[Robotgroup] Worm gearing questions

[Paul Atkinson]

I drew up some ideas at 2am when I couldn't sleep. Unfortunately I don't
have expertise with a decent drawing program to share those sketches. I'll
try to bring the sketch on Thursday.

I think you can do it with a servo and 2 connecting rods located below the
floor.

Another idea for the center opening doors is to use the threaded rod from a
turnbuckle. I'd cut the turn buckle in half so you get a left and right
threaded nut. Mount one to each door half and use a motor to turn the rod.

Most of this stuff is available at the hardware store or the hobby shop.

Paul

On Wed, Feb 27, 2008 at 8:13 AM, Denise Scioli <morg80 at hotmail.com> wrote:

>
> And, for my two cents, what about the clevis system we have used with the
> servo and the mechanical flower?  Works great.  We got the parts at a
> regular hobby store, I think they are airplane parts (minature, remote
> control).
>
> Denise
>
> ----------------------------------------
> > Date: Wed, 27 Feb 2008 00:35:13 -0800
> > From: gray_mack at yahoo.com
> > To: robotgroup at puremagic.com
> > Subject: Re: [Robotgroup] Worm gearing questions
> >
> > You could use a servo and pull/push rod or plastic zip
> > tie mechanism to convert the angular movement to the
> > door slide motion. The speed/direction/distance of
> > travel of the servo can be controlled very well so you
> > wouldn't need external limit switches or hbridge. The
> > servo can be controlled by RC, servo tester, or micro.
> > And if it wears out, it is off the shelf replacable.
> > -Gray
> >
> > --- "john at cozmicfunk.com" <john at cozmicfunk.com> wrote:
> >
> > > Hey fellow Roboters!
> > > I am making a gearing system for one my my miniature
> > > sets. I am
> > > designing a sliding door like in Star Trek that
> > > would slide back and
> > > fourth and I was wondering where I could find a worm
> > > gearing system and
> > > or components. I was thinking I could use belts but
> > > I need to not have
> > > any obstructions behind the door, the system has to
> > > be behind the wall
> > > that the door slides back behind as it opens/closes.
> > >
> > > I initially thought if I could find one of those SST
> > > car toys at a  Wal
> > > mart etc. They have not made those again for a few
> > > years, they do have
> > > this rip chord with teeth and a wheel with gears, as
> > > you pull the chord
> > > through the wheel it, it spins the wheel much like a
> > > chain on a
> > > motortcycle.  I could use that concept, but I don't
> > > even know where to
> > > look for them. I do know many of you inventor types
> > > have Worm gearing
> > > and that may also be a great alternative. Maybe
> > > Andre, Tom, Vern or
> > > Eric, anyone else out there have any idea what I am
> > > talking about, offer
> > > suggestions and a location to find such hardware
> > > locally?
> > > Thanks :)
> > > JPF
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> >
> >
> >
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