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Futaba 6EX 2.4ghz radio possible glitch - 5/2/2010 5:23 PM   
michaelwcollins


 

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Status: offline 		I have been flying my PA Addiction with Futaba's 6ex radio and I have started to notice some problems with my servos. First it was my rudder servo that wouldn't respond properly but that seemed to go away, and it happened while my brother was turning on his Spektrum DX6i radio so I stupidly dismissed it.

Yesterday I was flying, alone, and I lost up elevator response while trying to dodge some powerlines and managed to hit the planet instead. These are brand new Hitec HS65mg's and I don't think they are the issue.

I have the servo wire extensions securely placed and tied together and the servo wires were not coming loose from the rx. I noticed on the ground that I had full down response but momentarily had no up on the elevator then it "magically" cleared up. Too bad this was after my wheel pants were shoved through my wings and the prop was in two pieces.

Anybody have something similiar happen or have any advise on the issue?



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RE: Futaba 6EX 2.4ghz radio possible glitch - 5/2/2010 5:35 PM   
Steve Percifield


 

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Status: offline 		Try rebinding and make sure your battery is up to snuff.


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RE: Futaba 6EX 2.4ghz radio possible glitch - 5/2/2010 7:19 PM   
michaelwcollins


 

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Status: offline 		I'll try rebinding. The battery was freshly charged and only has about 9 or 10 flights on it.

The problem is intermittent, so the next time I connect it doesn't happen and it might start up while I'm in the air as it did previously.

No risk no reward I guess.

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RE: Futaba 6EX 2.4ghz radio possible glitch - 5/2/2010 8:12 PM   
Steve Percifield


 

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Status: offline 		what model receiver are you using? While everything is on and operating. Try wiggling all the connections. This seems like an intermittant power problem to me. Make sure the receiver always has the green light on while doing all the wire shaking and wiggling.


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RE: Futaba 6EX 2.4ghz radio possible glitch - 5/3/2010 12:04 AM   
michaelwcollins


 

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Status: offline 		I'll try anything, but each time it only occured with one servo and in one particular direction.

The first time was the rudder, full right with partial left.

Next was the elevator, full down with partial up.

Maybe I should only fly inverted and in left side down knife edge.

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RE: Futaba 6EX 2.4ghz radio possible glitch - 5/3/2010 12:19 AM   
Steve Percifield


 

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Status: offline 		Any chance you have another receiver to try? Or borrow one to try. Try testing and eliminating parts 1 at a time and see what happens. You may have a cold connection on the receiver power srtip that is allowing intermittant voltage spikes to the servos. That's why it would nice to know if the receiver is staying bound when this occurs. Also try eliminating the switch and see what happens

Whoops, Are you flying electric??? Then change your BEC .. If staying bound, the problem is the voltsge running to the servos, so the SCR, if using one, may be the problem.


just thinking out loud.
steve


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RE: Futaba 6EX 2.4ghz radio possible glitch - 5/3/2010 7:25 PM   
michaelwcollins


 

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Status: offline 		I rebound the receiver and experienced the same problem. I then switched out servos and the problem transferred to the new servo. It has to be radio or receiver related. FYI, I'm using an R606FS receiver.

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RE: Futaba 6EX 2.4ghz radio possible glitch - 5/3/2010 9:35 PM   
dant-RCU



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Status: offline 		It could also be the switch. I had a switch problem and discovered it when I was having intermittent problems
and the radio did not go into failsafe which indicated a loss of power.

You didn't say whether you went into failsafe or not - did you??

Dan


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RE: Futaba 6EX 2.4ghz radio possible glitch - 5/3/2010 10:39 PM   
MinnFlyer



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Status: offline 		Try using a different brand or model servo

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RE: Futaba 6EX 2.4ghz radio possible glitch - 5/3/2010 11:09 PM   
jester_s1


 

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Status: offline 		You've eliminated servos, so that's not it. Your problem is not system wide, so that should eliminate a battery, wiring or switch issue (although I would check those as electrical systems are by far the most common problem causers). That only leaves your radio system. If you have another reciever, give it an extended testing. If that goes well, you've found your problem. If not, then you either have 2 bad recievers or a bad transmitter or transmitter battery.

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RE: Futaba 6EX 2.4ghz radio possible glitch - 5/3/2010 11:29 PM   
Bax


 

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Status: offline 		How does the system perform when you use Futaba servos? Please be aware that all non-Futaba servos don't "play well" with Futaba equipment.

Also, you mentioned that the battery pack had 9 or 10 flights on it. If it was 9 or 10 flights since you charged it, is it possible that you were trying to fly with a depleted battery pack? If it was 9 or 10 flights total on the pack, how many flights since full charge did you have on the battery pack when the system started to act up?

A battery pack that's going low can cause a bunch of different problems. You get the intermittency because you don't have the same conditions all the time. Sometimes, your flying puts quite a load on the servos, which results in a lot of current flow that causes the battery voltage to drop quite a bit. That will give you problems because when the load is removed, the current goes 'way down, and the battery voltage comes up again. Usually, though, the lowered voltage will cause complete lockouts, and not "funny" servo movements.

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RE: Futaba 6EX 2.4ghz radio possible glitch - 5/8/2010 9:37 AM   
bret191


 

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Status: offline 		I want to put my 2 cents in, I have the same radio and have had to send it in for repair 3 times in two years. The last time Futaba even sent me a new EX and this radio has the same problem, ch3 eratic, channels reversing all by there self, touchy op. ect. My Ex's have been very unrelieable to say the least! Don't take any chances, send it in to Futaba for a check befor you loose a plane or two like me.
quote:

ORIGINAL: michaelwcollins

I have been flying my PA Addiction with Futaba's 6ex radio and I have started to notice some problems with my servos. First it was my rudder servo that wouldn't respond properly but that seemed to go away, and it happened while my brother was turning on his Spektrum DX6i radio so I stupidly dismissed it.

Yesterday I was flying, alone, and I lost up elevator response while trying to dodge some powerlines and managed to hit the planet instead. These are brand new Hitec HS65mg's and I don't think they are the issue.

I have the servo wire extensions securely placed and tied together and the servo wires were not coming loose from the rx. I noticed on the ground that I had full down response but momentarily had no up on the elevator then it ''magically'' cleared up. Too bad this was after my wheel pants were shoved through my wings and the prop was in two pieces.

Anybody have something similiar happen or have any advise on the issue?





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RE: Futaba 6EX 2.4ghz radio possible glitch - 5/9/2010 1:51 AM   
dash008


 

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Status: offline 		I have the 72 mhz version of the same radio (6EXP). I had the same problem, channel 3 (throttle) had a mind of it's own. It would jump around. I noticed it was doing the same thing on all my planes, some with different brand servos, so it had to be a problem with the transmitter. I also noticed I could sometimes get a couple flights in before it started acting up so I bought a new battery for it and so far the problem has gone away.

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RE: Futaba 6EX 2.4ghz radio possible glitch - 5/10/2010 9:31 PM   
michaelwcollins


 

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Status: offline 		The battery had a fresh charge and if it's a matter of Futaba radios not working with non-Futaba servos then I want no part of it. My next radio will be JR of Spektrum.

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RE: Futaba 6EX 2.4ghz radio possible glitch - 5/10/2010 9:53 PM   
MrCoffeeMax



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quote:

ORIGINAL: michaelwcollins

The battery had a fresh charge and if it's a matter of Futaba radios not working with non-Futaba servos then I want no part of it. My next radio will be JR of Spektrum.
That's a decision you'll live to regret!


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RE: Futaba 6EX 2.4ghz radio possible glitch - 5/10/2010 9:55 PM   
MinnFlyer



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RE: Futaba 6EX 2.4ghz radio possible glitch - 5/10/2010 10:38 PM   
ceecrb1



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Status: offline 		the 6ex does have cheaper pots on the control sticks.. Just last month I had to replace my throttle pot for just this reason..

as you move the stick from one extreme to the other, it will flutter..

the ultimate test for this is checking on another modle.... ask another club member with a futaba rigged plane if you can bind to theirs and test... this will rull out EVERY part at the RX end.


after investigating i found out that 6ex has cheaper parts that the 7c and up do no have..... MANY people have experienced problems with the throttle stick.. google it..

I managed to get a replacement and install it with zero effort.. but i´m an electrical engineer.... if you are half capable of souldering PCB's its no hardship to swap one and there is no calibrating process as the physical design of the tx forces the pots to a specific place.


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RE: Futaba 6EX 2.4ghz radio possible glitch - 5/15/2010 6:16 PM   
michaelwcollins


 

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Status: offline 		I have several friends and family members who fly JR and Spektrum and have had no problems. I used to fly JR but I got this radio for free and regrettfully got rid of my JR radio that I never had problems with. I doubt I'll live to regret going back.

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RE: Futaba 6EX 2.4ghz radio possible glitch - 8/22/2010 1:58 AM   
Soko42vv


 

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Status: offline 		RB1,
Where did you purchase the throttle pots for your 6ex? I need to do the same. Any part numbers you can provide would be appreciated otherwise I will just tear into the belly of the beast. My first stop would be digikey.

Tks

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RE: Futaba 6EX 2.4ghz radio possible glitch - 8/22/2010 2:27 AM   
Penuts


 

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Status: offline 		If you go to the thread under Questions and Answers look for the thread Airtronics Radio (penuts) and about the forth down i made another statement why im looking for another radio,it gives you the details why i want to change from Futaba to ??? you just might find it interesting.No more Futaba for me. That was the last straw.

Dick

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RE: Futaba 6EX 2.4ghz radio possible glitch - 9/2/2010 10:13 PM   
marshr


 

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Status: offline 		On my Futaba 6EX 2.4g transmitter, about three years old, the throttle began to jump at full throttle a month ago. It would behave normally if I applied some slight upward pressure against the stick, but would begin to jump about a click below full throttle if I didn't. It did the same thing on three other airplanes and none of the airplanes did this when I rebound them to my 7C 2.4 radio. I wrote to Futaba service and to Radio South and asked if these had been a frequent problem. Futaba said no, and Radio South said yes. Radio South made the repair and all is fine on the throttle now, but a month after that repair, the aileron stick is doing the same thing at full right. The pots in this radio are considerably cheaper looking than I see in my 7C, T6XAS, or even the 6EX-pcm. I am in the process of obtaining three replacement pots so I can replace the one that is now bad and have two more on hand when the other two go bad, which I expect to happen. This radio should be recalled IMHO. If anyone has had any luck with Hobbico Service in that regard, I'd like to hear about it. Meanwhile, if you have any simliar problems as this, Radio South has been good and I only wish I had had them replace all four pots the first time instead of just the throttle pot. Not wanting to throw more money into a three year old, low-end radio, I will replace the pots myself and see if I can keep it running a little longer. This model sure isn't made like my two T6XAS's that are 8 years old, thousands of flights, and going strong.....

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RE: Futaba 6EX 2.4ghz radio possible glitch - 9/3/2010 3:22 AM   
red head


 

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Status: offline 		Just a thought: Are you using the " CORRECT " servo arms ???? Their not all the same !! ENJOY !!! RED

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RE: Futaba 6EX 2.4ghz radio possible glitch - 12/1/2010 4:33 PM   
longbaot


 

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Status: offline 		I just searched this site because my 6ex has the same problem as described above. Several in my club bought Futaba 6EX at the same time. After very little use (less then one hour) the pots have failed. I am still using Futaba radios that are 15 years old and have never had a problem. The new 6EX not so much. I am not fixing mine it is going in the junk.

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RE: Futaba 6EX 2.4ghz radio possible glitch - 12/1/2010 4:50 PM   
marshr


 

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Status: offline 		Thanks for suggestion on servo arms. Yes, nothing changed there - same stock Futaba arms on the Futaba servos, but I've seen where others have forced JR (or was it HiTec ? anyway not the problem here) arms on Futaba's or other way around, with resultant slippage. No, the issue is the potentiometers, as confirmed by Tony at Radio South and by the fact that when I changed the second one myself, the issue went away. It 'probably' isn't a 'plane crasher' since the jumping only occurs at the extreme end of the stick movement. At the center-range, everything works normally, but when you get to the full throw of the stick, it will jump or should I say, twitch some.

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RE: Futaba 6EX 2.4ghz radio possible glitch - 12/1/2010 5:47 PM   
orbsah


 

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Status: offline 		Anyone know if this pot issue relates only to the 6EX on 2.4GHz and not the 6EX on 72MHz? I have a 6EX on 72MHz and have not noticed this (although now I'll be on the lookout).

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