RunRyder RC
WATCH
 1 page 1762 views POST REPLY
HomeRC & PowerAircraftHelicopterRadio - Futaba FASST › FUTABA GV1 question
01-13-2010 01:19 AM  8 years agoPost 1
dRaptor

rrNovice

NY, Staten Island

My Posts: All  Forum  Topic

Hi Guys,

I finished building my Trex600 but I haven't been able to fly it because I cant setup the GV1. (my radio is 7C).
It looks like everything is reverse but I can't fix it. When the stick is at the bottom(radio)the ATVA100% at high the ATVB100%. The B/FD is at 100% at the bottom and 0% at high. I checked the direction of the servo and its correct. Can you guys help me?
Thx

PM  EMAIL  GALLERY  Attn:RR  Quote
01-13-2010 01:32 AM  8 years agoPost 2
FlaG8r

rrElite Veteran

Florida

My Posts: All  Forum  Topic

Go ahead and fly it without the gov. It's a good practice to do this to break in the engine and you won't be needing the gov initially.

Life is tough, it's tougher if you're stupid

PM  EMAIL  GALLERY  Attn:RR  Quote
01-13-2010 02:37 AM  8 years agoPost 3
Thomas L Erb

rrKey Veteran

Alliance ohio

My Posts: All  Forum  Topic

did you do your limit set (LMT page 45 of the manual) ? you will need to do this . Are you running a mixture servo? The ATVA and ATVB limits are for a mixture servo. This limit set will tell the gov the range and limits of your throttle servo.

Tom

Ps i agree with flaG8r that you should make sure you have throttle curves established and the motor broke in and mixtures set properly before gov should be used

PM  EMAIL  GALLERY  Attn:RR  Quote
01-13-2010 04:49 PM  8 years agoPost 4
JetFire

rrKey Veteran

The Golden STATE

My Posts: All  Forum  Topic

Could be a number of things. Start from the beginning and recheck the following:

First and foremost, make certain that you are electronically setup properly. Throttle channel receiver/channel 3 gov, The aux receiver/aux RPM gov, throttle servo/throttle gov.

Next, Program the appropriate gear ratio (GRT) that applies to your heli.

Insure you have taught the gov the throttle limits (Lmt)ie High/low/cut, as 'Thomas' already stated. Its imperative that you setup your endpoints because this step also acts as a servo reversing feature if your using a JR transmitter. This has to be done on the initial setup and or anytime you change servos or make any changes to the throttle link. Having said that, make sure you are mechanically correct before even getting started. You should also have a linear curve in norm mode on the transmitter with stick in lowest position for the gov to acknowledge the first step. You shouldn't get an error message on the last step. If so, make sure you engage throttle-cut while setting the last step otherwise the gov did not save your new settings.

In addition, also note that the GV-1 contains advance features that the average person doesn't need to mess with. I highly recommend that if you don't know what it is, its better if you don't alter any other settings. I brought this up because a number of locals that I've helped with GV-1 problems are caused by changes to settings they don't know nothing about. I'm not implying this is what you did, but if you recall changing anything else.. its a possibility this is where your problem lies.

Hope that helped


Trex700N Pro
DX8-2.4
Spartan/BL9088

-The ONLY way you fail is when you quit.-

PM  EMAIL  GALLERY  Attn:RR  Quote
01-13-2010 07:00 PM  8 years agoPost 5
Smok

rrApprentice

Antwerp, Belgium

My Posts: All  Forum  Topic

I was initially flying my heli without connecting the GV-1 at all,
so I could set up my the throttle curves in Normal, IdleUp1
and IdleUp2 - this way I could see any symptoms of the motor
bogging down due to too lean fuel mix (heat) or too rich mix.
Also this allows the governor to fallback to throttle curves
if it can not govern anymore for some reason...
IMHO, this is a must - even if one does not plan to fly
without the governor at all - what if it throws the magnet
or looses the sensor ?

Then I connected the GV-1 in between - it has the nice option
of being able to copy the servo limits just from the Rx signal
and apply the same limits to the throttle servo - no manual
tinkering with throttle ATV in the GV-1 setup needed.

Then you can link the GV speed selection to the IdleUp switch
and once you input the gear ratio, then you do not need
any tachometer but you just set the RPMs on the GV-1 itself.
So for me the price of GV-1 was still less than of another
governor plus a Tacho..

Also I have noticed that the GV-1 control loop is rather
relaxed - that allows to accumulate a bit of rotor energy
when unloading the rotor - it will speed-up a bit and then
it won't bog down for longer, when entering a harder manouver.

That nicely shows on the F3C champs videos on RR - on the dive
the rotor would speed-up a bit and carry more energy through
the manouver.

IMHO the GV-1 is somehow undeservedly underestimated by some...
(at least seen from reading the forums).

PM  EMAIL  Attn:RR  Quote
01-13-2010 07:04 PM  8 years agoPost 6
Smok

rrApprentice

Antwerp, Belgium

My Posts: All  Forum  Topic

Also I found some useful GV-1 info by Jason Krause at his site:

http://www.jkheli.com/gv1.htm

PM  EMAIL  Attn:RR  Quote
01-13-2010 09:10 PM  8 years agoPost 7
dRaptor

rrNovice

NY, Staten Island

My Posts: All  Forum  Topic

Thank you all for your help. I will try to make it work tonight.

PM  EMAIL  GALLERY  Attn:RR  Quote
01-14-2010 03:26 AM  8 years agoPost 8
dRaptor

rrNovice

NY, Staten Island

My Posts: All  Forum  Topic

It worked! One more thing, I setup my throttle curve for normal, Idle 1 and 2(My radio is a FUTABA 7C)but when I checked in the GV1 I can see the speed changing when I move the switch but the rs1 doesnt change to rs2 or rs3 it just stays in rs1. Do guys know why?

PM  EMAIL  GALLERY  Attn:RR  Quote
01-14-2010 06:15 AM  8 years agoPost 9
Dr.Ben

rrMaster

Richmond, VA, USA

My Posts: All  Forum  Topic

So you're saying the numbers on the rpm screen change to what you've set them to, but they're still within a given "S" range?

What rpm choices have you programmed in?

Ben Minor

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

PM  EMAIL  GALLERY  Attn:RR  Quote
01-14-2010 12:36 PM  8 years agoPost 10
dRaptor

rrNovice

NY, Staten Island

My Posts: All  Forum  Topic

"So you're saying the numbers on the rpm screen change to what you've set them to" Actually, I can see the rpm changing but I can't set them up to what I want. In my FUTABA 7C radio Governor menu I have:
67.5, 87.5 and 100.

PM  EMAIL  GALLERY  Attn:RR  Quote
01-14-2010 03:25 PM  8 years agoPost 11
JetFire

rrKey Veteran

The Golden STATE

My Posts: All  Forum  Topic

when I move the switch but the rs1 doesnt change to rs2 or rs3 it just stays in rs1. Do guys know why?
You have to assign the GV-1 to the 3-position switch for it to acknowledge and utilize all 3 modes ie. S1,S2,S3. Idealy, this would be your mode switch. The 7C allows you to customize different configurations. I have my gov assigned to the 3-position switch.
67.5, 87.5 and 100.
Change it to the following up>0%, CT>50%, DN>100%
You will have to use trims to adjust the mechanical throw when throttle cut is engaged.


Trex700N Pro
DX8-2.4
Spartan/BL9088

-The ONLY way you fail is when you quit.-

PM  EMAIL  GALLERY  Attn:RR  Quote
01-18-2010 08:54 PM  8 years agoPost 12
Smok

rrApprentice

Antwerp, Belgium

My Posts: All  Forum  Topic

Here is my HOWTO for Futaba 7c and GV-1 with fixed RPMs assigned
to the Normal, IdleUp1 and IdleUp2 conditions ( no governor on/off
due to lack of another free channel on the 7C ):

***
Before connecting the GV-1 at all, I connected the throttle servo
directly to the Rx, no GV-1 - and then I have set the ATV, direction,
throttle cut, and setup the TX Throttle curves to have
roughly the desired RPM set by throttle curves in all three IdleUps.

Then on my 7C I have channel 7 assigned to switch E (Idle-ups)
(in the TX PARAMETER menu ) and made it Reversed (Reverse menu).
Channel 7 End Points remain at default 100.

Next, without any changes in Throttle curves, throttle servo ATV etc.
I just plugged the GV-1 as below, then set the Throttle servo
limits ( "Lmt" GV-1 function ) and set-up the parameters as follows:

Here is my Rx to GV-1 and servo cabling:

The channel 7 on the Rx connects to the "AUX (rpm)" cable from GV-1,
while Rx channel 3 connects to "CH3 (THRO)" and the throttle servo
goes to the GV-1 THROTTLE socket. The "MIXTURE" and "AUX (on/off)"
GV-1 ports remain not connected (when I will move to my new 8FG,
I am going to assign another switch/channel to the "AUX (on/off)" port).

Next power-on the Tx and the heli Rx and click GV-1 FUNC+ button twice
and you should see the S1 rpm ( if your Tx idleup switch is in "Normal"
position ) and you can change it with " + DATA - " buttons.

Flip the E switch to IdleUp 1 or 2 and the GV-1 display
should change to S2 and S3, respectively. In each of these S1/2/3
modes - set the RPM with " + DATA - " buttons.

Click + FUNC until you see GRt and set the correct rotor gear ratio.

I did not touch any GV-1 options starting with "M" - as they refer
to the Mixture trim/mix, which I am not using at all.

Other settings on my GV-1 ( at this moment I do not remember
which I needed to change from default ) are as follows:

SWPt=ON
StSw=ON
SWCd=on
GvOf=Inh

I am too lazy ;-) at the moment to check what these settings are for
in the manual ( I have set this up months ago ), but with the above
I am getting the three fixed RPM speeds set on the GV-1
and assigned to the IdleUp switch on the Tx. In the "Normal"
mode the GV-1 remains off for the bottom 15% of the throttle range.
On IdleUp1 and IdleUp2 it remains on at all time.

Now, after all that I have three fixed RPM values ( with the bonus
of not having to to buy a tacho and have someone measure rpm for me )
on the IdleUp switch - and in case the sensor or magnet breaks,
I still have the manually set throttle curves, so my heli
hopefully will not explode from overspeeding if the GV-1 gives up.

Hope that helps,

Smok

PM  EMAIL  Attn:RR  Quote
WATCH
 1 page 1762 views POST REPLY
HomeRC & PowerAircraftHelicopterRadio - Futaba FASST › FUTABA GV1 question
 Print TOPIC  Make Suggestion 

 1  Topic Subscribe

Saturday, September 22 - 2:16 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