General servo fault issue.

[Murray Matson]

Using DX61 and HXT900 servos on HK450. Servos are moving wildly randomly, causing crashes. Have replaced most parts ,except transmitter. Anyone had similar issue ???

 

[Lee]

Is it a Flybarred heli or FBL?
Do you have another RX to test the servos on?
Check the monitor screen in your DX6I, to make sure the stick inputs are smooth.
A good cheap investment, is a little servo tester, to check the servos separately from any other influence.

 

[Murray Matson]

Thank Lee. Its flybarred. Have used separate RX, same result.Changed servos. The only thing I haven't changed is the transmitter, but its not that old, which leaves me confused. Has anyone had issues with DX6is ?

 

[Lee]

Did you look at the Monitor screen?
Check if theres any twitching on the monitor from the individual channels.

 

[Murray Matson]

Monitor screen smooth travel on all 6 channels

 

[Lee]

Have you checked the voltage coming out if the ESC to the RX?

 

[Murray Matson]

Turnigy K Force brushless 40A - 5.3V

 

[Lee]

Then your last resort, is to try and find someone with another radio and see if that helps.
Do you have a Hobby shop nearby? I'm sure they'd hook it up to a shop radio and test it for you.