Align 3G Servo movements

[Liam B.]

Hello,
Have a few issues with my Align 3G. The front left servo (when looking at the nose) does not move. When tested it is fully functioning. All other movements are working fine. Anyone got any reasons why it might not be moving right? I've ran through the whole set up a few times.
Also does anyone have any transmitter settings for a Align 450pro FBL on Spektrum?
EDIT: I have managed to get that problem fixed but when throttleing up the swash rolls to one side, any reasons why?
Many thanks,
Liam

[coolice]

Hey Liam.

Sounds like you may not have set 3 servo, 120 degree eCCPM in the transmitter. Then on entering DIR mode, the 3G learns what swashplate mixing type it is being used with. This is how it can also work on mCCPM models, such as the older Raptors.

Have you gone through DIR mode? This also sets the mid point of the servos, which you adjust linkages to give 0 degree's pitch on the main blades.
Also check there is no trims in your idle up's, as this is a classic cause of movement as it's easily missed.

If you still have problems I'd suggest a complete model reset in the transmitter and start from a clean slate. This is also been a cause of many headaches when setting up Align's FBL units.
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[Liam B.]

Nope no luck, just wiped the model settings. Set the swashplate to 3 servo 120 degrees. And no luck. Just ran through the set up again with no luck, starting to give up!
Liam

[tourerjim]

Also you need to fit the 760 gyro as near to main shaft as possible on a 450 size heli

[tourerjim]

Nope no luck, just wiped the model settings. Set the swashplate to 3 servo 120 degrees. And no luck. Just ran through the set up again with no luck, starting to give up!
Liam

You've done all that in 17mins also going through dir, from reading Ian's post.?

[Liam B.]

I went through all of the stuff i have already set up, then reset my TX settings and changed swashtype and re-set up Align 3G. I've mounted the sensor on the anti-rotation bracket on a foam pad.
Liam

[coolice]

Hey Liam.

Changed reply, forgot first problem got solved.

Try moving the sensor off the anti rotation bracket mate, its a place of high vibration on the 450's and vibration can cause the servo movement you're seeing.
What happens is the swashplate guide pin rattles/taps inside the anti rotation guide, so it's like having a wood pecker pecking the gyro sensors.
.

[Liam B.]

Okay, i'll try that tomorrow. Where would you recommend i put the sensor?
Liam

[tourerjim]

Okay, i'll try that tomorrow. Where would you recommend i put the sensor?
Liam

As near to the underside of main shaft, as Ian mentioned vibes effect the gyro

[Liam B.]

Nope, nothing at all. Still the same issues when mounted almost dirrectly under the main shaft.
It has the effects. Could the fact that the only option set up on the TX is the 120 degrees 3 servo swash have anything to do with it?
Liam

[coolice]

Hey Liam.

It's just occured to me that you may have to reverse the servo channel which is going the wrong way, if you input aileron do the front two servos move in opposite directions?

You're using a Spektrum DX7s looking at your signature? Is there only one option with the swashplate mixing for 3 servo 120 degree eCCPM? I know some transmitters have variations on the same, I don't think the Spektrum set does but it's worth asking as you have one in front of you.

Another thing to do would be reflash the firmware to the 3G, are you able to reflash the 3G's firmware and have the dongle to do it with?
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[Liam B.]

Hello,
Sorry was making pancakes :P

I've just reversed the aileron and its moving and correcting to the correct side.
I'm using a 6v input into the rx i'm using. I'm sill having the issue of when throttling up the swash rolls.
Liam

[tourerjim]

Don't want to step into Ian's shoes on this one but just checked my old 450 3G & pitch servo does seem little more lazy than the others but when i tilt heli it then settles to a level swash, if you set yours to mid stick zero pitch then tilt heli does swash tilt away from direction of tilt & what does the servo do.?

[Liam B.]

For some odd reason i have no roll control, pitch works nice, elevator but roll i have nothing! The pitch servo moves fine too!
Liam

[coolice]

Hey Buddy.

This still sounds like a swashplate mix setting problem, or do you have the pitch servo signal wire in upside down, so it's not getting the signal to move?

It's got to be something like the the above, as if the other servos are moving but not the pitch channel, it's limited to this only. When you move the collective pitch, do two out of the three servo's move in unison? If only ones moves per channel input, this may give us a clue.
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