180 deg servo?

I thought they all go at least 180 deg..?

Nope, some do only 80 deg, and almost none are advertised as 180 deg. What
you can achieve by controlling the servo with a microcontroller is another
thing, which is why I ask :)

regards,

--
Knut Eldhuset

"Linux is only free if your time has no value."
    -Jamie Zawinski, founder of Mozilla.org

Knut Eldhuset wrote:


No, he's right. Most of the servos I've used (Hitec, Futaba, even Ace)
can easily rotate 180 degrees, and these are the cheap ones, between
$10-$15. Of course, this is the maximum range. The functional range
depends on the controller, which typically limit rotation to 90 degrees.

Chris

Thanks for that info. I'll try using one of my existing servos then. I
have not tried hooking it up to the micro yet because of the small range I
got with my RC gear.

regards,

--
Knut Eldhuset

"Linux is only free if your time has no value."
    -Jamie Zawinski, founder of Mozilla.org

I've done some experiments with an hitec hs-325hb ($14) and I got 180
degrees, no problems.

Padu

Often you will be restricted to 180 degrees when you hook it up to an
R/C receiver, but when it's hooked up to a microcontroller there
shouldn't be any limits short of the potentiometer's ones.

On Mon, 21 Mar 2005 08:11:07 +0000 (UTC), Knut Eldhuset


I get about 190 deg rotation from a standard tower hobbies servo.
My servo controller can operate it from hard stop to hard stop.

Knut Eldhuset wrote:

money).

I've used 6-8 different servos from Cirrus, Futaba, Hitec, etc, and
they all rotate over 180 deg. However, it seems that most R/C receivers
will limit the rotation to only 90 deg or so. Also, if you use a servo
controller chip to run the servos over the full 180 deg range, you'll
find the angle-vs-pulsewidth relationship is not quite linear. You
normally get 90 deg rotation with pulses over 1000-2000 usec, but
typically the full 180 deg comes over a pulsewidth range of about
700-2300 usec [rather than 500-2500 usec]. This varies from servo to
servo.


- dan michaels
www.oricomtech.com
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