NetNews Usenet Archive 1992 #23/NN_1992_23.iso/spool/rec/models/rc/4108

Internet Message Format | 1992-10-09 | 1.7 KB

Path: sparky!uunet!portal!cup.portal.com!sbixby
From: [e-mail] (Steven W Bixby)
Newsgroups: rec.models.rc
Subject: Re: Glider/Submarine
Message-ID: <[e-mail]>
Date: Thu,  8 Oct 92 10:41:47 PDT
Organization: The Portal System (TM)
Distribution: na
References:  <[e-mail]>
Lines: 27

<sad story 'bout swimming airplane deleted>

>It all still seems to work,  but for some reason, the auto-cutoff on the
>electric motor doesn't work.  I'm using the Futaba 4NBL-E radio with
>the built-in speed controller.  It's supposed to cut off the motor when
>the bat voltage gets low, but it doesn't do it anymore.  Any guesses?
>It's all dry now, and everything else seems to work ok.  Another
>funny thing is that the motor enable button doesn't work, either.
>The motor is not supposed to run until you press a button to enable
>it; it's a safety thing.  Now, it starts right up without pressing the
>button.  Thanks for any suggestions.

The first is related to the second.  I have one of these rx/esc units
also, and if the enable switch is pressed even when the cutoff has gone
off, the motor will run, until you release the switch.

I would suggest, if it hasn't dried out still, to replace the switch with
a new one.  Run a hair dryer on low temperature over all the components with
the cases off (servos, rx, battery) to remove any extra water.  Also, consider
spraying alcohol on the electronics (don't soak it, just enough to dampen it),
since alcohol asorbs water. Then hair-dryer it off.  Electronics should
come out quite ok.  The switch may be closed enough that the water can't
evaporate, and it's stayed short-circuited.

Again, it's easy enough to solder in a new switch.....

 -swb- (Steve Bixby - [e-mail])