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Ram Meenakshisundaram wrote:
> Isnt that the same as the white clutch gear. Here is a link to it:
> http://w3.one.net/~hughesj/technica/registry/gear/gear_3.html
Maybe I'm just clueless, but I've yet to figure out what
one would do with this. The Lego Mindstorms booklet doesn't
explain it at all. (My host laptop computer runs Linux, and
so if it is explained in the nifty multimedia CD-ROM that
came with Mindstorms, I've missed it.)
It took me weeks to finally figure out what the differential
gear really was, and I'm still trying to figure out the best
way top operate the brick seperator. Didn't even know what it
was until I saw it named in a catalog.
> Ram
Chris - Xenon
--
Chris Hanson | Xenon@3DNature.com | I've got friends in low latitudes!
New WCS 5 Demo Version! http://www.3DNature.com/demo/
"There is no Truth. There is only Perception. To Perceive is to Exist." - Xen
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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. In short I used one in each hand of the Robot I am
building, after gearing the the motor 1 or two "steps" (8 to 24 tooth) I
then inserted the Torque gear, and ran the axle straight to a worm gear
assymbly, the hand closes with a good deal of force, then when the fingers
reach the thunb, the force is greater then the presecribed limits then the
gear starts to slip and thus preventing damage to the structure.
http://www.brickshelf.com/cgi-bin/gallery.cgi?i=39790
They are really very handy if you can gear them for the proper application.
In lugnet.robotics, xenon@3dnature.com writes:
> Ram Meenakshisundaram wrote:
>
> > Isnt that the same as the white clutch gear. Here is a link to it:
> > http://w3.one.net/~hughesj/technica/registry/gear/gear_3.html
>
> Maybe I'm just clueless, but I've yet to figure out what
> one would do with this. The Lego Mindstorms booklet doesn't
> explain it at all. (My host laptop computer runs Linux, and
> so if it is explained in the nifty multimedia CD-ROM that
> came with Mindstorms, I've missed it.)
>
> It took me weeks to finally figure out what the differential
> gear really was, and I'm still trying to figure out the best
> way top operate the brick seperator. Didn't even know what it
> was until I saw it named in a catalog.
>
> > Ram
>
> Chris - Xenon
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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.
--
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WorkEmail: <sjbaker@link.com>
HomePage : http://web2.airmail.net/sjbaker1
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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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"Eric Sophie" <Legomaster@gobi.com> wrote in message
news:GB91vJ.21x@lugnet.com...
> 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
Ncm.
> the range of operable force applied before the clutch disengages. Nano
> Centemeter of force. In short I used one in each hand of the Robot I am
Newtons x cm. Not nano. :)
Iain (the metric pissant)
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