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Old 05-16-2009, 08:24 AM   #1
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Default Radio problems

OK so I have a normal 27MHz radio kit installed in my serpent 950R. when I test it before the engine has been started all the servos seem to repond ok. However once the engine is running they servos glitch and dont respond at all. No steering and the throttle returns to neutral but then has a mind of its own. could this be due to the chassis vibration, the reciever is wedged firmly between the top deck and the chassis plate so it would recieve alot of vibration. I have a 40Mhz I will try next week.
Do you guys have nay suggestions.
thanks
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Old 05-16-2009, 12:55 PM   #2
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OK so I have a normal 27MHz radio kit installed in my serpent 950R. when I test it before the engine has been started all the servos seem to repond ok. However once the engine is running they servos glitch and dont respond at all. No steering and the throttle returns to neutral but then has a mind of its own. could this be due to the chassis vibration, the reciever is wedged firmly between the top deck and the chassis plate so it would recieve alot of vibration. I have a 40Mhz I will try next week.
Do you guys have nay suggestions.
thanks
yes your reciever needs to have some cshion use double sided tape. also watch where your wires are if they are tight togeather this will cause glitching.
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Old 05-16-2009, 04:54 PM   #3
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I will try and add some padding to the receiver, if I can fit it in lol. Also all the servo wires and fail safe are all tied together with a zip tie, will have to find a way to separate them.
thanks for the input.
Rob
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Old 05-16-2009, 10:56 PM   #4
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OK so I have a normal 27MHz radio kit installed in my serpent 950R. when I test it before the engine has been started all the servos seem to repond ok. However once the engine is running they servos glitch and dont respond at all. No steering and the throttle returns to neutral but then has a mind of its own. could this be due to the chassis vibration, the reciever is wedged firmly between the top deck and the chassis plate so it would recieve alot of vibration. I have a 40Mhz I will try next week.
Do you guys have nay suggestions.
thanks
Not wanting to come off as a jerk of smart-ass...but for the love of God, I hope you are not using an AM radio on such a nice car like that. I mean, aside from the RTR, parking-lot bashers, you don't see AM radios that much. With most people going to the 2.4 radios, using a FM radion should not be such a hassle like it use to (finding an open freq)

I sure hope you have a failsafe on that car.

Ok....with that said, check your batteries of the radio and the reciever.
Also not a good idea to use metal servos, especially with an AM radio.

Rubbing metal create low frequency noise that can cause glitching. Some guys use the metal servos only on steering and plastic on throttle. Its a good idea, since the motor is giving off major vibrations. If that's all you have then make sure you'er using plastic servo horn. Make sure all your screws on chassis are on tighten down.

Hope that helps man.....get yourself a FM radio as soon as possible.

Last edited by Kyo83; 05-17-2009 at 12:10 AM.
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Old 05-17-2009, 04:23 AM   #5
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Not wanting to come off as a jerk of smart-ass...but for the love of God, I hope you are not using an AM radio on such a nice car like that. I mean, aside from the RTR, parking-lot bashers, you don't see AM radios that much. With most people going to the 2.4 radios, using a FM radion should not be such a hassle like it use to (finding an open freq)

I sure hope you have a failsafe on that car.

Ok....with that said, check your batteries of the radio and the reciever.
Also not a good idea to use metal servos, especially with an AM radio.

Rubbing metal create low frequency noise that can cause glitching. Some guys use the metal servos only on steering and plastic on throttle. Its a good idea, since the motor is giving off major vibrations. If that's all you have then make sure you'er using plastic servo horn. Make sure all your screws on chassis are on tighten down.

Hope that helps man.....get yourself a FM radio as soon as possible.

Yeh I know 27mhz is not a good idea unfortunately I have to commit to other things so I cannot afford one at the moment . That is the last thing on my list to purchase.
And yes Im defiantly using a fail safe lol and the servo horns are plastic. my only other alternative at the moment is my 40meg radio kit.
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Old 05-17-2009, 05:10 AM   #6
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Default Radio problems

I have seen this before, and we found out that either the clutch bell bearings were bad, or the end of the clutch bell was rubbing on the flywheel causing metal to metal contact. If it only happens while the engine is running, then try both of these areas. Change out the bearings, and make sure to shim the clutch bell correctly
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Old 05-18-2009, 01:50 PM   #7
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well decided to purchase 2.4Ghz system so went an got an Acoms Technisport 2.4GHZ which will do for now. Also found out the antenna can't come into to contact with metal or carbon...which is another thing I was doing.
Never had any of these problems running my 1/8 buggy, everything was packed into a reciever box ohh well I prefer onroad
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