Alt-BEAM Archive
Message #04406
To: beam@sgiblab.sgi.com
From: Richard Piotter richfile@rconnect.com
Date: Fri, 11 Jun 1999 07:30:37 -0500
Subject: [alt-beam] Re: SERVO troubles
It could likely be a short in the H-Bridge. If the two wires to the
motor short together, the motor's physical resistance increases.
SG wrote:
>
> ok, would i offend anyone if i just came out and said that i found servos
> down right ugly? Especially when compared to the walkers using those lens
> motor jobs, i just don't think the servo "looks" right, but anyways...
>
> got the servo modified and even got so far today as to hook an H-Bridge
> circut (THANKS IAN!) up to test and it werked really good, took circut off
> to "PLASTI-DIP" the thing (circut .. not the servo) so there would be no
> shorts...
> later noticed resitance when i turn the shaft on this particular servo was
> really really strong, i hooked it up again and it didn't werk.. tested
> the h-bridge on my other servo.. it werked fine...
> whys the durn thang busted? thats $10 ya know! did i set the thing down
> too close to my Soldering iron?
> shaft WILL turn,(by hand) but it is way to strong.
> I know that someone's web page says "even the best of us burn out a motor
> once in a while" but how'd i do it with it just sittin there... pretty
> sure circut didn't fry it cause it werked ok on other motor.
> next question... are burned out servos any use? pull motor out and slap a
> pager motor in there? I dunno.
> just a 1/12 hr drive to the nearest servo buying place. thats why i'm griped.
> -Sparky
--
Richard Piotter
richfile@rconnect.com
The Richfiles Robotics & TI web page:
http://richfiles.calc.org
For the BEAM Robotics list:
BEAM Robotics Tek FAQ
http://people.ne.mediaone.net/bushbo/beam/FAQ.html
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