RunRyder RC
WATCH
 1 page 399 views POST REPLY
HomeAircraftHelicopter
e-
Align
T-REX 450 › Swash interaction on DX6
10-23-2009 10:32 PM  8 years agoPost 1
GREYEAGLE

rrElite Veteran

Flat Land's

My Posts: All  Forum  Topic

Re dialing and refurbishing a 450 back to spec, per factory measurements.

New mg digital servos have great centering, links are spec dead on, arm's 90'd out.

Seems like I'm chasing a bit of interaction on the 120 ccpm and I'm using the sub trim's remove it.

Is it common ? Or is their easy way ?? Tired of chasing around the menu tree's of this spectrum.

greyeagle

PM  EMAIL  GALLERY  Attn:RR  Quote
10-24-2009 01:17 AM  8 years agoPost 2
Abraxxas

rrNovice

Plover, WI

My Posts: All  Forum  Topic

I experienced the same thing when setting mine up on a 9303 2.4, similar programing I believe. Lots of adjusting one servo then having to re-tweak the other two, then move to one of the other servos and chase the circle around again until everything was right. Perhaps there is an easier way that I dont know about, but if it makes you feel any better I do the subtrim dance on the 120 too

Its 7:45am, everyone land so I can call in sick...

PM  EMAIL  GALLERY  Attn:RR  Quote
10-24-2009 02:34 AM  8 years agoPost 3
GREYEAGLE

rrElite Veteran

Flat Land's

My Posts: All  Forum  Topic

Thanx A Bunch !
Well at least I don't feel so exhausted then

Minute I think I got it - then I gotta go around again, and the last thing I want to due is spinning link's because I know their dead on.

I'm working out of one 70 page Align manual and one 90 page Spectrum manual- The menu tree's are UGLY to say the least.

Worst part is that some of the Alpha Numeric acronyms they use ---actually cause you to forget what the heck your trying to do and I keep loosing my place jumping from one programing tree into a sub part of another

Next up will be the throttle curves, pitch curves, and idle up's.

I'm definitely gonna strap this one on a ladder and plug it in from underneath the first time ! At least the cannon fodder will fly out above my head !!!!

greyeagle

PM  EMAIL  GALLERY  Attn:RR  Quote
10-24-2009 03:09 AM  8 years agoPost 4
Abraxxas

rrNovice

Plover, WI

My Posts: All  Forum  Topic

Right on I dont think you'll ever have all zero'd out subtrims, just plug 3 servos in and try to get the arms perfectly centered on all three... pick the closest spline to center and finish with subtrims, they're always a little different from each other, thats what subtrims are for

Its 7:45am, everyone land so I can call in sick...

PM  EMAIL  GALLERY  Attn:RR  Quote
10-24-2009 05:40 AM  8 years agoPost 5
dkshema

rrMaster

Cedar Rapids, IA

My Posts: All  Forum  Topic

DX6? As in the Halloween Orange and gray original DX6 that was based on the old JR 662 radio? The granpappy of all that's 2.4 GHz today?

I seem to recall that the original DX6 HAD CCPM interaction problems. It's been a few years, but I believe they ship out the Aux 1 (pitch channel output in a different "frame" than that of the aileron and elevator channels. There's a bit of lag between the two bits of data, and you're essentially screwed.

This might require a search here on RR that goes back a few years to verify.

-----

Subtrims would be used to get stuff centered at neutral, individual endpoint/travel adjustments would be used at the collective extremes to keep the swash level from end to end.

But I think channel 6 simply follows the other two, and lags behind a bit as it moves to a new position. This gives the interaction, and is noticeable as the servos are moving. Eventually they'd all reach the same position, however.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

PM  EMAIL  GALLERY  Attn:RR  Quote
10-24-2009 04:35 PM  8 years agoPost 6
MikeInMobile

rrElite Veteran

Mobile, Alabama

My Posts: All  Forum  Topic

Your so-called interaction is due to irregularities/differences in the actual servos .... no two servos have the exact same travel characteristics. Start with a zero subtrim with the servo arms at 90 degrees. Next, move the pitch to max, and adjust the high endpoints to achieve a level swash. Next, move the pitch to minimum and adjust the low endpoints to achieve a level swash. If the servos' travel are anywhere close to linear, this should fix the issues!

PM  EMAIL  GALLERY  Attn:RR  Quote
10-24-2009 06:23 PM  8 years agoPost 7
GREYEAGLE

rrElite Veteran

Flat Land's

My Posts: All  Forum  Topic

Thanx Mike and DK !!!
Dk you crack me up ! No soup for you ! Yes it's a Pumpkin ! Think thats old - I got radio's I have to take the manuals to the field just to jump between models and some old AM stuff that's just - " peachy" I'll just say hey - " that's cool" during the lag - " yes I definite noticed it and it drives me nut's " Thans for the warning !!!

Mike: Super Tip - I'll take heed to the great advice - and fall back to home plate and start over " !!! Heck what's another 8Hr's

greyeagle

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 1 page 399 views POST REPLY
HomeAircraftHelicopter
e-
Align
T-REX 450 › Swash interaction on DX6
 Print TOPIC  Make Suggestion 

 2  Topic Subscribe

Monday, July 23 - 3:01 pm - Copyright © 2000-2018 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online