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ProModeler Scorpion Power
HelicopterRadio - Servo - Gyro - Gov - Batt › GV-1 Not Responding in Idle Up 1-2
12-16-2003 02:40 PM  13 years agoPost 1
csims723

Heliman

LaGrange, GA

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Ok guys I am at a loss. I have installed my GV-1 on my heli and went thru all the set up three times. I am running a JR 8103 radio with a JR649 reciever. I have the GV1 Plugged into Aux. 3 for speed changes which uses the three position toggle. I have the on/off plugged into the gear on the reciever. I have checked the set up three times and must be missing something. The GV-1 holds great in normal mode. I have it set at 1550 rpms and it varies above and below that number about 20 rpms.Idle up 1(1650rpms) and Idle 2(1750 rpms) the GV-1 is deactivated for some reason.I have gone thru my radio several times to try to locate any hidden mixes or Expo's with no success. No matter what I try It doesn't activate. Do I need to set these throttle curves up the same as Normal? (0-25-50-75-100) or can I leave them in a V with out the GV-1 going crazy. I currently have the set 100-75-50-75-100.


Also is there a way to change the stick location where the GV-1 goes active? The manual says that it will activate at 15% throttle stick if the engine is turning 70% of the target speed. My roter is turning about 1600 rpms from half stick up to 3/4 stick where the GV-1 activates(kinda late in the stick if 15% stick and 70% target throttle holds true don't you think) and slows it down to 1550. The problem is if you try to decend from altitude the GV-1 turns off at 3/4 stick and drops the heli rapidly. I have the Throttle switch function turned on in the govenor to be able to slave the govenor to the throttle hold switch without any fancy mix or programing to get this result. Thanks for any help in this matter. Chris

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12-16-2003 02:51 PM  13 years agoPost 2
z11355

rrMaster

New England

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the short answer is that it should work.

verify that the GV1 cycles through
displaying S1, S2 and S3 as you
wrok the flight mode switch. Then
verify via the SwCd (?) screen that
it is ON in N (over 15%) and always
on in ID1 and ID2.

You might want to move the 8103
display to the servo outpout screen
and see what if anything is happening
to possibly prevent the GV1 from engaging.

Yes, you want simple V curves for ID1
and ID2. Do NOT program ID1 and 2
as 'normal'.

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12-16-2003 03:06 PM  13 years agoPost 3
csims723

Heliman

LaGrange, GA

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I tested the flight mode switch and I get the settings as I move the switch. I think I found out the problem with the STSW setting. I am running 30% nitro and my throttle curve is set very low to prevent over speeding in normal flight mode. Very low to be exact. My full throttle is set at 30% on the throttle curve. Guess I need to raise it alittle to turn on the govenor sooner and help it stay on when decending. Ill try the servo screen to see what going on. But I am still lost for why it doesn't turn on is idle up 1-2.

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12-16-2003 03:45 PM  13 years agoPost 4
z11355

rrMaster

New England

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on the 8103, Aux2 is the gyro channel.

Aux3 always tracks the flight mode.

As he indicated earlier, when he moves
the flight mode switch, the GV1 cycles
through S1, S2 and S3.

Something odd is going on.

I wonder if he has INV (the invert switch)
active or not. The INV switch is shared
between GEAR and INV so you only
get the one piece of functionality.

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12-16-2003 03:55 PM  13 years agoPost 5
csims723

Heliman

LaGrange, GA

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z11355
I considered this in set up. I made sure that the inverted is Inh. I checked again and it is INH> So this makes no since. I do have the speed setting in Aux 3 which is mapped to the mode switch. The Gov is recognizing the speeds in the correct order. Thanks for your help thus far Chris

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12-16-2003 04:00 PM  13 years agoPost 6
z11355

rrMaster

New England

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lets go back to basics instead of
advanced conspiracy theory


are you sure you calibrated the limits
correctly? Perhaps due to the depressed throttle curves, it never thinks
it should engage in ID1 and 2?

Just guessing.

Maybe quickly setup a dummy model
in the 8103, do a MDL RESET and
try playing w/ that.

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12-16-2003 04:09 PM  13 years agoPost 7
csims723

Heliman

LaGrange, GA

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When setting the throttle limits I did have to move the high curve point to 100% to get it to save and not give me an error. After it saved the limits I moved it back to my regular curve. What worries me about moving the throttle curve up to 100% all the time is at 3/4 stick this thing eating 30% nitro sings to a tune of 2300 rpms. I know that carbons are tough but I really think this is pushing it. I then increased the upper pitch to the max. to off set this and got it down to bout 2200. Still to high for my likings. I guess I got the one strong OS 32.

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12-16-2003 04:42 PM  13 years agoPost 8
csims723

Heliman

LaGrange, GA

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David,
What worries me about this is if I throw a magnet, or for some reason the GV-1 fails then you fall back on your curves. I realy don't wanna watch my heli's head explode at 100 ft because of over spooling when the GV-1 drops out. Chris

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12-16-2003 06:20 PM  13 years agoPost 9
fritzthecat

Key Veteran

Virginia Beach, VA

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Quote
--------------------------------------------------------------------------------

What worries me about moving the throttle curve up to 100% all the time is at 3/4 stick this thing eating 30% nitro sings to a tune of 2300 rpms.
--------------------------------------------------------------------------------

I'm sorry but I think you need to check your throttle servo setup because unless you run a 90 in your Venture there is no way to get 2300 rpm @ 30% throttle and 5 deg pitch.
At 100% throttle and +12 deg pitch no 30 or even 50 engine will run 2300 rpm even with more than 30% nitro. Something isn't right here, I suggest to re-setup the throttle / carb arm geometry for 90 deg angles and even ATV on both sides close to 100%.

Fritz


'Send Money, Women and Guns!'

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12-16-2003 06:48 PM  13 years agoPost 10
Mujenpwr

Senior Heliman

Mickleton, NJ

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I agree with Fritz. Make sure you setup your Throttle linkage/geometry. If you have your Throttle channel ATVs less than 80% on high or low you can get problems. Also both sides should be the same number. I set mine as close as I can to 100% ATV. If you go below 80% and you use your throttle trim in Normal mode to get you idle up high enough to idle you can shorten the lower range on the throttle channel. I found this out on my setup b/c I would get an error when setting the limits for the GV1. The limts being Idle, High, Stop(throttle cut). Again make sure you get your ATV on throttle as close to 100% as possible.

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12-17-2003 06:20 PM  13 years agoPost 11
csims723

Heliman

LaGrange, GA

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WellGuys I saw this with my own eyes. I read off the GV-1 max speed was 2249 on rotor. I verified this with a hand held tach. it read 2250. This was with 7 degree pitch. So what I did was use the GV-1 as a tach to set the curves to hold aprox 1550 rpms thru the full range of the curve. This is where I got the throttle curve so low.


Lets do the math. OS32 shx max rpm is 22,000. rpms
Venture CP gear ratio is 9.78
22,000 divided by 9.78 is 2249 rpms Max head speed
Chris.

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12-17-2003 06:43 PM  13 years agoPost 12
z11355

rrMaster

New England

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i recall a couple of years ago, a newbie
came out to the field w/ a similar
problem and no matter what we did
to jerk around w/ the pitch or throttle,
things wouldn't converge.

We swapped out his blades for a known
good set and POOF, problem solved.

put his blades back on and problem
reappeared.

His blades were aerodynamically
defective in some way.

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01-03-2004 01:44 PM  13 years agoPost 13
csims723

Heliman

LaGrange, GA

My Posts: All  Forum  Topic

Gv-1

Ok guy's just got my servo back and tried everyone's suggestions on my set up. My throttle curves are normal 0-30-50-80-100, Idle up 1 50-60-70-80-100, idle up 2 100-80-50-80-100. I have the Gv-1 plugged into a 649 reciever as follows: throttle into throttle,on/off into gear, speed settings into aux 3. I have checked to see that I have no mixing that effects the throttle in any speed set up on my radio and no Expo turned on. The throttle curves are all linear. I still can't get the GV-1 to stay on in idle up 1 or idle up 2. Any one have any other pointers? Thanks all for your help maybe I'll get this working right oneday. Chris

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01-03-2004 02:03 PM  13 years agoPost 14
z11355

rrMaster

New England

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did you go through the LMT (limit calibration) routine to tell the GV1
where idle, high and stop are (in a
mode where the throttle curve is
0-....100)

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01-03-2004 02:45 PM  13 years agoPost 15
KMorgan

Senior Heliman

Bonnie Scotland

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Chris

Scanning the above posts, I don't see any mention of the SwCd page on the GV1. When experimenting with the GV1, when I first got it, I found this the single most useful page.

As you play with the the throttle, switches and mixes on your Tx you can see whether the govn considers itself enabled (on) or disabled (off). This can be done on the bench. You can then try all sorts of things that you would not dare to with the engine running. You will soon find out when the GV1 is dropping off.

It was using this useful page that allowed me to come up with a very simple but effective setup on my 9CHP. I know you have a JR Tx, but I'm sure a short period of experimenting in the workshop should get everything sorted out.

Cheers

Keith

(edit: oops! sorry Z, you mentioned it)

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HelicopterRadio - Servo - Gyro - Gov - Batt › GV-1 Not Responding in Idle Up 1-2
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