Need 180degree micro servo
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I'm looking for a micro sized servo that has
180 deg (or close to it) of motion,
proportional control (not a stop to stop landing gear retractor), and
run on 5VDC (4.8).
I'd rather have more torque than speed but at this point I'm not going to
be too choosy.
Thanks,
Chris
[noparse][[/noparse]Non-text portions of this message have been removed]
180 deg (or close to it) of motion,
proportional control (not a stop to stop landing gear retractor), and
run on 5VDC (4.8).
I'd rather have more torque than speed but at this point I'm not going to
be too choosy.
Thanks,
Chris
[noparse][[/noparse]Non-text portions of this message have been removed]
Comments
> I'm looking for a micro sized servo that has 180 deg (or close
> to it) of motion, proportional control (not a stop to stop
> landing gear retractor), and run on 5VDC (4.8).
>
Christopher, I've never tested the notion, but it has always been my
assumption that "stop to stop" operation of servos offered as retractors was
in fact a function of the controller rather than the servo. I know the
servos I've bought in hobby shops are described as having variously 30
degrees or 60 degrees of motion, but in fact they provide the same 170 to
200 degrees of movement that I get from servos sold for robotics.
I can't swear to the "retractor" class of servos, but I'd expect it to be
the same with them. Hardly seems worth creating a custom internal design
when stop-to-stop is so easy to do with the controller.
If you really want small, try the Futaba S3103 -- but it does not have much
torque. 17 oz/in and 4.8V operation. Both are a design limitations accepted
to get very small size: .9"x.4"x.8". Looks like it's built for "park flyers"
and the like. They warn that trying to get more torque by using higher
voltages WILL shorten the life of this servo, despite my speculation
elsewhere about standard size servos. (I strongly suspect the gear train is
the weak link in this case. Ah... no pun intended.<g>)
I'm sure there are other similar servos around. I just had Futaba's link
handy. See their data on the S3103 at:
http://makeashorterlink.com/?P2BF11557
Gary
<cdundorf@j...> wrote:
> I'm looking for a micro sized servo that has
> 180 deg (or close to it) of motion,
Search for Cirrus CS-10 or CS-20. They're very small, but I don't know
of any in these sizes that with 180 degress of rotation. You should
also know that, due to the size of the motor (barely bigger than a
pea), they have a fairly short life. I ran a CS-10 to failure in about
36 continuous hours hours, spratically beating the wings of a tiny fairy.
Stephen Weller
American. Veteran. Patriot.