Nose creeps left in HH mode

[arne997]

I will try that but according to the manual of the 401, it should be possible.


Thanks

[skigolfmike]

I have the same problem. A slight drift to the left in HH. Good in rate mode.
I have done the reset by switching back and forth 3 times between HH/rate.
I have a little trim in my DX7 but since I have done the reset I suppose That is OK.

What can be my problem?

GY401 Gyro? If so, ideally, no sub trim and find a servo arm at 90* to the servo. If you use sub-trim, re-bind.

Is your tail spinning the right direction? That's what the problem was on mine. 2 clues: If the TR slider is offset towards the boom at neutral, and/or your TR blades are spinning counter-clockwise looking at the TR from the right side of the heli. (The side the TR blades are on, not the fin side.)

[arne997]

Yep a 401 and 9254 servo.

The Heli is turning to the left slowly.

[arne997]

What do you meen with re-bind if you have subtrim?
The 401 gyro resets the neutral trim every time you conect power to it.

[arne997]

counter-clockwise looking at the TR from the right


That is how mine is turning and normal what I know.

[skigolfmike]

Ah - counter-clockwise is correct. My bad. If the tail is turning clockwise view from the right - that's bad.

The reason you rebind with a DX7 after setting the sub trim is so the gyro will initialize correctly. Sometimes the gyro will initialize before the receiver connects to the TX. If you rebind, then the gyro will see the same neutral signal before and after the gyro connects. The 401 remembers (saves) neutral until you reset it and this way it won't get messed up on power up.

[mysticmead]

What do you meen with re-bind if you have subtrim?
The 401 gyro resets the neutral trim every time you conect power to it.
yes, the gyro reset neutral every time you power it. BUT, then it gets a subtrim signal from the radio and thinks that is a rudder input... then it tries to adjust for the rudder input and causes the drifting.

setting it for 90 degrees to the servo and having it setup without subtrim does not send a signal to the gyro, so it holds steady. rebinding the radio to the receiver might help but the correct way is to setup mechanically without subtrim

[arne997]

What do you mean by re-bind?
How do I do that?

Thanks

[mysticmead]

did you ever bind the transmitter to the receiver? using the bind plug and following the procedures in the manual for binding? if so... do it again..

[arne997]

I didnt. Bought it used. But I have heard somthing about it.

Can not see what that would do for this problem.
I will fix 0 subtrim and 0 normal trim.

[mysticmead]

after making any changes to the model setup in the TX, it is a good thing to re-bind the TX to the RX. this helps make sure that the RX will respond properly to the commands sent by the TX.. it's not absolutely necessary, just a good practice.

[mjdee14]

http://www.spektrumrc.com/Products/Default.aspx?ProdID=SPM2710

See the link above...it has some vids of how to bind.

[arne997]

Will this binding have any effect on my problem even if I delete all the trim and put it down to 0?

[arne997]

Where do I connect the binding-plug in to the AR7000?

I have a BEC so there is no on/off switch. Accoding to the instruction manual
I should connect to that one?

Thanks

[skigolfmike]

The bind plug always going in the battery slot.

So, put the bind plug in the battery slot, turn on the receiver first (only time you do this), Turn on the TX in bind mode (DX7 hold down the bind plug in the back during power up), hold the bind button on the TX init the receiver binds (Solid receiver light.) Turn off the receiver, remove the bind plug, cycle the power on the TX and you are good to go.

The reason you bind is the receiver remembers the TX signal inputs at bind. On power up of the receiver it uses these saved servo positions as the default until it connects to the TX. That way if the 401 initializes before the receiver connects to the TX, it sees the RUDD neutral position from the receiver and initializes. Otherwise you get the flashing light on the gyro and it may take several tries to get the gyro to initialize properly.

[arne997]

Binding still not fixed.
I dont know what battery slot that I can use without closing the power down? I use a BEC.
Are you talking about the slot when you are using a separate battery for the servos?
Anyone with more detailed explanation?



However I fixed the problem in HH!

Adjusted the gain from 70-75%. Readjusted the gyro and deleted all the trim and sub-trim.
The heli is steady now.

Thanks!

[mjdee14]

Binding still not fixed.
I dont know what battery slot that I can use without closing the power down? I use a BEC.
Are you talking about the slot when you are using a separate battery for the servos?
Anyone with more detailed explanation?



However I fixed the problem in HH!

Adjusted the gain from 70-75%. Readjusted the gyro and deleted all the trim and sub-trim.
The heli is steady now.

Thanks!


I had trouble binding mine until I put the bind plug in the battery slot. No other slot would do. You can power the rcvr from any slot but it seems the bind plug has to be in the batt slot. At least that's the only way i could get mine to bind. They usually show a switch in the system, which most of us don't use.

[Wazzer]

Yep MJ is right to bind the rx you need to have the Bind plug in the battery channel.

to do this if you are using a rx battery pack you can just plug the rx battery into any other channel so what i do is takeout one of the servos and plug the battery into that channel so you have power to do the binding

hope that makes sense

Ben

[Pinecone]

you have to adjust the trim mechanically. Otherwise your subtrim will lead to a small rudder input.
As I experienced, this is the cause: The AR7000 needs a couple of seconds to bind and THEN starts to work. In the same time, the GY401 initializes, and takes the zero input signal from the receiver as the zero point.
After that, the AR7000 starts to work and sends the subtrim to the gyro. And the gyro takes this new signal as a rudder input.

Complicate? My english isn't the best, hope you may follow

good luck, Stephan.

That is why, after setting subtrim, you bind the Rx again. This resets the zero input put out by the Spektrum Rx until it links to the Tx as the same as the Tx is putting out.