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HelicopterRadio - Spektrum DSM › DX7 anomole(Its the only one that has reversed channels...TWICE!
09-11-2007 06:37 PM  10 years agoPost 1
HHawk

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Gardnerville Nv.

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According to Horizon Service, one of my DX7's is the only DX7 that has ever reversed channels. First time was a few months back when only the elevator function reversed. Forward cyclic became back cyclic. I sent the RX back and got a replacement AR7000 which was nice of Horizon to do.
So I reset the T-Rex 450SE up and flew it a couple times(no problems) and parked it for a month. I get it out last week and flew it 3-4 times(again no problems) and it does it again. It never occured in the air, caught it on the ground luckily.
This time I set out to see if I could make it work by just revearsing channels in the radio. No luck there, but by moveing the AIL servo to the PITCH port in the AR7000, I got the cyclic working. Ail in the TX became PITCH. Collective was still reversed. But by going into the swash menu and changing the pitch from a positive to a negative and then the ele to a neg as well, it made it work! How many DX7's out there function with all -'s... -60 AIL, -60 ELEV, and -75 PITCH? NONE

Maybe its just me, but I find it HARD to believe that My DX7 is the ONLY one to ever do this. Maybe I should play the lottery

Any takers?
HHawk

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09-12-2007 03:43 PM  10 years agoPost 2
midwestpilot

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Crystal Lake, IL

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dont know hawk..

since you are the only one to post about it.. maybe pretty good

In life there is no spacebar!

Rich Erikson AMA 6175

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09-12-2007 06:37 PM  10 years agoPost 3
artimus

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Buckley WA

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Spetkrem crap

I have just had the Pitch servo reverse on two helis when I rebind my DX7...which can be a nighmare in its self....If I move to a new location they will bind...like a couple miles down the road....this has happened at two different flying fields. After they re-bind I took them out to fly and when I spun up the motor it wouldnt lift...when I backed off the gas it jumped into the air about 15 feet, the motor spun down and down it came....hard enough to crack one of my carbon fiber blades($120) on my Raptor 90. This also happen to my raptor 30 when I rebind ....but I caught it befor I lanched it. So now I check which way my blades pitch when I do a pre flight check.
There are bad DX7 recivers out there and seems I got two. I started out with Futaba years ago...now they have a handle onn 2.4gz looks like I will be selling my Spetkrem crap to some sucker and let him deal with it.

Fly Hard......Team Viagra

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09-12-2007 08:40 PM  10 years agoPost 4
HHawk

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Gardnerville Nv.

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VINDICATED! Thanks for posting artimus. I knew I couldn't have been the only one out there.
I wonder why its sooooo hard for manufacturers and distributors out there to admit that there are some problems out there with their products.
I guess its all about consumer confidence. I really like the Spectrum stuff, Like I said, I have two of them, and the one on the TRex 600 has worked flawlessly.

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09-12-2007 11:39 PM  10 years agoPost 5
pgoelz

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Rochester MI

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I wonder if it has anything to do with the magic reversing display? Mine dit that a couple weeks ago but I don't recall that any servo reversed. I was flying when I noticed the reversed screen so I would have noticed a reversed servo.

Paul

Paul Goelz
Rochester MI USA
http://www.pgoelz.com

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09-12-2007 11:54 PM  10 years agoPost 6
artimus

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Buckley WA

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HHawk
The reason that I spent close to $400 on a DX7 from a DX6 was to get the so called reliability of the Spektrum and how I have heard that there were no issues with other radios conflicts with them. Last week I went to the flying field at noon and was the only one there. I was flying my Raptor 90 , raptor 30 and a T-Rex 450 and with no issues all afternoon. Another flyer showed up about 3pm we flew till about 5pm when others stated showing up. Had a great time with all the guys....until another spektrum DX7 showed up. Now I turn no my Raptor 90 to fly ...it wont bind. After several attempts to get it to re bind and everybody telling me that this isn't supposed to happen with these radios and how to bind a Spektrum DX7 to a AR7000. I gave up on the 90. Switched over to the Raptor 30 turned it on and the same thing....would not bind. Got pissed off put everything in the car took it home, unloaded it and just for grins and giggles turned it on and both of them bound up the first attempt. Now thru all this the T-Rex has an AR6000 in it And I never had an issue with it.
One goes bad, that just luck of the draw, but two goes down with in just minutes of each other....that seems to be an issue that cant just be with my receivers.
Futaba ..I am sorry I every took you out of my bird....yea you gliched
and had too watch out for frequency conflict but you never did this to me......

Fly Hard......Team Viagra

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09-12-2007 11:59 PM  10 years agoPost 7
Paul Beard

rrApprentice

Bigfork MT

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HHawk,

Channel reversing and swash mixing do different things. Channel reversing reverses the direction of the servos. -ve swash mixes revese the result of the ccpm mix.

Give me your servo model numbers and I'll figure out if the reversing / mixes are correct.

I have several helis/servo combinations that yield all -ve swash mixes - this is nothing unusual.

Other than the intermitant screen flip, there are absolutely no known issues with the DX7/AR7000 at all.

Paul

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09-13-2007 12:04 AM  10 years agoPost 8
artimus

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Buckley WA

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Align Voltage Regulator

I have taken out the Align 2 in 1 Voltage regulators in both my Raptors to see if that may be a conflict with voltage and binding....will let u know the results.....

Fly Hard......Team Viagra

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09-13-2007 12:07 AM  10 years agoPost 9
artimus

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Buckley WA

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Other than the intermitant screen flip, there are absolutely no known issues with the DX7/AR7000 at all.
Dont look like you can say that any longer.....

Fly Hard......Team Viagra

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09-13-2007 12:09 AM  10 years agoPost 10
Paul Beard

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Bigfork MT

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artimus,

ok, that should be interesting.

The AR7000 performs a complete system check (including RF and voltage) before it connects to the transmitter. Another DX7 at the field will not interfer at all. If the AR7000 refuses to connect, and even worst 2 in the same day, it could be a faulty transmitter. Please send it to the service center if you are in any doubt.

Paul

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09-13-2007 12:17 AM  10 years agoPost 11
artimus

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Buckley WA

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Now thats what I thought also ...so I pulled out the DX6 tX and I would not bind to either of the two Ar7000...untill I got home about 5 miles away....now this not the first time this has happened. I have had this happen at another field and only with another DX7 near by.....so I would love to find the reason for this. People tell me this will not happen....I have proved that it does. What changes from the time that I leave the flying field and get home about 5 miles away......the other DX7 is out of range....hummmm?????

Fly Hard......Team Viagra

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09-13-2007 12:25 AM  10 years agoPost 12
JKos

rrProfessor

Redondo Beach, CA

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artimus,
Why are you trying to rebind at the field?

- John

RR rules!

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09-13-2007 12:30 AM  10 years agoPost 13
steve9534

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yakima, wa.

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Artimus

Paul has offered to check out the Tx and I think that is your best move. I can't see how the Rx could cause this problem although stranger things have happened. There are enough of the DX7 radios out there that I don't think there's an inherent defect in the system, but that doesn't mean that you can't get a few isolated defects. Send it back and let them make it right. The DX6 TX and the AR7000 Rx's aren't supposed to work together, so I wouldn't pay much attention to whether or not they bind, or when and how they might or might not do so. Hope this helps. steve.

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09-13-2007 12:57 AM  10 years agoPost 14
artimus

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Buckley WA

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JKos

Im not rebinding at the field by choice....it when I turn on the TX then RX .....nothing happens ...so then I try to re bind.

Fly Hard......Team Viagra

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09-13-2007 01:07 AM  10 years agoPost 15
artimus

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Buckley WA

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I am sorry ....Who is Paul? Are you Affilated with Spektrum? I am some what new to this form. I would love to find out what this problem is it is so intermittent.....I can fly by myself all day get around another Spektrum and mind goes down. Sending it in might get it fixed or I could just be without a radio for two weeks and still have the problem. In the two weeks that it will take to get it back I might as well buy a Futaba 2.4 system that works......and fly with every one.

Fly Hard......Team Viagra

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09-13-2007 01:14 AM  10 years agoPost 16
Paul Beard

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Bigfork MT

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artimus
Now thats what I thought also ...so I pulled out the DX6 tX and I would not bind to either of the two Ar7000...untill I got home about 5 miles away....
Are you sure about this?

The DX6 cannot bind or connect to an AR7000 nomatter how far away from the field you are.

The DX6 is DSM1 only.

Paul Beard
Spektrum

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09-13-2007 02:02 AM  10 years agoPost 17
artimus

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Buckley WA

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Paul

I ment the DX7 will bind not the DX6....sorry for the confusion. I tried the DX6 as a last resort at the field. Now I now why it didnt work.
I will send it to you and let you look at it.....it seem that when I take out the Align voltage regulator that the binding issues goes away....just got it to bind without it in the system. How senitive to voltage drop or spikes are the AR7000's? I recharge the system before every flight .

Fly Hard......Team Viagra

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09-13-2007 02:08 AM  10 years agoPost 18
JKos

rrProfessor

Redondo Beach, CA

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> it seem that when I take out the Align voltage regulator that the
> binding issues goes away....

Aaha! The Align regulator has been the source of troubles for many, many people; and not just with Spektrum receivers.

- John

RR rules!

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09-13-2007 02:56 AM  10 years agoPost 19
pgoelz

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Rochester MI

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HHawk,

Re your SPONTANEOUS servo revering..... it would be most enlightening if you could get a handle on the "normal" indications in the servo screen in the transmitter. And then take a look at that screen the next time something reverses. It would probably help a lot in pinning down whether the spontaneous reversing was happening in the receiver or (more likely given your history) in the transmitter. Or I guess it could even be the servo?

Has it ever done it after you have verified everything is going the correct way? Ie., does it ever happen after initialization?

I wonder if this is a bit more common than Spektrum thinks and is being blamed on the AR6100 hard over issue pre v1.2.

Paul (another one)

Paul Goelz
Rochester MI USA
http://www.pgoelz.com

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09-13-2007 08:21 PM  10 years agoPost 20
HHawk

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Gardnerville Nv.

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WOW where do I begin... Thanks for all the replies first off. My issue is definitelly a TX issue, although I sent back both the DX7 and the AR7000 that was in my 450SE.
Paul, Im useing Hitec HS 65MG's on the swash and a Futaba S9650/GY401 on the tail.
The first time I set it up in May, I had no issues during the build. It all tested fine on the bench. And then I get it to the test field, it initialized fine, failed the range test at 15ft, and the elevator function was reversed. That was the first time.
Like I said, it sat for a month after the month long wait to get a replacement from Horizon.
Then I set it up again, flew it a half a dozen times, and caught it again during the pre-flight checks. Additionally the gyro went out of tail lock into rate.
Paul I realize the difference between servo reversing and swash afr, but If a RX/TX work with a particular setup, for more than 1 flight, and then with no aparent reason collective is revearsed and on the right stick and right ele is now left ail, and ele is now on the left stick, something is seriously wrong. Dont get me wrong, I love the other DX7/AR7000 that I've been useing on my T-Rex 600E, its just that I first reported this issue to Horizon in May. So it is known, just not figured out yet If you wish to follow the repair with Horizon, feel free, Its under Howard Hawk

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HelicopterRadio - Spektrum DSM › DX7 anomole(Its the only one that has reversed channels...TWICE!
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