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servos jumping
Ok here we go again. I had the jitter problem 0n another plane not long ago. Turned out to either be metal to metal on the throttle or antenna inside fuse. Anyway I have another one jumping. Engine not running turn tx and rx on and they start jumping around badly. (4) JR 125mg on ailerons and elevator (1) JR126mg on rudder (1) Hitec 425 on throttle, battery 2700mah 6V , mpi switch. I checked everything for metal to metal and nothing, antenna outside of fuse. I have tried (2) switches (2) rx's, Ner 549-X, RS600 (2) batteries both 2700mah 6V. Any suggestions
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RE: servos jumping
Try a 4.8 volt pack that is fully charged, then step away from the aircraft with the transmitter in your hands... in other words, take the transmitter away from the aircraft or the receiver and see if they still jitter around with the lower voltage pack.
CGr. |
RE: servos jumping
Just put a 4.8 on quick gharge to top it off and I'll give it a try.
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RE: servos jumping
Check your Y harness and all connections.
Good luck, Darrolair |
RE: servos jumping
I checked that, I went threw each one trying to see if it was a bad servo or a bad ext.,or lose. I hope CG's suggestion works.
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RE: servos jumping
It's not the battery. Oh how I wish it was. I tried a 700mah 4.8V, but servos still jumping around.
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RE: servos jumping
Have your tried using a different receiver? It could be a problem with the transmitter as well. Since you are the same problem in different planes I think it's time to get the radio checked out. Honestly, I would send it in and have it serviced. With the glitches you are getting I wouldn't trust the radio with a plane in the air.
Ken |
RE: servos jumping
Sounds like a good idea. I'm flying 3 different planes on this radio right now. I did try 2 different receivers, but I think I'll send it in for a check up. I'm going to try another radio, just see if it will help. The other plane was metal to metal and as soon as I changed it, everything has been fine.
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RE: servos jumping
I had a servo jitter problem once. When I inspected my on board batery pack it had a cracked solder joint. I re-soldered it and the problem went away. Now I would rather just buy a new battery pack, but as Archie Bunker said, 'Those were the days."
(Did I spell solder properly? [sm=72_72.gif]) |
RE: servos jumping
If your on 72mhz do the servos jump around even with the Tx antenna extended?
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RE: servos jumping
Ok here's what I tried since Ken's suggestion. I changed radio and receiver out and still same problem.
gsoav8r Yes on the 72 mhz, and it does it with attena down and fully extended. I just tried another radio and same thing. I'm going to replace extentions one at a time and see where I get. |
RE: servos jumping
Try a different TX. Change RX crystal to match if necessary. Trying to eliminate TX as source of problem. Also could bypass A/C switch and plug battery direct to RX for testing.
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RE: servos jumping
Since your running a mix of servo brands...is it possible that one of the servo connections is reversed?
Not sure how that effects the rest of the gear. Cheers. |
RE: servos jumping
bruce88123
I tried that, switched it over to futaba and got same thing,servos still jumping around. gsoav8r Everything plugged in correctly, everything going in right direction. I just changed both 24" extentions from rudder and elevator, and still getting the jumps. I'm going to step back and wait for some more suggestions because I'm getting frustrated with it right now. |
RE: servos jumping
Is the other Tx/Rx that you tried on the same channel as your original setup? If so, try a Tx/Rx on a different channel to eliminate that one particular channel that may be getting interference from something in your area.
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RE: servos jumping
Is this happening at your home? You may be getting some type of broad frequency interference in your neighborhood. Take it out to the flying field and try it out there. Also try some different routing on you antennae.
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RE: servos jumping
r2champion
Tx/Rx are 2 different brands, Futaba Skyport 6, channel 50, and JR 8103,channel 33. brett65 Yes it's happening at home. All my other planes work properly with no jittering or jumping here at home. I have another plane which would jump around while running, but it did it here at home and at the field, after asking here, I found I had a z bend on the throttle (metal to metal). I did 2 things then, I changed the throttle connection, and removed the antenna from inside fuse, and it fixed it. I haven't had any other trouble from that plane since. I have some Hitec 5485's for another project and I may switch these out, and see what happens. Everything is new for this plane so really got me @^%$^#@$^[:@]. I hope crying isn't next.:( |
RE: servos jumping
ORIGINAL: ohnoucdat r2champion Tx/Rx are 2 different brands, Futaba Skyport 6, channel 50, and JR 8103,channel 33. brett65 Yes it's happening at home. All my other planes work properly with no jittering or jumping here at home. I have another plane which would jump around while running, but it did it here at home and at the field, after asking here, I found I had a z bend on the throttle (metal to metal). I did 2 things then, I changed the throttle connection, and removed the antenna from inside fuse, and it fixed it. I haven't had any other trouble from that plane since. I have some Hitec 5485's for another project and I may switch these out, and see what happens. Everything is new for this plane so really got me @^%$^#@$^[:@]. I hope crying isn't next.:( |
RE: servos jumping
Ok, you really should try and figure out what is going on here. First thing to do is pull all the radio gear out of the plane and set it up on the bench to see if it still does the same thing outside of the plane. If it doesn't then you know there is something about your installation in the plane that is causing. If it still does it then the issue is with the radio.
Ken |
RE: servos jumping
Im just going to throw this out there incase it helps any. You may have done this already though.
Unplugg all from the rx....then plug just a fresh battery in it and one servo...see if it happens...unlpug that servo and try another...one at a atime and see what the results are. MAYBE? [:o] Ilikebiplanes, Yup you spelled solder right! :D |
RE: servos jumping
Do you have your antenna fully extended?
You could be swamping the electronics on the plane with a high signal strength. I've seen this happen on a few planes. Once I put the antenna down, and moved away from the plane the movement stopped. Also if you are using digital servos, they tend to continually seek the center position, which may be causing what you are seeing. |
RE: servos jumping
Another thing to check...are you working under or around flourescent lights? In my shop I have overhead multi-tube flourescent lights and I have one plane that the servos chatter when those lights are turned on. Turn the lights off and the chatter goes away. It is the only receiver (all on 72 mghz) that does this. If I remove the plane from the shop, the servos will not chatter. I think it is the ballast in the flourescent lights that is putting out interference.
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RE: servos jumping
Newbie here...but...I'd try twisting all of the servo connection wires, too. One lead might be feeding back into the other ones. Can't hurt. RG
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RE: servos jumping
I'm going to do what Ken said. I'm going to remove everything and test it outside of plane. No digitals in plane, I've got a few planes with digitals and I'm used to the buzz sound digi's make sometimes. I am under flouresent lights, which sound similar to yours. I'll give it a try and move it outside. Heck I'm getting like Mickey, I'll try anything at this point.:eek: I even apoligized to the plane for calling her names
brett65 No stomping youtube videos here, crying is another story, cause if the wife finds out how much I have invested in this thing, I'm sure she gonna hurt me. On a lighter note how's the newest member of the family doing? You Getting any sleep:D |
RE: servos jumping
I get this on a home built plane. The rudder/tail dragger arrangement is somewhat like a chopper motorcycle front wheel. It like to flop to one side or the other when it's stationary. When it flops, it loads up the servo and it'll jitter. When I elevate the rear of the plane, the juttering stops. Is it possible one of your servos are being loaded up?
Jack |
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