" before the crash. But I found an other strange thing: when rc link is lost, the rudder servo doesn't respond to AP, and goes crazy: It doesn't correct direction. An other thing: was does the rc link was lost at just 100 meters, whereas I went up to 200 metrers during my range test before return to home, and with good reception?

[Alex Villa]

I did a range test today;results:andreK was right: the receiver can loose and bind with the Tx signal very fasst. I think It's why the rvosd diplayed very fasst "rc link lost" before the crash. But I found an other strange thing: when rc link is lost, the rudder servo doesn't respond to AP, and goes crazy: It doesn't correct direction. An other thing: was does the rc link was lost at just 100 meters, whereas I went up to 200 metrers during my range test before return to home, and with good reception?
Do you have RVOSD set to PCM or PPM? The rudder responds to AP if the autopilot its set to ON, and the rudder movement depends of the heading indications. The GPS needs the plane to be moving with some speed in order to do a accurate calculations of heading, If you are not moving the GPS indication of heading start to jump, so the rudder movement will jump also.
This is not the first time I make a suggestion to you about reading this: http://en.wikipedia.org/wiki/Global_Positioning_System also you need to take your time to understand how the RVOSD autopilot works.

Make sure your BEC//ESC is not shutting down.

http://www.rcgroups.com/forums/showthread.php?t=1045264 Are you this guy?

[kaloula]

No, I'm not this guy, sorry. I don't read the wiki article because I don't see the utility of that. And I know that it must speed to make the heading indicator is reliable: anyway, I was walking when AP was engaged, and heading indicaror was working fine (its indicated correctly home, at walk speed), but servo doesn't respond to this changing( I set the rvosd on sats before walk away to test the range). And of course the osd is set to pcm, PCM fs point is correcly adjusted, AP is on, with rudder and elevator on. All is exactly like the first flight: all is adjust, exept AP . And don't worry, I good understand how the AP works. I made a video of my range test. I will upoad this video as soon as possible to make more comprehensive this trouble for you.

[kaloula]

mmm... just read your link to rcgroups: the crash is like mine, and with exactly the same receiver! But I think it's quite silly to fly his plane without set the osd on sats before, but why not... I also read that the crash is probably due to a bec failure( it's true that fasst futaba receiver have hard consumption). so it's perhaps the real cause of my crash and his crash. So I will test tomorrow the bec of my esc (mine is a 2A).

[kaloula]

ok I bought an easyglider, in replacement of my poor easystar.I use now a receiver battery instead of the bec I was using before the crash, ans I bought a CPD4 FMA copilot xy. So I start again to equipe my new airplane, and I made today the AP test in the ground to know the elevator and rudder servo direction. And bad surprise: the first time, the elevator servo broke , and the second, the rudder servo also broke . What happened?
and I have few question relative to copilot using:
-I see that rvosd always test the servo signal, who makes the servos moves a little. So the signal isn't exactly at 1,5ms, and evan if the aileron and elevator failsafe are set to 1,5ms, can the copilot leveled the plane (because it works only if servo are in neutral)
-are the servo movement relative to the heading changing the same between Ap test in the ground and AP on if both are setup the same?

ps: my rvosd is only the 1.1 software, so the comilot is indenpendant of the rvosd.

[Alex Villa]

There is several improvments on FW ver 1.11. One of those was protection to avoid wild servo outputs when the OSD doesnt detect radio signal at startup, but still if you select PCM mode there can be problems with unproperly configured inputs. Basically my sugestion is to configure RVOSD for PPM receiver and start the Rx configuration procedure. Read here to make sure everything its ok. http://rangevideo.com/forum/showthread.php?t=153

I have almost finished the version 3.0, for OSDs gen1/gen2/gen3. There is several updates on this new version, and it will be easier to configure. If you can wait I strongly suggest to do it. MEanwhile I would love to see pictures of your setup, so maybe I can help better.

[kaloula]

hello alex,
My Rx is configure on the rvosd for ages now. I haven't changed the configuration since the first (and last!) flight on board of the easystar: the rc link is detected when i switch off the rc Tx, and the servos replies correctly to orders. (I'm in pcm mode with R617 futaba receiver) . And the servos did'nt broke when they went to outputs, they broke to neutral positon: the first servo was quacking very fast, and for the second, it's like it was blocked by something.
I could also change my rvosd for the newest Gen 3, but it's so closed into the fuselage, I can't remove it without cut the fuselage.

[studiopetros]

Are you use the old servos from the crashed plane?
Upload some fotos will help.

[kaloula]

No, they are both new. How can I do to upload fotos on this forum? I tried by clicking on "insert image", but it must an url link, so I can't upload some picture directly from my hard drive?!

[martinv]

No, they are both new. How can I do to upload fotos on this forum? I tried by clicking on "insert image", but it must an url link, so I can't upload some picture directly from my hard drive?!

One way is to use www.photobucket.com (or other similar free service). You upload there, then you simply paste some text they generate for you in your post. The nice thing is you can post the same picture many places without re uploading it by just pasting the text again.

Here is an example of the text (I removed the first "[" befire "IMG" so the text would show and not the pic): IMG]http://i222.photobucket.com/albums/dd284/martinvigesaa/Airplanes/patchantennaandrxsetuplr.jpg[/IMG]

and it looks like this:
http://i222.photobucket.com/albums/dd284/martinvigesaa/Airplanes/patchantennaandrxsetuplr.jpg

[studiopetros]

No, they are both new. How can I do to upload fotos on this forum? I tried by clicking on "insert image", but it must an url link, so I can't upload some picture directly from my hard drive?!

Another way is to click "Go Advanced" and than "attachments"
The fotos must be small size.

Have you try another reciver. I reccomend the Futaba R149DP.:)

[dessine moi un avion]

Protect your receiver with the aluminum strip adesi is very effective against parasites radiation, I have brought for me my radio is good and I have no brief passage fail saif.

[kaloula]

183

184

185

186
thanks studiopetros!

pour "dessine moi un avion": cool un français! je connais très bien cette petite astuce qui consiste à protéger son récepteur des perturbation électromagnétiques. Mais le mien est un pcm, et qui plus est, utilise la tehnologie du 2,4ghz, extrêmement résistante aux tops radios. De plus, le mien est situé loin du controlleur, et l'émetteur en 900 MHZ ne perturbe en rien, j'ai testé la portée avec et sans, et c'est la même chose. Et ceci n'explique que les servos ai cassés ainsi.

[kaloula]

So alex, have find a solution of this trouble? I receive two new sevos in replacement of the olds, but now I'm affraid to plug them. How a simple signal can damage servos?

[Alex Villa]

So alex, have find a solution of this trouble? I receive two new sevos in replacement of the olds, but now I'm affraid to plug them. How a simple signal can damage servos?
Actually the pictures I needed was detailed description of system conections.
If everything its properly conected, I would sugest set the menu "receiver mode", back to PPM, and make sure you turn ON your transmitter before or together with RVOSD. Never after. Then do the receiver configuration procedure.

I think the problem here is due to RVOSD detecting lost of signal, or no signal at startup. and going to failsafe with unproperly set failsafes.

[elpimous]

Salut les gars, et hello for others !!!!........................

J'ai une question de la mort :

J'utilise un 8 dbi patch pour le 1.2 Ghz, donc directionnel..........:rolleyes:

Je cherche a voler au dessus des nuages, donc plus de visu au sol, ok ?!

A 1000 M d'alt, si je passe derriere le patch, a pu d'image !!

Donc, Et si je mettais le patch à l'horizontal, dirigé vers le haut, et que je plaçais l'antenne du TX (avion) a l'horizontal aussi, en volant, je pourrais théoriquement voler sur un rayon d'au moins 1000 m, avec comme point central, moi !..............J'ai faux, ou pas ???!!!:D

Ca me permettrais de voler avec le nouvel ecran radar RVOSD, avec constamment mon repere, mais ca me donnerai aussi des perturbations au sol, normal !

Dites moi ce que vous en pensez, les gars !!!

Sinon, mon super dimona fpv déchire et prend 10 M/S avec l'axi 2826/12...A moi les nuages.............Bah oui, il faut bien un but, dans la vie !

Ah, oui,...........Je viens juste d'avoir mon Magnifique Speed Triple 1050 Blanc full options........Elle est Bellllllllllllllllleeeeeeee !!!!...Ca fait quoi, là, ça ???

Sinon, sérieusement, j'attends le nouveau firmware pour compléter et finaliser le french manual !!!!!! Et en PDF, pret a imprimer avec des Tofs !!!

@+ les gars,
Vince.

[kaloula]

For alex: I reconfigure the rx to the rvosd. I just changed the pcm fs point, who was a little bit too close of the throttle fs value. So we have:
full throttle<pcm fs point<throttle fs =ok
and... The rudder servo works! I think the rx battery was empty. But the elevator servo is really dead.
Could you give me a detailed explanation of the utilisation of cpd4 copilot? I read many times the manual, but I don't understand why I haven't response of the aileron and elevator servos when I move sticks. How the calibration works? Is it obligatory to plug the "rmt" cable to the rx? Note that I have only the first generation, so use the copilot separatly. Sorry for the photos, I can't make better: the rvosd is sealed into the fuselage, and I can't acess to the osd. I upload here a schema of my installation.I wish you could read it, because the picture is in low quality.
i'm quite interesst by your proposition of changing my old osd for the newest gen 3, but I don't want to restart all my installation. Thanks for your support.
pour elpimous: la plupart des "immersionnistes" oriente effectivement leur antenne patch selon un angle légèrement incliné vers le sol, ce qui augmente effectivement la distance au sol, mais réduit la zone de vol à celle située devant votre antenne patch. Donc vous ne pourrez pas voler autour de vous, ce qui reduit de moitié le surface balayé par votre ecran radar. Tout est une affaire de compromis!

[Alex Villa]

The diagram looks fine, try the system first without the copilot to make sure all the OSD outputs are working. Ff you configure autopilot mode on the OSD to be OFF, make sure to configure RVOSD internal failsafes properly, this to make sure the servos will not go to any crazy position when rclink lost its detected. If you toyed with the failsafe menus with the servo inputs disconnected this could make the failsafes to make the servos go to extreme positions when failsafes activated.

[kaloula]

It will be very hard to try the servos output without copilot, because it is very closed into the fuselage. But I'm sure the servos output are working, because I ever tested it before instal it in the ezglider. Alls the servos inputs are connected, as shown on the diagram, and rudder and esc reply to orders, exept for elevator and aileron servo.
The aileron and elevator fs are set to 1,5ms, who corresponds to the neutral position of the RC Tx stick (with sub trims set to 0)= this to make the CPD4 level the plane.
This isn't that the servos goes to crazy position, but that the elevator and aileron servos outputs are ignored by the osd:in fact, the osd ignore the elevator and aileron servo output because they're both plugged on the CPD4 copilot. How can I do to make the rvosd detect their signal, despite servos and osd are separated by the cpd4? Have I to make the cpd4 calibration before output signal is detected?
thx!:cool:

[Alex Villa]

It will be very hard to try the servos output without copilot, because it is very closed into the fuselage. But I'm sure the servos output are working, because I ever tested it before instal it in the ezglider. Alls the servos inputs are connected, as shown on the diagram, and rudder and esc reply to orders, exept for elevator and aileron servo.
The aileron and elevator fs are set to 1,5ms, who corresponds to the neutral position of the RC Tx stick (with sub trims set to 0)= this to make the CPD4 level the plane.
This isn't that the servos goes to crazy position, but that the elevator and aileron servos outputs are ignored by the osd:in fact, the osd ignore the elevator and aileron servo output because they're both plugged on the CPD4 copilot. How can I do to make the rvosd detect their signal, despite servos and osd are separated by the cpd4? Have I to make the cpd4 calibration before output signal is detected?
thx!:cool:
Ok RVOSD output the servo pulses sequentially on this order:

-Elevator
-aileron
-throttle
-rudder

And this is the same physical order they are on the board, the copilot wants the inputs to be sequential, so it is correct to put the copilot on elevator and aileron OSD outputs. However you most be sure that you dont conect the auxiliary copilot input to any place, because this will make it to go crazy. So the gain must be fixed and set manually, copilot auxiliary input disconected.

[kaloula]

I have never connected the aux input of the cpd4! have I to set the gain to maximum or maximum?

[elpimous]

Hello, Alex,

I have problems with autopilot !

- one day, (one month ago) after powering the plane (in last part), I waited nearly 1 minut before doing anything, And my plane ,without reasons, went on autopilot..
I was alone, without anything around (more than 4 km), and my radio was, of course, powered on !....First crash on a solid table !
????? I am in PCM dual conversion with FF7 / 41.200 Mhz, and R148DP as receiver ! (everything inside is protected from interference : alu and toroids)
Tests over 1,5 Km are successful !
I didn't touch anything !
Why did it happen ? (i powered off and on, and i was unable to recover control)
-----------------------------------

And today, another problem !
During more tests with autopilot, to have best security before flying over clouds, I tested my plane flight in normal/autopilot mode with powering on/off my radio.....

At the begginning, it was good, but AT THE END OF FLIGHT, AUTOPILOT DID WRONG THINGS, SO I POWERED ON RADIO !...AUTOPILOT STAYED...I WAS UNABLE TO RECOVER CONTROL (i was nearly 300 M from home, with normally perfect transmission : no trees, direct link !!!)

Here is the flight in question : you can see that normal/autopilot works good,
But at the end of video, autopilot stays (but i was playing with my radio , powering on / off, putting gaz/ ailerons, changind antenna direction, but nothing !)
http://www.vimeo.com/6330435
An idea ???
Thanks Alex
Vince:cool:

[Alex Villa]

I think it is a BEC cutoff problem, first notice temperature is around 60°C, if you dont have the external temperature sensor, this shows the OSD board temperature. I should expect something around 10°C over the air temperature, but 60°C is bad for sure. If the OSD its nearby your ESC, and this heat comes from it, then imagine the ESC-BEC temperature. When the BEC shut down, your receiver lost the power and also the servos, this explain the lost of control, because unpowered servos, and the autopilot displayed because the OSD does not detect signal from the unpowered receiver.

[Alex Villa]

Also I notice that you are running a 4S battery now, This also makes the BEC to get warmer, and thus reduce its current capabilities

[kaloula]

Alex, have you found why servos doesn't reply, despite aux in chanel(RMT) of cpd4 isn't connected to Rx?

[elpimous]

thanks, Alex for your quick answer.
A question, anyway !
I only use a 4s battery for all.
If the esc (where is the sensor) shut down, I won't have any servo...correct !
But, why is there motor, and osd display, and tx power ?
My esc is programmed for high cutoff !! So motor should have cut a wile before servos, don't you think ?
And I think that video tx and osd spend more energy than 4 servos.

I have another video with normal fly only without autopilot engage, with 76° esc, and no problems : osd ok, transmission ok, servos ok, idem motor.

Is it the first time it happened ??!

Well, without the crash, it was a nice moment ! I think clouds can wait a wile !:o

Bye, Vince

[Alex Villa]

ok the ESC didnt cut off, it was the BEC part due to overtemperature, so the ESC was functional, the OSD was sending commands to the ESC and servos, the ESC-motor worked because it had power from battery, the OSD works because it has his own regulators. But the servos didnt worked because the BEC circuit inside the ESC was shut down due to overtemperature. Basically the fail was on the 5V rail wich feeds the servos and receiver.

The ESC cut off when the battery voltage goes under certain threshold, this was not a case of low voltage shut down, but BEC overtemperature cut off(5 volt regulator for servos and Rx).

I have to say that the way the autopilot control the plane set a lot of stress on the servos, because it keeps making constant corrections to force the plane to the desired attitude. Thus the servos use more current than when the system its in manual mode.

My recomendation is to use a separate BEC.

[elpimous]

Big thanks, Alex !
I'll try this !
Vincent:cool:

I'm waiting for This BEC : Potencia 3.5A/45V BEC (User Selectable 5V or 6V Output)

I hope it will resolve this problem.

Thanks again, Alex.

[Alex Villa]

Alex, have you found why servos doesn't reply, despite aux in chanel(RMT) of cpd4 isn't connected to Rx?
I have to test here so I can know whats happening, I know some people used the copilot direct to the elevator and ailerons, using a failsafe receiver

receiver ail out--> copilot --> ailerons
receiver elevator output --> copilot --> elevator
receiver rudder output --> OSD --> rudder

but i know I did some tests with copilot and elevator rudder from the OSD, there is a post about this on the forum, let me search.

[Alex Villa]

ok this is the post:
http://rangevideo.com/forum/showpost.php?p=599&postcount=18

[kaloula]

wow, I'm not sure to understand this schema!
:eek:
Rx --> OSD --> Copilot --> Servo

Auxiliar --> Auxiliar In(control of the OSD)

Elevator --> Elevator In/out --> Elevator In/out --> Elevator servo

Rudder --> Rudder In/out --> Aileron In/out --> Rudder servo

Throttle --> Throttle In/out --> ESC

Auxiliar --> Aileron In/Out --> Copilot control

So the copilot will control the roll by the rudder whereas I have a 3 axes plane(rudder, elevator, aileron)? And how could work the AP, if it uses ALSO the rudder??
and why connected copilot control channel(auxiliary) to aileron in/out channel of the rvosd, and then to the other aux channel of the Rx? Why don't we plug directly copilot aux channel to aux channel of the Rx, without spend by the rvosd??
last question: on your schema, you say this:

Elevator --> Elevator In/out --> Elevator In/out --> Elevator servo

this has ever been tested, and sero doesn't reply. Or maybe if I connect exacly like your setup, servo elevator will work?:confused:
I say that but I haven't test this setup yet. If it works, you have my congralutations!

[kaloula]

OK, I did your setup and the elevator servo woks!? (ut I wnder why)
BUT: i haven't control of the rudder servo. It works just during the calibration.
whereas, How could the AP work if the rudder is connected to copilot and osd?
I have a 3 axes plane; So why the aileron channel isn't being use? sould I connect ailerons servos to the Aileron out of copilot, instead of servo rudder?

[elpimous]

Hello Kaloula.
For now, autopilot only control 2 axix : elevator and rudder
If U want (like me) use ailerons autopilot, U don't have to change anything on your rx, but just plugs ailerons in/out, in place of rudder in/out (on rvosd), and do the same with rudder.
Like this, your rudder stays your rudder, idem ailerons, but autopilot will control his "rudder"...........here are ailerons !!!

Here, in a 3 axis, the best controls are with ailerons and elevator.

From receiver, connect ailerons to rudder in osd, rudder out osd to copilot ailerons and copilot to servo...
....................connect elevator to elevator in osd, elevator out osd to copilot and copilot to servo... ....
OSD is just a pass thru !!!

Hope to help U
Bye,
Vince:cool: