Spektrum AR7200bx tail servo problem

[tworidersbolt]

Hi Guys I'm hoping that someone can shed some light on what I could possibly done wrong here.
Last night I was going through the setup of my 7200bx. I have an Align DS620 and know that it is working ok as it came off another heli that was flying great no problems.
I got to the point where I set the travel. Set it both ways till it bound and then backed it off, all fine had full travel in both directions. Then came out of the setup because I wanted to see that it worked in normal flying condition, and here lies the problem, I have very little movement in both directions, checked that that my radio which is a DX8 made sure that my end points were 100% in both directions and have no expo or dual rate applied. So I'm a little baffled at this point.

I'm setting the bx up on a Goblin and have checked the length on the servo arm and that correct as per manual.

[GIXERMAN]

I take it setup on 1520 rather than 760 frame rate.

[tworidersbolt]

yip set it to 1520

[tworidersbolt]

Still scratching my head on this, could it be the tail gain setting. I realised I had it on 0% when I set it up could it be that, what % in the TX should I have it when setting up?

[GIXERMAN]

Still scratching my head on this, could it be the tail gain setting. I realised I had it on 0% when I set it up could it be that, what % in the TX should I have it when setting up?

That would help matters, when I had a dx8 think I was set at 40 for starting point

[MarkG_R1]

I'm settled at 45% on my 450 and 550dfc

[tomatwalden]

Still scratching my head on this, could it be the tail gain setting. I realised I had it on 0% when I set it up could it be that, what % in the TX should I have it when setting up?

Honestly, I don't think the gain setting in your TX makes a difference during setup. What TX are you using?

EDIT : I might be wrong ... read the comments against this youtube video ...

SAB Goblin 500 - Tail Servo centering & movement problem? - YouTube

[waveydavey]

In your Tx channel screen does the slider go to 100% when you twizzle the stick

[GIXERMAN]

Honestly, I don't think the gain setting in your TX makes a difference during setup. What TX are you using?

EDIT : I might be wrong ... read the comments against this youtube video ...

SAB Goblin 500 - Tail Servo centering & movement problem? - YouTube

Tom he said after coming out of setup

[r4nd0m]

I think we saw this at the club once when the gear gain was set to be broadcasted on the wrong channel

[Obi Wan]

Still scratching my head on this, could it be the tail gain setting. I realised I had it on 0% when I set it up could it be that, what % in the TX should I have it when setting up?

Same sort of thing happened when we were setting the AR7000BX on my mates heli. Took it off my heli and put it on his and we set the end points and we could not understand why were not getting any movement. His gain on his transmitter defaulted to 0% - we altered that and all was OK.

Paul

[tworidersbolt]

yes when I go to the monitor on my DX8 the graphic moves from side to side so the channel is showing full extent ie 100 to 1000 both ways

[tomatwalden]

yes when I go to the monitor on my DX8 the graphic moves from side to side so the channel is showing full extent ie 100 to 1000 both ways

Does the vid I posted help? From the look of it, it sounds like what r4and0m mentioned - ie. gain not being broadcast on the right channel (or at all!)...

[bigbladelittleblade]

It will be the gyro gain in your transmitter, I had the same problem so I set the gain to 55% on normal, idle up 1 and also on hold, problem solved.
PS I use the spektrum DX7s transmitter, hope this helps but you might need to alter your gain either way to what I had to get it spot on

[Mark Chaplin]

Hi,

On the bench switch via your TX to 'rate' mode and see if you get full and free movement then . Heading hold will struggle as your heli is not in flight, therefore very little reaction. Set both gains to 50/50 to start with. Trim your tail in the hover in rate mode via adjusting your pushrod length. Switch to h/hold and away you go.

Hope this helps?

Regards,

Mark.