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Heli Wholesaler . 3D Heli Depot . JR-Spektrum

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Radio - JR & Spektrum DSM > Strange glitch-like problem
 
 
creightoncarr
Key Veteran
Location: Missouri City, Texas - USA

Had some problems today with the electronics in the Aurora. Setup is as follows: YS91SR w/SB-19, 8717's on cyclic and throttle, Solid-G with BLS251, and AR7100R. Cyclic servo's running at 8v and throttle servo, gyro and tail servo regulated at 5.2v. Radio is a JR 12X 2.4. Everything was brand new when installed in the helicopter.

5 flights on the helicopter yesterday with no problems and the first three flights this afternoon with no problems. On the fourth flight as soon as I flipped into idle up the heli started jumping around without any input from me. Almost as if I were doing quick pitch pumps. I checked it out on the bench but couldn't find any problems. Rebound the receiver to the radio and went out to try it again. Same thing, lifted into hover and everything seemed fine. Flipped into idle up and it started jumping around again. I can't recreate the problem int he bench. I checked all the servo leads to make sure they weren't chafed. Tried tugging and twisting the leads while giving cyclic and collective inputs and everything responded normally.

I've had similar type problems in the past when the pot was bad on a servo and the servo started to do things on its own, but that caused the helicopter to either role to the side or pitch forward or backward since it was just one servo on a CCPM setup. This time it seems likes whatever is happening in flight is causing all of the servos to move together because the helicopter is not rolling or pitching, it jumping straight up and down rapidly.

Any thoughts as to what could be causing this problem? I wish I could recreate it on the bench but it doesn't seem like I will get that lucky this time.
06-16-2008 02:57 AM
 
 
JodyJ
Heliman
Location: Irvine, CA

I'm having some what of the same problem, but with only the throttle servo. On the bench sometimes I can get it to glitch, but once I moved the pitch up and down it never happens again. I've been flying with this problem for over 10 flights. I have the following:

600N
8717 x 4 (throttle and cyclic)
611 w/9256 tail servo
AR7100
ATG

I'm running everything on the 8V side, except for the 611 and 9256. Never had this problem when I was using the AR9000.

I'm going to use the AR7100R on my Synergy with the same setup above and we'll see what happens.

Jody J.
06-17-2008 12:10 AM
 
 
creightoncarr
Key Veteran
Location: Missouri City, Texas - USA

I'm putting a new AR7100R in the Aurora. Since all of the servos are acting out together, I don't see how it could be anything other than the radio or the receiver. I doubt it's the radio as all of my other models behave properly on the same radio.
06-17-2008 12:24 AM
 
 
RAK402
Veteran
Location: Alhambra, CA

I am very interested in what you gentlemen find out.

It appears that you are both using the AR7100 with the 12X?


For comparision purposes, I have about 20 flights now on a Raptor 50 with a JR921 and 12X. So far, so good (very solid).

Please continue to post what you find.
06-17-2008 04:55 PM
 
 
creightoncarr
Key Veteran
Location: Missouri City, Texas - USA

The new receiver is in and ready to go. I hope to get a chance to try it out this evening. I will report back with the results.
06-17-2008 05:06 PM
 
 
JodyJ
Heliman
Location: Irvine, CA

I'm actually using the JR x9303 2.4GHz radio.

I just removed the AR7100 and installed the AR7100R on the 600N. I will let you know guys know if I have the same problem.

Jody J.
06-17-2008 05:38 PM
 
 
creightoncarr
Key Veteran
Location: Missouri City, Texas - USA

The new receiver seems to have solved the problem. Put 4 tanks on the Aurora this afternoon and was well again. Going to send the first receiver back to Horizon and see what they find wrong with it.
06-17-2008 11:22 PM
 
 
karman
Senior Heliman
Location: Cape Town, South Africa

aerial

hi

read somewhere that the small aerials have tendency to break off on the board itself after few flights and cause funny interference.

you'll still have good reception from satellite receiver.

apparently it still looks fine, but if you pull on it, it comes off.

maybe worth checking?
L:
06-27-2008 09:27 PM
 
 
creightoncarr
Key Veteran
Location: Missouri City, Texas - USA

I posted about that in another thread. Turned out that was my problem. The antenna had broken off the board on the main receiver. Happened on two different AR7100R's I had. I've now put a bunch of glue around the solder joint on the new ones in hopes that will provide a little better protection.
06-27-2008 10:13 PM
 
 
Aerowizzard
Heliman
Location: Laval, Qc. Canada

Big problem

I have a DX7 with the AR6200 in 2 Sceadu Evo 50. One of the helico start curious problem last week. I was landing and it was like I switch to Idle up. The helico went full throttle with right aileron and crash at 6 inches from the ground. I tought that I made a mistake with my switch and not looking for other problem, I rebuild the machine. No problem with the second helico. Same problem occurs yesterday but this time I was landed and I cut the throttle without killing the engine and I was going to pick my helico and suddenly it went full throttle with right aileron and the same result as the first crash.

I went home and checked everything and decide to rebind the AR6200. It worked for 5 minutes and no more contact after that. My question is: why does the system goes full throttle and aileron instead of keeping evrything in the last known position ???? Anyone have an idea?

Thanks
06-28-2008 05:08 PM
 
 
pgoelz
Senior Heliman
Location: Rochester MI

Check your failsafe positions..... with the transmitter off, turn the heli on. Does the aileron move full right? If so, it sounds as if the receiver rebooted. "Why" remains to be seen.....

Paul Goelz
Rochester MI USA
http://www.pgoelz.com
06-30-2008 05:44 PM
HOMEPAGE  
 
 
audio131
Veteran
Location: swansea , mass , usa

hi

i have been seeing some of this lately

"if their is no grass on the blades you are not doing it right"
06-30-2008 10:25 PM
 
 
audio131
Veteran
Location: swansea , mass , usa

hi

should call horizon and let them know of this problem,, if enough people call they my try to fix it

"if their is no grass on the blades you are not doing it right"
07-01-2008 02:58 AM
 
 
Janis
Senior Heliman
Location: Århus, Denmark

Hi

This really sucks. I just installed an AR 7100 in my Heli with V-Bar.
So now I can risk my model because the receiver can't hold the amp for the thre - 8717. Funny because these are the only Highvoltage Servos in the marked.
It seems they haven't tested the ampflow in a 90 ship.
The first time I read about 173 mah ampdraw in a 50 I thought you > must be kidding<-this isn't true.........

So now I can fly and risk the model-or I can sit at home and look at it an think how it may fly in my mind

Regards from Denmark.

...exist something better than V-bar and women...
07-01-2008 09:02 AM
HOMEPAGE  
 
 
creightoncarr
Key Veteran
Location: Missouri City, Texas - USA

Quote 
i used over 500mah every time on a 6-7min

As much as I agree with regard to just about everything else said concerning the AR7100 receivers, something is wrong if your using 500mAh or more per flight, even with 8717's at 8V all the way around. Maybe if your flying extreme hardcore crack style for the entire duration, but otherwise I don't know anyone pulling more than about 270-330mAh per pack on a 90-sized ship for six and half minutes with hard flying. Sport flying I've seen less than 200mAh for the same duration.
07-01-2008 02:20 PM
 
 
audio131
Veteran
Location: swansea , mass , usa

hi

hi,, i really bang the heli around the whole time,, everytime i was to charge the pack after a flight it was over 500 mah back into it,i use a 18c 2s 1900mah align lipo pack,,, when i was running a fromeco 6v to the 8717's i was seeing about 300mah...

"if their is no grass on the blades you are not doing it right"
07-01-2008 05:32 PM
 
 
floop
Senior Heliman
Location: Deptford - Southern, NJ

22 flights on the AR7100 with Multigov pro and 8717's. So far I haven't had any issues. How did you glue the wire? Did you take the case apart or do it on the outside?

Thanks
chad



IT's what I do.
07-01-2008 08:36 PM
 
 
creightoncarr
Key Veteran
Location: Missouri City, Texas - USA

I opened the case and put the glue on the board around the solder joint.



It's not pretty, but it's better than it was before:



You can't really tell from the photos. but there is glue on the left side of the joint as well and around the backside of it. I've got about ten flights on this new receiver with the glue and so far so good.
07-01-2008 08:57 PM
 
 
Dakine
Elite Veteran
Location: OC, Commifornia

Scary!

I've got the same set up on my Aurora.....7100 Rx, 8717 servos, running 8 volts. On my second test flight, I felt two small glitches. Now I'm worried.
07-02-2008 08:05 AM
 
 
marked23
Key Veteran
Location: Lynnwood, WA

Has anyone used an optional second remote receiver? Would that mitigate some of the risk of the antenna breaking off?

I have extra remote receivers and I was planning on using them anyway.

-Mark
07-07-2008 11:51 PM
 
 
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Radio - JR & Spektrum DSM > Strange glitch-like problem
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