Servo chattering

[secrtwpn1]

The last few times I've fired up my Subdriver, the servos for the rudder and aft planes chatter. All batteries are freshly charged. What causes this and how can I fix it?

Thx
Farlan

[Ralph --- SSBN 598]

How close is the Rx to the speed controller?
Does the main battery wires that go to the main motor pass close to the Rx?
What type of seal is on the rudder control rod where it exits the cap?

You refer to the rudder servo.
Do any other servos chatter?

Several things can effect the servos.
It is a matter of checking and eliminating sources.

[secrtwpn1]

I will check those things. Thank you!

[secrtwpn1]

I don't believe its the cylinder seal as I have been using this cylinder for several months. I'm in the process of moving things around in the compartment. There is only so much room!

[Ralph --- SSBN 598]

Wait. . .? something is wrong if you have room! <G>

[thor]

What type of radio & receiver do you have in your boat?

[secrtwpn1]

Vex and the receiver i bought from you a few years go.. I just pulled them out of storage. I did have a Sombre 8 rx in it
and I think it died.....

[secrtwpn1]

So when i have the engine compartment out of the cylinder, it works fine. When I shove it all together, the servos start chattering. What parts should not be close to each other? I've never had this before......

[Ralph --- SSBN 598]

I would start with the easiest step.
Make sure the Tx is not sitting on the bench with the Rx.
I move my Tx about 15' away.
Antenna overlap does strangthing uphere in the desert.
Second I would change the servos for testing purposes.
Move the rudder in to the elevator socket and the elevator in to the rudder socket and see if there is still the chattering and make a note of which servo it is.
If the elevator servo now chatters, you know it is not the servo but something else
It's the channel.

[thor]

What frequency are you on, 75.XXX?

[secrtwpn1]

Yes, 75.......

[Ralph --- SSBN 598]

Farlan, is that channel 75 = 75.670 MHz
------------------
Other channels on 75 mhz.\ that we can use.
75.410 MHz --- Channel 61
75.430 MHz --- Channel 62
75.450 MHz --- Channel 63
75.470 MHz --- Channel 64
75.490 MHz --- Channel 65
75.510 MHz --- Channel 66
75.530 MHz --- Channel 67
75.550 MHz --- Channel 68
75.570 MHz --- Channel 69
75.590 MHz --- Channel 70
75.610 MHz --- Channel 71
75.630 MHz --- Channel 72
75.650 MHz --- Channel 73
75.670 MHz --- Channel 74
75.690 MHz --- Channel 75
75.710 MHz --- Channel 76
75.730 MHz --- Channel 77
75.750 MHz --- Channel 78
75.770 MHz --- Channel 79
75.790 MHz --- Channel 80
75.810 MHz --- Channel 81
75.830 MHz --- Channel 82
75.850 MHz --- Channel 83
75.870 MHz --- Channel 84
75.890 MHz --- Channel 85
75.910 MHz --- Channel 86
75.930 MHz --- Channel 87
75.950 MHz --- Channel 88
75.970 MHz --- Channel 89
75.990 MHz --- Channel 90

[secrtwpn1]

I'm sorry. I misunderstood you guys. I'm on Ch 89......

[Ralph --- SSBN 598]

It's okay, I am old and I may not say thing the way I mean them.
---------------------
A question.
Do you have any channels near to the center of the channel group?
Before we go down that road, have your tried the servo swap to see if it's the servo or something else?

[Ralph --- SSBN 598]

Another thought.
I know nothing about your radio.
Do it have the ability to increase or decrease the servo movement.

Sometmes when I adjust my servo through, I get it in a spot that does not seem to translate to the servo.
Some times dead spots of stalling mid movement.
If I increase the through percentage, these issues seem to go away.