RunRyder RC
WATCH
 1 page 784 views POST REPLY
HomeRC & PowerAircraftHelicopterFlybarless Rotor Head SystemsAlign 3G › 3gx on 450 pro v2
08-07-2012 03:26 AM  6 years agoPost 1
magicmalik

rrApprentice

Bayonne, NJ

My Posts: All  Forum  Topic

Im running a 3gx on the 2.1 software on my 450 pro v2. When I fly, it will track decently, sometimes tail feels like it slightly drifts in backwards flight. My main issue is that around center stick, the heli feels kinda wobbly. I know if it oscillates, you should turn down the gain.. but it only feels this way during slower movements around center stick. And if I punch it to a hard climb, it does not climb straight.. it will tilt forward and off to a side.. so I feel like lowering the gains would only make this worse. I do not have much experience with adjusting parameters in the software. If anyone could give me advice if they have had a similar situation, id appreciate it. Thanks

http://www.facebook.com/profile.php?id=8826230

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
08-07-2012 02:28 PM  6 years agoPost 2
coolice

rrKey Veteran

Northamptonshire, England

My Posts: All  Forum  Topic

Hey.

The wandering offline during the climb sounds like the swash plate isn't staying level at full collective pitch.
Now you cannot correct this by altering the channel ATV's, so you will need to look at your model setup while in DIR mode and make sure all 3 eCCPM servo arms are level at mid stick. If they are out then the control will move in a different arc compared to the other 2 servos connected to your swash and this is where it can become unlevel.

The wobbling feeling is through the gains, the vertical climbing issue should not be effected by lowering them, as I'm sure it's the servos not being setup in exactly the same mid stick position as one another.

With the tail, what gain percentage are you running? Also what length tail servo arm?
I'm always inclined to run a slightly shorter arm than recommended, which then allows me to wind the gyro gain up a bit more for better hold.

I'd suggest going over your DIR mode setup, to be sure your servo arms are parallel to one another. It's difficult on the 450's but try to keep sub trim to a minimum and swap your servo arms around until you find the combination which means adding the least sub trim. It's time consuming, but worthwhile.
Then go through the rest of the DIR settings steps and try again.

Out of interest what settings have you set within the PC software?
.

Ian Contessa
Team Robbe SchluterUK
Midland Helicopters

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
08-07-2012 04:50 PM  6 years agoPost 3
ticedoff8

rrKey Veteran

Morgan Hill, CA. USA

My Posts: All  Forum  Topic

+1 Above.
And, I would check the servos - it could be one weaker servo.

Believe 1/2 of what you see and none of what you hear.
Fake News will be the downfall of our Republic!

PM  EMAIL  GALLERY  Attn:RR  Quote
08-08-2012 10:47 PM  6 years agoPost 4
magicmalik

rrApprentice

Bayonne, NJ

My Posts: All  Forum  Topic

I will go over my servos as soon as I get some time and also post the settings on my 3gx. I know mechanical setup is a must before electronic setup.. and while I thought I had checked for a nice level swash when I put together the 450pro, I may have not checked it well enough. Hopefully this solves the problem of it not climbing straight during punch outs. However, im just wondering... flybarless systems work on 3 axis gyros, so if the swash was off and not level somewhere, shouldn't the gyro's pick up movement of either the heli pitching forward or back or off to the side without any user input and stop this from occurring (or maybe not 'stop', but keep it to a minimum and correct for it once it starts)? Like I said above, I know mechanical setup is always necessary and im not asking this trying to take a shortcut.. im just curious because I thought stopping unwanted drifts and off axis movement corrections were part of the advantages of flybarless systems.

http://www.facebook.com/profile.php?id=8826230

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
08-09-2012 03:50 AM  6 years agoPost 5
Mahu

rrApprentice

Panhandle , FL

My Posts: All  Forum  Topic

Start from level
You have to remember, the gyros are set to go from a level point, this means all servos are set to relatively the same point at center throttle stick. If the swash is not level with the setup the gyros will only be able to use the unlevel setup for refrence. This confuses the gyro and they try to get back to a level state but the swash is not where it should be and throws off the math. A computerized system will only be as precise as the original setup, GIGO. If the swash is not level then the gyros will not be able to make up for it properly during flight.
Check the math.

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 1 page 784 views POST REPLY
HomeRC & PowerAircraftHelicopterFlybarless Rotor Head SystemsAlign 3G › 3gx on 450 pro v2
 Print TOPIC  Make Suggestion 

 3  Topic Subscribe

Friday, October 19 - 11:10 am - Copyright © 2000-2018 RunRyder   EMAILEnable Cookies

The RC discussion world needs to consolidate. RR is now one choice for that. Its software is cutting edge. It hosts on-topic advertising. Help RR increase traffic buy making suggestions, posting in RR's new areas (sites) and by spreading the word.

The RunRyder Difference

• Category system to allow Rep/Vendor postings.
• Classifieds with sold (hidden) category.
• Classifieds with separate view new.
• Answer PMs offsite via email reply.
• Member gallery photos with advanced scripting.
• Gallery photo viewer integrated into postings.
• Highly refined search with advanced back end.
• Hosts its own high end fast response servers.
• Hosts thousands of HD event coverage videos.
• Rewrote entire code base with latest technology.
• No off-topic (annoying) click bait advertising.
Login Here
 New Subscriptions 
 Buddies Online