Signal Interference between Servos

[RCSubGuy]

You know.. I've been having the same issue here near my home with erratic signal reception. Been a couple of boats I've had this issue with now.

Is there a module or sensor out there that can read background noise on certain frequencies so we can check prior to running our boats?


Bob

[cliffhanger67]

Bought the Ferrite ring from Amazon ordered as follows: "Uxcell a 12122000u x 0098 10 pc 18 mm x 5mm yellow white Iron Core Power". I.D. is 8mm to allow entry of the terminals with 3 coiled loops. Well, I do not need 10 pieces. I can spare a few. Contact me.
As for your 2.4 Ghz conversion, it's not for underwater use, right?
I am beginning to get signal issues now running my boats in usual spots I have been using. It seems the frequencies we use are not "clean" anymore. Boat has erratic signal reception.

[QuarterMaster]

I tried it. It did not help. The Ferrite Ring fixed it. Thank you very much to your suggestion. I appreciate every one's support.

Awesomesauce! Got a Part number/Source for that ferrite ring? Want it for the "tips-n-tricks toolbox".

FWIW, after final assembly and functional testing , I had so many radio issues, I decided to abandon the old "Sub Tech Nautical Commander" and I am now going with the spare RX I had for my Robbe F14. I had converted it to 2.4Ghz, but now I actually modified the radio to use both frequencies by a flip of the switch.

Soon I will have a sequel video coming out to my original 2.4Ghz conversion sowing that (Graupner Robbe NAVY F-14 TX 2.4ghz conversion using Corona 2.4Ghz DIY Module & RX (DSSS) )

"Sub" Ed

[cliffhanger67]

I'm going to go out on a limb here and suggest it may be caused by power spikes w/the ADF2 on that particular channel.

When the ADF2 is actively working it may be causing "spiking" on the system as it needs power, as the servo it's connected to adds to it as well. Thereby creating more load on THAT channel.
So a "Glitch Buster" might be the answer. They act as "storage" to even out the voltage throughout the VCC distributed by the RCVR as different components are being utilized.

I used them on ALL my old 75Mhz Rcver's

You can build it yourself for pennies:
How to Make Your Own Rc Car Recever Glitch Buster for $1

Or purchase one:
Novak 5626 Glitch Buster Capacitor

I made my own for my Teskey PROTEUS WTC (WIP). Went with a 2200uf 6.3V Electrolytic Cap (Mfr P/N ECA-0JM222) after I found out what was actually being used in the NOVAK .

I plug it in the old RX Battery Port since I get power from my ESC's. If that's not available either any unused channel, OR piggy back it onto a servo connector.

Here it is in the closed Water Tight Compartment:









As you can see from this earlier picture of the WTC partially assembled, it is quite congested already in order to have all the functions I wanted.
With all that going on, a "Glitch Buster" was warranted.


The point being here it's a relatively inexpensive solution to try.

Give us feedback regardless if it helps if you do.

"Sub" Ed

I tried it. It did not help. The Ferrite Ring fixed it. Thank you very much to your suggestion. I appreciate every one's support.

[cliffhanger67]

I've got about twenty operational SD's -- most of them equipped with either APC or APC2. In air they all produce vibration induced flapping of the stern planes when the motor/LPB/servos are running. But, not to worry, the damping effect of the immersed system (SD within the submarine) pretty much negates the vibration (motor and servo operation) induced stern plane oscillations seen in air.

Stop sweating this stuff and get your model in the water and have fun.

David

Thanks David. My boat in question was really bad. Jitters on all servos and motor would come on and off with out any command. Boat had it's maiden run at Yorba Linda Regional Park pond two weeks ago.
Very satisfied now with the propulsion and diving systems.

[cliffhanger67]

Do you still have this issue Cliffhanger67? If you do, what have you tried? I had a similar issue on my Scorpion. It cleared away with the addition of a ferrite ring.

I installed a Ferrite Ring on the signal wire from the ESC. It worked. Calmed the system. Thank you all. It's just that this second boat which basically a copy of the first boat has this issue. tThe first boat did not need this Ferrite Ring. Anyway, I will leave this boat as it is until i need to Ferrite it.

[He Who Shall Not Be Named]

This is my assessment as well.

You can use some thick, double-sided foam tape to help isolate the ADF from the tray. Most pitch controllers are really sensitive to vibration.

Bob

I've got about twenty operational SD's -- most of them equipped with either APC or APC2. In air they all produce vibration induced flapping of the stern planes when the motor/LPB/servos are running. But, not to worry, the damping effect of the immersed system (SD within the submarine) pretty much negates the vibration (motor and servo operation) induced stern plane oscillations seen in air.

Stop sweating this stuff and get your model in the water and have fun.

David

[RCSubGuy]

Your ADF2 is picking up the vibrations produced by the motor. After reconnecting your ADF2 put the sub in some water and operate it. Many times being submerged in water , the water itself absorbs much of the vibrations and you will then be able to live with the minor fluttering that may remain

This is my assessment as well.

You can use some thick, double-sided foam tape to help isolate the ADF from the tray. Most pitch controllers are really sensitive to vibration.

Bob

[Pawly]

Do you still have this issue Cliffhanger67? If you do, what have you tried? I had a similar issue on my Scorpion. It cleared away with the addition of a ferrite ring.

[greenman407]

Your ADF2 is picking up the vibrations produced by the motor. After reconnecting your ADF2 put the sub in some water and operate it. Many times being submerged in water , the water itself absorbs much of the vibrations and you will then be able to live with the minor fluttering that may remain

[greenman407]

If you disconnect the ADF2 from your aft servo and reconnect the servo without using the ADF2 I think you will find that your fluttering, at least of the stern planes will go away

[trout]

Ed,
that is a great suggestion! I have wanted to try one, but seem to forget about them. Thank for the reminder!

[QuarterMaster]

I'm going to go out on a limb here and suggest it may be caused by power spikes w/the ADF2 on that particular channel.

When the ADF2 is actively working it may be causing "spiking" on the system as it needs power, as the servo it's connected to adds to it as well. Thereby creating more load on THAT channel.
So a "Glitch Buster" might be the answer. They act as "storage" to even out the voltage throughout the VCC distributed by the RCVR as different components are being utilized.

I used them on ALL my old 75Mhz Rcver's

You can build it yourself for pennies:
How to Make Your Own Rc Car Recever Glitch Buster for $1

Or purchase one:
Novak 5626 Glitch Buster Capacitor

I made my own for my Teskey PROTEUS WTC (WIP). Went with a 2200uf 6.3V Electrolytic Cap (Mfr P/N ECA-0JM222) after I found out what was actually being used in the NOVAK .

I plug it in the old RX Battery Port since I get power from my ESC's. If that's not available either any unused channel, OR piggy back it onto a servo connector.

Here it is in the closed Water Tight Compartment:









As you can see from this earlier picture of the WTC partially assembled, it is quite congested already in order to have all the functions I wanted.
With all that going on, a "Glitch Buster" was warranted.


The point being here it's a relatively inexpensive solution to try.

Give us feedback regardless if it helps if you do.

"Sub" Ed

[type7]

Have you tried plugging in a different servo? I have found that some brands seem to have issues. Might be tied to voltage from the BEC or servo linkage binding but for me, usually finding a different servo makes the fluttering go away.

[trout]

That question is right up there with the meaning of life! lol I am not sure why.