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Eric Sophie wrote:
>
> The CD-Rom does not explaiin how to use this piece, but in an earlier post I
> wrote:
>
> Ok, this is called a "Slip Gear" or "Torque Gear" It is used to prevent over
> rotation by means of an internal clutch, the 2.5 - 5.0 NCM I belive means
> the range of operable force applied before the clutch disengages. Nano
> Centemeter of force.
(I think we established that this is Newton centimeters - a force of between
two and a half and five Newtons applied at a distance of one centimeter will
cause the gear to slip...or half that at 2cm, a third at 3cm and so on).
> They are really very handy if you can gear them for the proper application.
That's true - but I find they are almost always WAY too stiff for the
applications I have - by the time they've started to slip, the motor
has usually stalled - or ripped the robot to bits.
--
Steve Baker HomeEmail: <sjbaker1@airmail.net>
WorkEmail: <sjbaker@link.com>
HomePage : http://web2.airmail.net/sjbaker1
Projects : http://plib.sourceforge.net
http://tuxaqfh.sourceforge.net
http://tuxkart.sourceforge.net
http://prettypoly.sourceforge.net
http://freeglut.sourceforge.net
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Steve Baker wrote:
>
> I find they are almost always WAY too stiff for the
> applications I have - by the time they've started to slip, the motor
> has usually stalled - or ripped the robot to bits.
Hmm interesting. I only have one clutch gear (the one that came with RIS
1.5), and it is too *loose* to really be at all functional. I've also
read that the clutch force tends to drop in them the more they are used.
--
Regards
Micah J. Mabelitini - LUGNET #918
The University of Kentucky
SECC Middlesboro Academic Skills Resource Center
accutron@kih.net - http://www.users.kih.net/~micahx/
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Yes they do lose a little, I guess we always knew that would be the case, I
hate to see you not use the gear if it's to loose, reurn it for a new one if
you decide somthing really needs it. Also I consider this gear a "back-up"
in preventing mechanical failure, System controll being the supervisor (RXC)
Eric
In lugnet.robotics, Micah J. Mabelitini writes:
> Steve Baker wrote:
> >
> > I find they are almost always WAY too stiff for the
> > applications I have - by the time they've started to slip, the motor
> > has usually stalled - or ripped the robot to bits.
>
>
> Hmm interesting. I only have one clutch gear (the one that came with RIS
> 1.5), and it is too *loose* to really be at all functional. I've also
> read that the clutch force tends to drop in them the more they are used.
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Oh , right , Newtons , I was saying Nano centameters! thanks....I guess you
need a fair amount of gearing and distance to use these gears effectivly
along with opposing resistance, I love the way it works in the hand I
developed, infact in included a touch sensor in the thumb inorder to reverse
directions automatically, but the gear works so well, I often just rely on
timming, when using the Arm in an unofficial testing manner....Eric
In lugnet.robotics, sjbaker1@airmail.net writes:
> Eric Sophie wrote:
> >
> > The CD-Rom does not explaiin how to use this piece, but in an earlier post I
> > wrote:
> >
> > Ok, this is called a "Slip Gear" or "Torque Gear" It is used to prevent over
> > rotation by means of an internal clutch, the 2.5 - 5.0 NCM I belive means
> > the range of operable force applied before the clutch disengages. Nano
> > Centemeter of force.
>
> (I think we established that this is Newton centimeters - a force of between
> two and a half and five Newtons applied at a distance of one centimeter will
> cause the gear to slip...or half that at 2cm, a third at 3cm and so on).
>
> > They are really very handy if you can gear them for the proper application.
>
> That's true - but I find they are almost always WAY too stiff for the
> applications I have - by the time they've started to slip, the motor
> has usually stalled - or ripped the robot to bits.
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