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All Forums >> Radios, Batteries, Clubhouse and more >> RC Radios, Transmitters, Receivers, Servos, gyros >> very very strange radio problem
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very very strange radio problem - 12/28/2001 7:37:49 AM   
apache



Posts: 127
Joined: 12/23/2001
From: Jamaica, NY, USA
Status: offline 		My R30 was down for two weeks because I was waiting on sideframe from heliproz. My R30 was allready loose down, and the radio and battery are still assemble to the servo tray, the receiver and batt still rap tight and no wire's were disconnected. My sideframe came put it together with new clutch, bell, and starter shaft. Went outside for a test flight. I test the radio and all control move's, I tried over a hour to get the engine started but the clutch was very tight in the bell. eventually I got it started but then the radio was not responding I could not raise or lower the throttle. I swithch the radio off while the engine was running and then turn it back on and then it work, then I notice the aileron was on the left stick and the rudder was on the right stick. This is very strange because I did not remove any wire from the receiver. My batt are low but I never had this problem when my batt was low. The heli took some severe vibration when I was trying to start it because the clutch was lock to the bell. I am a newbe and would not want the control to switch up on me when I am off the ground. any help will be greatly appreciated. Thank You.
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very very strange radio problem - 12/28/2001 8:26:15 AM   
JohnVH



Posts: 14747
Joined: 12/5/2001
From: Lynden, WA, USA
Status: offline 		Maybe the RX took a good hit in the crash? maybe you have a bad bearing?

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very very strange radio problem - 12/28/2001 10:05:22 AM   
apache



Posts: 127
Joined: 12/23/2001
From: Jamaica, NY, USA
Status: offline 		but I diidn't crash. The clutch bolt came loose and was rubbing on top of the clutchbell and I also notice left and right side frame broke right by the engine mounts thats why I change the side frame.

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very very strange radio problem - 12/28/2001 10:52:17 AM   
JohnVH



Posts: 14747
Joined: 12/5/2001
From: Lynden, WA, USA
Status: offline 		Oh

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very very strange radio problem - 12/28/2001 7:54:49 PM   
lov2flyrc



Posts: 4576
Joined: 12/6/2001
From: New Smyrna Beach, FL, USA
Status: offline 		Is the radio PCM??? If you battery voltage drops below a certain voltage the radio goes into failsafe on PCM. It is possible that you are seeing a failsafe mode. Not sure about the aileron/rudder reversal? Pull the receiver and test the system away from the heli.
BTW...if your clutch is to tight for the engine to start that is a good clue something is not assembled correctly. Suggest you disassemble the clutch and resolve that issue as well.

Just my $.02
Todd

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very very strange radio problem - 12/28/2001 8:16:33 PM   
Nathan



Posts: 4643
Joined: 12/2/2001
From: Holland, MI, USA
Status: offline 		I am by no means a radio expert, but will think out loud for a minute.

My first thought was bad Rx due to a crash... the crash part has been ruled out, but I would still check the Rx and crystal.

I got the impression from your post that all control surfaces were functioning properly before you started the engine. Aileron was on the correct stick, throttle worked, etc. I also got the impression that only when the engine was running, did you start having problems. How did the range check come out with the engine off and engine running? Any changes to antenna placement since you made the changes? I've learned that antenna placement is critical to getting a clear signal. Make sure it's not overlapping itself, and is fully extended.

You make no mention of the radio you're using, so I'll make some assumptions. I assume no unusual abuse to the Tx has taken place... dropped, opened the casing, etc. I will also assume you have a module. Anyone in your club have an identical radio to you? Switch modules with that person, and see if that's the cause. Switch crystals with that person, and see if that's the cause. If not, I would recemmend calling Futaba (although, they'll just tell you to send it in for service).

Since the module is pretty much the key to the higher end radios, I think that's where I'd be looking. A PCM radio with interference will also cause your controls to go into failsafe mode. maybe that has something to do with it. I'm not sure if any of what I said covers the aileron and elevator switching places, but seems like the best place to start. Maybe the Modes were changed somehow?

I'm just thinking out loud, and telling you what I'd consider if I was in that situation. Hopefully someone with a little more Tx/Rx knowledge will come along with a definitive answer. Good luck

< Message edited by Plane Insane-RCU -- Dec 28 2001 3:19PM >

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very very strange radio problem - 12/29/2001 4:39:21 AM   
apache



Posts: 127
Joined: 12/23/2001
From: Jamaica, NY, USA
Status: offline 		the radio is pcm. the clutch is tight because I put two layer of paper behind the clutch liner to decrease the clutch to liner clearance. This is the second time I did this trick the first time is was very tight too but it sure didn't take me over a hour to get the engine started. Once the engine start its going to loose up and the next time I tried to start it, its going to be much easier. I got this trick off the enternet, but my main problem is my radio the batt was low according to the hobbico volt watch, but it was switching back and fourth to the last two yellow leds, it didn't reach the red led. The tx was on 9.4v, I test my radio at much less voltage than this. I am thinking that when I was trying to start the heli with the tight clutch they was a lot of vibration because the main blade wanted to turn with the start shaft, I had to apply alot of force to hold the main blade from turning, this was causing the heli to shake like when you cut off a chicken head. I fully charge my batt and the problem is still there. If it is possible that the shaking affected the rcceiver I would expect it to act differently like what it is doing now(rudder is on the right stick and the aileron is on the left stick) this is so strange. Many people say the futaba 6xhps cheap go with an 8or 9ch. I paid $319 for my system and that is a lot of money to me. I am still practicing on hovering and to have a major component like the my pcm reciver to start acting when I only bought it in sept 01 makes me just want to throw in the towel.

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very very strange radio problem - 12/29/2001 8:21:50 AM   
apache



Posts: 127
Joined: 12/23/2001
From: Jamaica, NY, USA
Status: offline 		I have a 6xhps which I bought in sept 01. My system have a crystal on the tx. , but how would this cause the aileron and rudder to switch places? My manual dont say any thing about the radio having the capability to switch around the aileron and rudder.

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       Post #: 8

radio problems - 12/29/2001 11:48:46 AM   
thecarpenter


 

Posts: 7
Joined: 12/19/2001
From: Lake Charles, LA,
Status: offline 		How about just keeping it simple. Reprogram the radio to the settings you want and take it slowly from there. The too tight clutch is not going to cause a radio problem.
Just some more thoughts
Greg

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       Post #: 9

radio trouble - 12/31/2001 12:34:19 AM   
fourstarforty


 

Posts: 40
Joined: 12/26/2001
From: ChilliwackBC, CANADA
Status: offline 		Hi i don't know if this will help u but i did have the same problem as you but with a hitec radio. Everthing was checked and double checked down to the servos nothing could fix the problem.I took off the back of the transmitter and sure enough a green wire had broke from it's solder joint from the aileron gimble.After i resoldered it back on everything has worked fine it's been a couple months now.I don't know why but with the wire off all controls are different the throttle was the rudder and vice versa.....good luck

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       Post #: 10

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All Forums >> Radios, Batteries, Clubhouse and more >> RC Radios, Transmitters, Receivers, Servos, gyros >> very very strange radio problem
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