servos?

[guff20]

I just bought a new Duratrax axis buggy and am in the process of installing the electronics. I rigged up my battery two servos and revceiver to test the gear before installation. When i applied power to the circuit one of my servos started to hum. I bought a new tower hobbies high torque servo and used one of my old futabas. my reciever is a futaba as well. Tower hobbies claims that the servo is compatible with futaba gear. My part numbers are: reciever(fp-r102gr),futaba servo(fp-s148), tower hobbies servo(ts-65). Any suggestions? I think it's a bad servo but i will test it again this weekend on a brand new futaba system to verify my results. IF anyone knows something i don't it would be great if you could reply!Thanks!!

[NitroDrew]

It's not uncommon for servos to hum a little. Unless it's loud or smelling like it's burning ( :eek: )I wouldn't stress too much about it.

[Jwelch]

Well, is the servo centered??? Try fiddling with the trim knobs on your transmitter if the wheels are turned. Also, the humming noise may just be normal!

[guff20]

i finally took apart the servo after all my tests failed. Inside the servo, the gears looked like perfect circles WITH SMOOTH EDGES AND NO TEETH! Man!That wasn't cool! I learned my lesson no more cheapo servos. I am going with a genuine futaba with metal gears. I should have done that in the first place!

P.S.-You are totally correct. Some high torque servos will make a humming noise. I checked my bros out and his does this. Thanks for the info guys!!!