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12-17-2018, 03:29 PM | #1 |
Quarry Creeper Join Date: Aug 2018 Location: Toronto, Canada
Posts: 430
| "Waterproof" Servo died from light water exposure...
I had a servo that saw no water submersion, but was rinsed with tap water and dried with compressed air, and it died pretty quicky (less then 6 runs). The sevo is advertised as waterproof but now I'm questioning whether I should apply additional waterproofing to future servos. Was it bad luck or should I waterproof everything regardless of them already being waterproof out of the factory? Sent from my SM-N950W using Tapatalk |
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12-17-2018, 03:39 PM | #2 |
I wanna be Dave Join Date: Jun 2016 Location: Austin
Posts: 6,010
| Re: "Waterproof" Servo died from light water exposure...
What make and model was the victim?
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12-17-2018, 04:55 PM | #3 |
I wanna be Dave Join Date: Oct 2012 Location: Medina
Posts: 2,263
| Re: "Waterproof" Servo died from light water exposure...
My guess would be that you blew water in while drying it with compressed air.
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12-17-2018, 05:49 PM | #4 |
RCC Addict Join Date: Feb 2016 Location: Santa Maria, CA
Posts: 1,751
| Re: "Waterproof" Servo died from light water exposure...
Did you open it up? There's a good chance its death may not have even been water related.
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12-17-2018, 07:29 PM | #5 |
I wanna be Dave Join Date: Jun 2016 Location: Austin
Posts: 6,010
| Re: "Waterproof" Servo died from light water exposure...
Hence my question as to the make and model...
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12-17-2018, 07:45 PM | #6 |
Rock Stacker Join Date: Aug 2012 Location: Jacksonville, FL
Posts: 76
| Re: "Waterproof" Servo died from light water exposure...
The term "waterproof" can mean anything. But most likely when you dried it using compressed air you blew water in past the grommet that makes it "waterproof". Sent from my SM-G965U using Tapatalk |
12-17-2018, 07:57 PM | #7 |
Quarry Creeper Join Date: Aug 2018 Location: Toronto, Canada
Posts: 430
| Re: "Waterproof" Servo died from light water exposure... |
12-17-2018, 08:00 PM | #8 | |
Quarry Creeper Join Date: Aug 2018 Location: Toronto, Canada
Posts: 430
| Re: "Waterproof" Servo died from light water exposure... Quote:
Before it started to go, it was hard steering left, enough to flex the front part of the truck. By the time I got it home to test, it would spin like at top speed and then flick wildly if I touched the potentiometer. Tried to save it with electrical contact cleaner and blown air but it was a no go. I have a "waterproof" Savox 1210, but I fear it would be just as unreliable unless I waterproof it myself. Sent from my SM-N950W using Tapatalk | |
12-17-2018, 08:03 PM | #9 | |
Quarry Creeper Join Date: Aug 2018 Location: Toronto, Canada
Posts: 430
| Re: "Waterproof" Servo died from light water exposure... Quote:
It was acting up before I got it wet (like the next day and after a long outing with it - not getting it wet that time), and blowing air into that part would have been very difficult seeing how that opening is quite trenched in the truck. Sent from my SM-N950W using Tapatalk | |
12-18-2018, 07:11 AM | #10 |
Rock Crawler Join Date: Nov 2014 Location: Dells
Posts: 697
| Re: "Waterproof" Servo died from light water exposure...
This is why you stick to reputable servo brands from actual hobby vendors. I've gotten multiple knockoff servos over the past few years. They can put whatever they want on the listing with no recourse. I had a knockoff bluebird servo from ebay not to long ago. It was advertised as brushless, It had a standard servo motor in it... I order all of my cheap powerhd servos through valuehobbies in IL RC Planes, Quadcopters, Cars and 3D Printer | Value Hobby |
12-18-2018, 07:34 AM | #11 |
RCC Addict Join Date: Sep 2010 Location: Apollo Pa
Posts: 1,650
| Re: "Waterproof" Servo died from light water exposure...
I run a couple DS3218 servos in my rigs and haven't had any trouble with them, that being said I know at $17-$18 from Amazon they are NOT top of the line I know they are better than the stock ones I replaced but I know they will eventually fail that's why there are spares on the shelf. You get what you pay for, bottom line, and as long as you know that starting out you won't be disappointed.
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12-18-2018, 07:54 AM | #12 | |
Pebble Pounder Join Date: Oct 2018 Location: northen ohio
Posts: 140
| Re: "Waterproof" Servo died from light water exposure...
if you have pure reactant grade alchool, you can dunk it in a cup. the water will will be displaced mostly with the alchool. (not a perfect expl, as they actualy combine, but it stops water damage.) Motor cleaner can do similar. just flood the motor and electronics. allow to dry on a top shelf of your home.(warmest area and also lowest humidity) sorry to hear, ive used air compressor to dry my rc's all the time, without damage. Quote:
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12-18-2018, 08:00 AM | #13 | ||
Quarry Creeper Join Date: Aug 2018 Location: Toronto, Canada
Posts: 430
| Re: "Waterproof" Servo died from light water exposure... Quote:
Quote:
I've got more on the way and will keep some spares. I will be adding grease, shoe goo, plastidip wherever possible to hopefully avoid this problem. I may also try the Savox servo just to see how long it lasts. Sent from my SM-N950W using Tapatalk | ||
12-18-2018, 08:01 AM | #14 |
Pebble Pounder Join Date: Oct 2018 Location: northen ohio
Posts: 140
| Re: "Waterproof" Servo died from light water exposure...
cheap servos and knock off's are all too common. i can only suggest, to take apart a new servo, and adjust as needed. (i do always do this after i got a BRAND NEW -powerHD servo that was exposed to extreme heat during shipment. all the grease they put on the gears was pooled into the top cover corner, with very little on gears- prior to disambley, i tested it and found it to be quite loud) i always test new items with my simple homemade usb servo tester that cost me a few bucks to make. |
12-18-2018, 08:10 AM | #15 |
Pebble Pounder Join Date: Oct 2018 Location: northen ohio
Posts: 140
| Re: "Waterproof" Servo died from light water exposure...
final info, if it can help. you MAY still be able to save this water logged servo. dry it best you can, soak motor in oil (bushing type oil) and then put in a oven at 170f for a few hours. put a wet paper towel under motor and elevate electronics. the excess oil will run out, and thin out as well. a few hours later, remove from oven and then using your compressor, blow out motor again while its still semi warm. (cleans remaining oil from motor comm) not many ovens go as low as 170f, but some do, and this is low enough to dry, but not damage plastic or electronics. |
12-18-2018, 08:53 AM | #16 | |
Quarry Creeper Join Date: Aug 2018 Location: Toronto, Canada
Posts: 430
| Re: "Waterproof" Servo died from light water exposure... Quote:
Sent from my SM-N950W using Tapatalk | |
12-18-2018, 09:02 AM | #17 |
Pebble Pounder Join Date: Oct 2018 Location: northen ohio
Posts: 140
| Re: "Waterproof" Servo died from light water exposure...
thats great, cheers on the refund.
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12-18-2018, 09:19 AM | #18 | |
RCC Addict Join Date: May 2015 Location: Price Twp.
Posts: 1,291
| Re: "Waterproof" Servo died from light water exposure... Quote:
You should take a little responsibility for this. Your actions of using compressed air to dry off a servo is the most likely reason for water entering the servo. Using compressed air, blows grease seals out, and will cause rubber o rings to expand as the air pushes water into the servo. That is really a bad habit that you will want to avoid in the future, if you want to have more reliable electronics. Hopefully a lesson learned. | |
12-18-2018, 09:31 AM | #19 | |
Quarry Creeper Join Date: Aug 2018 Location: Toronto, Canada
Posts: 430
| Re: "Waterproof" Servo died from light water exposure... Quote:
If it is the air causing the issue, then I will have to rethink using compressed air or perhaps be even more diligent when using it. I appreciate all the feedback and tips! I'm thankful this wasn't an expensive servo like I've seen some people in my group using! Sent from my SM-N950W using Tapatalk | |
12-18-2018, 09:34 AM | #20 | |
RCC Addict Join Date: May 2015 Location: Price Twp.
Posts: 1,291
| Re: "Waterproof" Servo died from light water exposure... Quote:
The other thing to remember about compressed air, and that depends on what you are using, is that air from a compressor as oil atomized in it. Of course that depends on your compressor. | |
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