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T-REX 500 › 3GX on the Align 500 EFL with DX6i - question..
12-04-2011 12:26 AM  5 years agoPost 1
Scott4991

rrNovice

Westminster, CO

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Hey Guys,

I have a new 500 EFL, installing the radio now. I've been told that the DX6i will not work with the 3GX - but it seems to work fine. I utilize 2 Spektrum satellite Rx's and it sync's up just fine. I have a Gyro switch, channel 5, which toggles the 3GX light from Green to Red, indicating heading hold or not. All seems to be working fine. I don't plan to run a governor at this time, so no more channels are needed.

My options are to run a secondary dedicated Rx and plug satellites into this - then from this to the 3GX via supplied cables. This may be a more secure link, but the 3GX with satellites seems to work fine on the bench. I will, of course, range check this setup before flying.

Heck, I got it.. one servo was reversed.. working fine.

Thanks

Scott

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12-04-2011 08:44 PM  5 years agoPost 2
dkshema

rrMaster

Cedar Rapids, IA

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What was the reason you were given that the DX6i wouldn't work with a 3GX? I think the only thing you'd lose is the ability to use a governor (nitro only).

I see no reason a DX6i wouldn't do the job, you just end up using the GEAR channel (5) to run the gyro gain, but that's nothing different than using a 6 channel RX in a heli.

It also won't matter if you use a separate dedicated receiver or go the satellite route.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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12-05-2011 12:47 AM  5 years agoPost 3
Stephen Born

rrElite Veteran

USA

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Dave, is a satellite just as strong as the receiver itself? I am referring to the binding process and locking the connectivity.

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12-05-2011 01:26 AM  5 years agoPost 4
jsenicka

rrProfessor

Eagle River, WI

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The satellite is the receiver.
The thing you call the receiver (the thing where servos plug in) is really just the "servo bus", with possibly a satellite configured in the case.
So an AR7000 is a servo bus, plus a satellite in the main case, and a second sat external.

So a 3GX with two sats has exact same receiver circuitry as an AR7000 or AR9000 running a single external sat

Jim Senicka
Team Manager, GrandRC Flight Team

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12-05-2011 01:50 AM  5 years agoPost 5
dkshema

rrMaster

Cedar Rapids, IA

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The 3GX will operate with a separate receiver, or it will operate with the Spektrum/JR receivers directly plugged into the ports on the side. In the first case, the external receiver does all the RF work for you and provides the channel specific information to the 3GX system so it can control the servos.

In the second case, you don't USE an external, extra receiver. The satellites do the receiving for the 3GX. Their output, a serial data stream, is processed by the 3GX system to provide the servo decoding and appropriate servo control and mixing.

I just purchased a couple of 3GX systems on Black Friday and am working on getting them installed. I'll be using an external RX, as I already own them, and didn't want to spring for additional satellites. In the future, if I stick one on a Trex 250, I'll go the satellite route.

Binding and reception with the satellites installed in place of a standard receiver is pretty much the same process.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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12-05-2011 02:34 AM  5 years agoPost 6
Stephen Born

rrElite Veteran

USA

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Thanks for the info Dave and Jim. I have the 3GX, and will be using 2 satellites. I am using my AR7010 for my camera gimbal. Thanks again guys!

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12-08-2011 07:01 PM  5 years agoPost 7
Scott4991

rrNovice

Westminster, CO

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DX6i --

I think the reason I was give is that if I wanted to use a Governor, it would not work. Also, I think there is some issue using 2 remote satellites from the 3GX - not sure what this is, but I recall someone saying the DX6i would not work with 2 Rx's - I dont' see why not, but I do not know.

Scott

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12-11-2011 06:39 PM  5 years agoPost 8
HybridHeli

rrApprentice

East Texas lawman

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The issue is that with a direct sat link setup the gov. is channel 5 and the gyro gain is ch. 7 hence with a direct link setup you cannot use the dx6i and have gyro gain control.
If you use the complete separate receiver, the issue goes away as the gyro gain remains ch. 5.

__________
nothing automatic about autorotations man..

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12-11-2011 08:42 PM  5 years agoPost 9
dkshema

rrMaster

Cedar Rapids, IA

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That's pretty much the same limitation you get if you fly a nitro heli on 6 channels...no governor.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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12-12-2011 04:25 PM  5 years agoPost 10
HybridHeli

rrApprentice

East Texas lawman

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Well it’s actually more than just ‘no governor'.

I was answering Scott4991 post above about what the issue was

“I recall someone saying the DX6i would not work with 2 Rx's - I dont' see why not, but I do not know”

People will get confused and think that with just ‘no governor’ I’ll still be ok (since not everyone needs the governor function as in this post).

He will not have GYRO CONTROL on his electric using the hardwired satellites with six channels (he actually WILL have gov. function on ch5 with hardwired satellites and DX6i).

The governor we may be able to live without but it’s really the lack of the gyro control (ch7) that is the issue with hardwired satellites.

That problem goes away if he uses the DX6i with the traditional receiver setup and 3GX as it then reverts back to gyro = ch5 and gov = ch7.

__________
nothing automatic about autorotations man..

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12-12-2011 07:46 PM  5 years agoPost 11
magbarn

rrNovice

Riverside, CA

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Scott: please pay attention to what hybridheli is talking about. IF you're using 2 satellites ONLY with no full receiver witht he 3GX, you WILL NOT HAVE gyro gain control on your radio. You can do it, but you'll need to plug in the 3GX to your computer each time to adjust the gain. I think when you think you're adjusting the gyro gain on your DX6i, you're actually just adjusting the governor and it's the governor's light that's changing. Just saw a guy a few months ago who argued with me on this issue and proceeded to crash his heli on it's maiden flight.

Please see the top of page 22 in your manual. It's confusing, but you need to see this:

These assignments CAN NOT be changed when running in satellite only mode.
Notice the gyro gain is AUX2 which is channel 7, which the DX6i can't do.

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12-13-2011 12:29 AM  5 years agoPost 12
coolice

rrKey Veteran

Northamptonshire,​England

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Hey.

Hybridheli is spot on, you cannot control gyro gain when using sats on the 3GX as gyro gain defaults to AUX2 (channel 7).

Unfortunately you can also not control gyro gain through the pc software, as while there is a slider for this, without the gyro gain connected to a working channel you cannot engage heading hold mode. The 3GX will be in rate mode only, denoted by the red gyro led.

To use a DX6i with a 3GX you need to use an external Spektrum receiver and wire it to the 3GX using the supplied leads.
.

Ian Contessa
Team Robbe SchluterUK
Midland Helicopters

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12-13-2011 12:58 AM  5 years agoPost 13
Evan03

rrVeteran

Idaho

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im flying a 600 nitro with a dx6i

if i was to run a beast along with 7100 cani then get control of the gov in the 7100r?

its looking like i just need a dx7

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12-13-2011 09:06 AM  5 years agoPost 14
coolice

rrKey Veteran

Northamptonshire,​England

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im flying a 600 nitro with a dx6i

if i was to run a beast along with 7100 cani then get control of the gov in the 7100r?

its looking like i just need a dx7
Hey buddy.

No, the receiver will be capable but still your DX6i will be the limiting factor as it cannot control the 7th channel.

A DX7 will be the easy answer and will work all channels of the 3GX.
.

Ian Contessa
Team Robbe SchluterUK
Midland Helicopters

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12-13-2011 12:45 PM  5 years agoPost 15
Evan03

rrVeteran

Idaho

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i was just curious.

thanks

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12-13-2011 01:21 PM  5 years agoPost 16
dkshema

rrMaster

Cedar Rapids, IA

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Unfortunately, if you're flying a nitro heli and want to run a governor, you MUST have a MINIMUM of seven channels available to control it. This is NOT a 3GX limitation, it is a real, physical limitation.

If you really want to run a governor with a six-channel radio, get hold of Throttle Jockey Pro (NOT the Throttle Max unit) -- one that still has the ability to set RPM manually using a screwdriver-adjustable potentiometer built-in. (You might want to check with Kurt at Model Avionics to make sure that feature is still available before buying).

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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12-13-2011 03:21 PM  5 years agoPost 17
Stephen Born

rrElite Veteran

USA

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I have the DX6i and the 3GX. So if I want to adjust the gyro gain, I either need to use my AR7010 or purchase a DX7? If I did use the servo bus, can I still plug in 2 satellites in the 3GX? Doing so, I would have 3 satellites. (1 servo bus, 2 satellites)

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12-13-2011 03:34 PM  5 years agoPost 18
coolice

rrKey Veteran

Northamptonshire,​England

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I have the DX6i and tbe 3GX. So if I want to adjust the gyro gain, I either need to use my AR7010 or purchase a DX7? If I did you the servo bus, can I still plug in 2 satellites in the 3GX? Doing so, I would have 3 satellites. (1 servo bus, 2 satellites)
Hey.

No, you would not be able to plug sats into the 3GX as well. All recevier dutys now would be handled by the AR7010 receiver, with the 3GX just acting as a FBL controller between the receiver and servos.
.

Ian Contessa
Team Robbe SchluterUK
Midland Helicopters

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12-13-2011 03:36 PM  5 years agoPost 19
Stephen Born

rrElite Veteran

USA

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Got it. So just plug satellite into receiver?

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12-13-2011 03:39 PM  5 years agoPost 20
coolice

rrKey Veteran

Northamptonshire,​England

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Got it. So just plug satellite into receiver?
Thats it buddy, as per a normal Spektrum receiver and sat setup.
.

Ian Contessa
Team Robbe SchluterUK
Midland Helicopters

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T-REX 500 › 3GX on the Align 500 EFL with DX6i - question..
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