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Ikarus › Eco 8 Interference?????
05-07-2005 08:55 AM  12 years agoPost 1
Hobbywood

rrApprentice

Kerikeri Northland New Zealand

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Help!!!
If I do a tight pylon style turn so the rotor disk of the heli are facing me I get a great big Glitch. I've experimented with flat turns at a distance and there is no glitch. I've got the carbon blades from Ikarus. Could they be blanking the signal?

Eco 8, Carbon frames and blades, Axi 2214/12 motor, Jeti ESC, 8 3300gp cells. GWS Rx and servos with the pg03 gyro.

The heli is a gem to fly but I hate the glitch, any ideas???

electric chopper nut (bit mad actually)

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05-07-2005 09:53 AM  12 years agoPost 2
nivlek

rrProfessor

Norfolk England

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It's possibly because when you turn tightly your drawing more power from your pack . This could be causing more interference because of a higher current flowing if the motor is loading up more , or if the bec can't deliver enough current the supply voltage to you receiver and servos may be dropping .

At the end of the day , it gets dark .

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05-07-2005 10:04 PM  12 years agoPost 3
Hobbywood

rrApprentice

Kerikeri Northland New Zealand

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Interference

Thanks Nivlek,

I'll try the heli with a small Rx battery pack and disconnect the Bec. Thanks for the suggestion.

electric chopper nut (bit mad actually)

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05-09-2005 01:32 PM  12 years agoPost 4
zapa

rrNovice

Prague, Czech Republic, Europe

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antena

I don't share the opinion with BEC. The voltage from BEC can't drop below the level - that's the purpose and the only function of BEC. It will cut off the engine, not receiver supply !!

The source of glitch is poor receiver or bad location of the aerial (95%) - Try to experiment with antena location and you will see.

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05-09-2005 01:43 PM  12 years agoPost 5
nivlek

rrProfessor

Norfolk England

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You misunderstood what I meant . If the servos are drawing too much current during a manouver , the voltage could drop if the bec can't supply enough current .

At the end of the day , it gets dark .

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05-09-2005 03:11 PM  12 years agoPost 6
zapa

rrNovice

Prague, Czech Republic, Europe

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BEC

Sorry, I really don't understand well ) - I am using Schulze 45 He with 3A BEC - 3 Amps should be standard on this size. I just don't trust that explanation that's all.

I have see a static interference, interference from a metal contacts, interference from a servo motor, interference between a ESC-RX, but never heard about a glitch from BEC undervoltage )

Anyway I could offer you a solution. There is a simple handy tool from a bigger helis - voltage monitor such as Schulce Blinki - it detect an RX dropouts as well as minimum voltage. It has just a few gramms - it could be enough to connect it to the free channel, fly a tight turn ... and read number of dropouts as well as a "low peak" in on-board voltage.

... at least it could prove what's the problem ;o)

Best Regards
Pavel

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05-10-2005 10:42 PM  12 years agoPost 7
Hobbywood

rrApprentice

Kerikeri Northland New Zealand

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inteference

All the input is useful,

Having flown this heli alot I don't know what it is. If I put alot of input to the model while upright there is no glitch. It is only when the rotor disk is facing me. I can put all sorts of load onto the servos at other times. Very strange. More experiments required.

electric chopper nut (bit mad actually)

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05-11-2005 02:03 AM  12 years agoPost 8
Rob_T

rrElite Veteran

..

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CF does horrible things to radio installations, but I would think that there is enough space between the rotor blades that the signal would get through. I wonder if it isn't the CF in your frame, or your tail boom thats blocking the signal.

First thing I would try is relocating the receiver antenna. If practical try to get it as far away from the frame, skids and boom as possible (not an easy request I know!)

Other thoughts are do you stil get the problem if you strap on a set of wood blades? Does the glitch happen at a different part of the turn if you turn the other way? (that might eliminate or prove any connection with the BEC. If the glitch still happens at the same point in the turn it might be an issue with the BEC not supplying the current demanded by the servos).

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05-11-2005 09:02 PM  12 years agoPost 9
windyone

rrApprentice

York, England

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Hobbywood

I have experienced exactly the same !. When doing a tight turn with the rotor disc facing me I always had a glitch. I have a great deal of carbon and I had to be extremely careful to route the aerial well away from any of it. You cannot strap it anywhere near carbon !.

Mick

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05-12-2005 08:30 PM  12 years agoPost 10
NYAmpDude

rrNovice

Babylon New York

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Hey All

Two ECO's in my fleet, but in general all glitching can be solved by
doing two things.
1. Cut the Speed control wires to as short as possible, no more then
1 inch from the PCB. This will require placement of the speed
controller to just in front of the motor ala Mikado Logo.
Also requires the receiver to be moved to the top of the frame
behind the rotor mast and anti rotation pin holder.
This keep all that DAM FREAKIN NASTY; high rise time switching
noise away from your RF gear, and to a minimum.

2. Run antenna from rear of plastic skids to bottom of tail fin. Use
a rubber band somewhere to keep tension.

I can almost garantee this will solve your problems.

Best Regards
Barry

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05-15-2005 05:50 AM  12 years agoPost 11
Hobbywood

rrApprentice

Kerikeri Northland New Zealand

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Interference

Experiments at an end for now, waiting for a new ESC. DON'T PLUG IN WITH REVERSE POLARITY. oooooopssss. Lots of smoke and no flight.

Rx on top of the frame at the rear, aerial down to skid and along a straw. I'll try it along to the tailplane when my new ESC arrives.

cheers chaps and happy flying, not frying

electric chopper nut (bit mad actually)

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05-18-2005 10:57 PM  12 years agoPost 12
Bell Bloke

rrKey Veteran

UK

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Hi guys, I would put money on this one! Do you have a ferrite ring and a noise filter circuit on your speed controller output wire? If you don't then that is 100% your problem. When I first started on electric helis no one told me about ferrite rings etc and I actually had some very strange glitching. This tended to happen only under certain circumstances and only when all of these variables were present.
A. Flying towards me
B. Throttling Back on the power
C. More than 50 meters away
D. Model approaching at low level
Because these variables were not always present it took me 8 months to realise I even had a problem. I had had some strange things happen but just put it down to turbulance!
Then one day I flew at a new site and all of A,B,C,D came into play and down it came. After a rebuild I flew the same site and it crashed again in the same place the same way. Then I knew I had a problem.
Full and variable power ground range testing (with no blades) then reveiled just how bad the problem had been. I'm amazed the receiver even worked at all. But once I added the filter and ferrite ring the full range was restored. Let me know how you get on. All the best, Bell Bloke.

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05-19-2005 09:42 PM  12 years agoPost 13
Hobbywood

rrApprentice

Kerikeri Northland New Zealand

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ferrite rings

Cheers bell bloke,

Could you post a photo so that I can see how you have done this?
Thanks

electric chopper nut (bit mad actually)

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05-19-2005 10:23 PM  12 years agoPost 14
Bell Bloke

rrKey Veteran

UK

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Will do!
I also have a part number for the Futaba filter.
The bar code is: 5028967018222
The part number is: P-AB0104
This has a ferrite ring built into the lead and a small filter circuit it retails at about $10. The best thing I ever bought! Also when you do that variable power range check you will be staggered at the results. As for installation, it's really simple. Just plug the speed controller cable into the filter and the filter into the receiver. If you think of your speed controller as a massivley noisey power supply. Basically the noise travels down the control wire and right into your reciever! This is very bad!
The filter just gets in the way and runs in between the two. This filters out all of that noise. Lovely!
Although why they don't build in this circuit into the controller I will never know, Cheapskates!!
All the Best, Bell Bloke.

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05-19-2005 10:40 PM  12 years agoPost 15
NYAmpDude

rrNovice

Babylon New York

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Folks,

The idea behind the ferrite ring, is to prevent the high freq. noise
create by the motor controller and radiated by the motor control
wires from being conducted down the wire and into the receiver.
As this is the case the best place for the ring in most installs is
some where mid way down the wire to the receiver.

The ring is somewhat effective, BUT cutting the motor control
wires ( which are the source of most of this noise ) as short as possible
and placement of the controller as close to the motor as possible ( and away from all other electrical equipment) is a far better improvement.

Barry

The ground came up and hit me !!!

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06-12-2005 11:16 PM  12 years agoPost 16
Russ Delaney

rrApprentice

Ashbocking, Suffolk, UK

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Interference

I would change that GWS reciever ASAP
I had loads of the same problem, even lost a model!!

Changed to jr R700

Never had any more problems.
I had a similar post here on RR lots of Eco fliers had the same trouble with GWS.

Russ

Team Quick UK Pilot 20

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06-14-2005 09:11 AM  12 years agoPost 17
Hobbywood

rrApprentice

Kerikeri Northland New Zealand

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I'll do that, thanks. Got one I could stip from another model.

Cheers

electric chopper nut (bit mad actually)

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