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HelicopterRadio - Futaba FASST › GV-1 Setup help *FIXED*
03-18-2009 02:20 AM  8 years agoPost 1
rotormonkey

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Ottawa, ON - Canada

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So I've finally gotten around to installing a GV-1 I've had kicking around since last summer. Trouble is it doesn't seem to be working. Here's what I've got for settings (at least the relevant ones I think):

I'm running this on a DX7 so the aux/on-off lead is unconnected, and I have the aux/rpm lead connected to aux2 on the receiver.

rS1: 1800
rS2: 1700
rS3: 2100
Grt: 8.67
SWPt: ON
STSW: OFF / ON above 20% throttle
SWCd: shows it's working
GvOF: INH
B/FS: ACT
Sen: 97% when magnet is rotated over the sensor

So here's what I did to confirm that it DEFINITELY isn't working.

Set up on curves first so that normal mode is about 1700 rpm, and both idle1 and idle2 spin at about 1950rpm - got this with a tach. The curves in both modes are exactly the same. Now with the gov "working" I flip the switch from normal to idle1, and clearly hear the headspeed go UP. Switch between idleup modes, and no change in HS according to the tach.

Now here's where it gets a little weird... If I fly around in normal mode, when I come back down, the MAX menu shows 0 rpms when I come down. If I fly around in either idle up mode, I come back down, and it appears to give an accurate reading of whatever the max RPMS were during the flight.

Everything appears to be working just fine with the exception of the governER actually governING anything.

Is there some setting I've missed somewhere? Anybody have any idea wtf is going on?

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03-18-2009 03:20 AM  8 years agoPost 2
BlakeMcBrayer

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Georgetown, Ky

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aux/on-off lead is unconnected
I'm pretty certain that is the issue. Even though it shows that Switch position is "ON", it won't engage without an actual signal from the RX.

It has been several years ago, but I ran into a similar situation. We solved it by using a JR channel expander to make it work. You would put a Y cable into Aux2 on your Rx. Connect the Expander to one side of the Y and your RPM select to the other side of it.

You would program the expander to kick the on/off lead to "on" in idle 1 or 2. Then set your RS2 & 3 as normal. RS1 would have to be turned all of the way down until it shows off.

It's easy to do, but wrapping your head around how the expander works can be a pain. If you go this way, let me know. Heck, if you even need to call for some assistance, I'd be game.

Blake McBrayer
Fromeco Factory Rep
Fromeco Factory Dealer

Don't come off the throttle untill you see your GOD!

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03-18-2009 03:44 AM  8 years agoPost 3
TOSH

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UK.Peterborough

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Going back in time here but doesn`t one lead plug in the trottle channel and one in aux2?

Flybars. Who needs `em.

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03-18-2009 03:55 AM  8 years agoPost 4
rotormonkey

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Ottawa, ON - Canada

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Blake, sounds like a reasonable explanation. I suppose I could disconnect the aux/rpm, and connect the aux/on-off instead. Set to a static RPM, and see if that works to test this theory?

I've never heard of these channel expanders. Any links you could provide?

Tosh: Yeah, throttle servo plugs into the gov, and gov plugs into throttle channel of the receiver. The gov has 3 leads coming from it:

1: Throttle
2: Aux on/off
3: Aux RPM

Since I only have a 7 channel radio I can't use them all. I was told that I could just connect the Aux RPM lead, and I should be good, but apparently that's not correct?

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03-18-2009 04:48 AM  8 years agoPost 5
rotormonkey

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Ottawa, ON - Canada

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Blake: I just screwed around with it a little. I connected the on/off instead of the rpm lead just to see how the gov would see things. Looks like if I leave aux2 connected to the idle up switch in my radio, the gov reads normal mode as OFF, and either idle up as ON.

So if your theory holds true (hopefully it does) this can probably be solved with a simple Y cable!

Unfortunately I won't get to test it until the weekend now, but a good suggestion - thanks!

Any others are welcome in the meantime.

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03-18-2009 04:50 AM  8 years agoPost 6
heli_n00bi3

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Fairfield, CA

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It will work fine with the aux on/off lead disconnected and only the rpm lead connected provided you have StSw enabled - I run this setup myself with a DX7 and an Ar7000. Do you have aux2 slaved to flight mode in the dx7 setup? when you change your idle up modes (with the heli turned off, course ), can you see it change modes on the gv-1 display?

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03-18-2009 05:02 AM  8 years agoPost 7
rotormonkey

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Ottawa, ON - Canada

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Yup.

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03-18-2009 06:17 AM  8 years agoPost 8
Blade_Master1

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Canada

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03-18-2009 11:23 AM  8 years agoPost 9
TOSH

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UK.Peterborough

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rotormonkey
Sorry buddy, thought one of those three leads was for a mixture control. Like l said, it`s been a long time.

Flybars. Who needs `em.

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03-18-2009 12:23 PM  8 years agoPost 10
rotormonkey

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Ottawa, ON - Canada

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Tosh, actually you're right. The on/off lead doubles as a mixture trim I think. Since I'm not using a mixture servo though, I haven't really paid much attention to the mixture settings.

BM: Yeah, I went looking for those videos when I had trouble. My set up is pretty much exactly what Finless did with a couple minor differences which shouldn't affect anything. No dice. In fact he recommended leaving the on/off switch unconnected as well. But since nothing seems to be working right now, I'm pretty well willing to give anything a try.

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03-19-2009 03:23 AM  8 years agoPost 11
heli_n00bi3

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Fairfield, CA

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Sorry if this is a stupid question: Did you calibrate the high,idle and low points on the gv-1?

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03-19-2009 12:22 PM  8 years agoPost 12
rotormonkey

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Ottawa, ON - Canada

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No question is a stupid question. But yes I did. Even if I hadn't the gov should still be doing something.

Anyway, I've got a Y cable now, and connected both on/off and rpm leads from the gov, so hopefully that'll fix it. I'll test this weekend. Otherwise the dude I bought it from has one on his ship as well, so I'll copy all his settings and see if there's anything different. If not, we'll just try swapping his *currently* working GV-1 for mine, and see what happens.

I'll let y'all know what the problem was if I find it.

Thanks again to all who've replied.

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03-19-2009 05:55 PM  8 years agoPost 13
Roby

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Slovenija, Europe

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Manual saying that must be setup of: S1->S2->S3 (slow->medium->high) order.

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03-19-2009 10:22 PM  8 years agoPost 14
rotormonkey

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Ottawa, ON - Canada

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Yeah, in theory that's true. I'm sure it'd still work though. Anyway, I did have it low>med>high, but I changed it around just to prove to myself that it was indeed running on curves, and not the gov. I don't see the RPMs I set causing the gov to stop working.

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03-22-2009 12:17 AM  8 years agoPost 15
rotormonkey

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Ottawa, ON - Canada

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BLAKE: You hit the nail on the head buddy! I know many people have had success without connecting the on/off lead, but apparently that's what was causing me headaches.

I put it on a "Y" cable along with the RPM lead, so the gov is off in normal mode, and on in either idle up condition. Works like a champ now. Thank you all very much!

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03-22-2009 01:17 AM  8 years agoPost 16
Blade_Master1

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Canada

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I managed to do the same thing with out a Y harness
I just lowered the HS in Normal to 0 and the other positions still work

At least it works
Thanks for posting the fix

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03-22-2009 01:27 AM  8 years agoPost 17
rotormonkey

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Ottawa, ON - Canada

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The trick is that the on/off lead had to be connected. It wouldn't work otherwise. Even those finless vids say it should work fine without, but mine just wouldn't. Maybe it's a whacky firmware revision or something?

I've been trying to get it working for 3 weeks. Connecting on/off AND the RPM leads was the only thing that worked.

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03-22-2009 12:33 PM  8 years agoPost 18
Peefor

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Norfolk UK

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Not seen the videos, but I have never ever used the on/off lead. You must however be able to program an offset mix into the other lead. The mix, at minimum setting (-100%) is off, and max (+100%) is equal to the max headspeed required.

Whenever you need the GV-1 off, you just mix in the minimum amount (-100%). Any speed less than max is just a proportion of the (+100%)mix.

Pete

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