RunRyder RC
WATCH
 1 page 1458 views TOPIC CLOSED
HomeAircraftHelicopterFuel-Helicopters New or Limited ActivityNext D › Setting up Cyclic Servos for Flybarless - Throw & Centering
12-27-2010 10:26 PM  7 years agoPost 1
Rockohaulic

rrElite Veteran

Canyon Country, CA, USA, 3rd Rock from the Sun

My Posts: All  Forum  Topic

I'm setting up the cyclic servos and they do not seem to have a lot of throw compared to a flybar system.

I have set the travel adjust to 150 like the Total G instructions say, but there just doesn't seem to be a lot of throw.

This would seem to make it harder/more critical to get these servo arms in exactly the centered position at mid-stick.

Is there something else I am supposed to do to get more throw in the servos????

By the way, once mounted, are you supposed to use any sub-trim to center them?

Or is sub-trim a huge no-no just like it is with a tail servo???

Thanks guys!

Saturday morning I flew my helicopter in my pajamas
How it got in my pajamas I'll never know

PM  EMAIL  GALLERY  Attn:RR
12-27-2010 11:31 PM  7 years agoPost 2
Supercoolheli

rrKey Veteran

Dallas, TX

My Posts: All  Forum  Topic

Sub trim isn't bad...i just had a big discussion about this. And i agree, my servos don't seem to have too much throw on the ground either but in the air MAN IT'S FAST. here's the link to my thread on sub trim.

https://rc.runryder.com/t623603p1/

PM  EMAIL  GALLERY  Attn:RR
12-28-2010 12:25 AM  7 years agoPost 3
ssmith512

rrKey Veteran

Indianapolis, IN USA

My Posts: All  Forum  Topic

You can use subtrim, OR you can use the servo neutral adjust values in the Total G software. I left my subtrims at zero, found the servo arm position that most closely represents "90 degrees" (note that the arm wont be 90 to the servo case, but should be parallel with the mainshaft), and then used the servo neutral adjust in the Total G software to get the swash plate level at mid stick - zero pitch (after ensuring all linkages were identical in length).

With FBL, it is pretty critical that the swash be level at mid stick, and the all servo arms, linkages, and bell cranks are "90" to ensure maximum performance of the Total G. So take your time with the setup.

A good tip is to power up the Total G with some FC gain, and then once it is done initializing, reduce the FC gain to 0 (I think it will read 26 in the software - as low as it will go), and then perform your mechanical setup of centering servos, linkages etc.). This will take the FC gyros out of the loop and ensure the cyclic servos return to true center. (kind of like putting the Align 3G system in DIR mode for its setup.)

Steve

PM  EMAIL  GALLERY  Attn:RR
12-28-2010 01:25 AM  7 years agoPost 4
Rockohaulic

rrElite Veteran

Canyon Country, CA, USA, 3rd Rock from the Sun

My Posts: All  Forum  Topic

thanks guys

Saturday morning I flew my helicopter in my pajamas
How it got in my pajamas I'll never know

PM  EMAIL  GALLERY  Attn:RR
12-30-2010 04:25 PM  7 years agoPost 5
rcnut

rrElite Veteran

Rockford, Illinois

My Posts: All  Forum  Topic

Rock,

Your FC gain is controlling the servo throws, By setting the FC gain to zero, your servos will travel full throw (what ssmith512 said).

Team Miniature Aircraft
"I love the smell of Nitro in the morning!"
...Citizen 654!

PM  EMAIL  GALLERY  Attn:RR
WATCH
 1 page 1458 views TOPIC CLOSED
HomeAircraftHelicopterFuel-Helicopters New or Limited ActivityNext D › Setting up Cyclic Servos for Flybarless - Throw & Centering
 Print TOPIC  Make Suggestion 

 2  Topic Subscribe

Tuesday, October 23 - 9:28 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