RCU Forums - View Single Post - Single servo glitch with engine running
Old 08-27-2006, 03:00 PM
  #12  
Campgems
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Join Date: Feb 2006
Location: Arroyo Grande, CA
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Default RE: Single servo glitch with engine running

Jim, try pluging a different battery straight into the receiver and see how it goes. I know that makes it difficult to fly with, but It will eliminate a bunch of wiring issues as well as the battery.

Any chance of posting a photo of your equipment?

Why don't you just use some electrical tape to eliminate the wing wire contact. It's quick and easy to remove if not needed. If it proves out that the wires are the source, then you can make a more attractive final fix. Another thing would be to use some bare wire and wrap the junction of the two wires. This will provide a semi permanate contact for testing. If it is the wires, it is the make and break of the contact between them. Either insulation or shorting will eliminate the make and break.

Another trouble shooting technique would be to induce viberation to the individual components. This is a bench test, with the motor not running. Use a wood pencil with a good ereaser on it and firmly tap each component while both the plane and transmitter are on and the servos locked. tap in as many directions as posible, X,Y,Z axis. Firm taps and several of them. Hit each servo, the receiver and the battery, watching for glitches. Now try wiggling wires at each servo and at each plug, as well as the battery and switch wiring. You may also try using a small screwdriver and shorting between the wing wires on the bench.

If the problem is related to a narrow range if throtle, it would indicat that there is a contact area that is in symphtectic viberation with the engine speed. This could be a broken wire, a bad crip on a wire, a cold solder joint in the electronics, etc. As all, or most of the servos seem to be glitching, and you have replaced receivers and changed frequencies, I would guess at this point that the problem is power related.

Keep us informed.

Don

PS, one more though, do you have a servo wiper that is going out due to vibration? Can you replace servos one at a time?