Alt-BEAM Archive
Message #11085
To: beam@sgiblab.sgi.com
From: "Dennison Bertram" dibst11+@pitt.edu
Date: Tue, 29 Feb 2000 18:08:51 +1100
Subject: RE: mini walker
>
>
> Well coils aren't hard to wind. Just wind up the wire like it was in a
roll.
> Try to keep the wire even however. That's important. Maybe try winding it
> around a screw perhaps, or something like that. You'll honestly have to
> experiment with it.
>
> dennison
>
>
> Would one of those major henry coils put more kick wound as it is, or if
> it were wound into a more compact form?
>
> The major henry coils are like the following:
> _____
> || / \
> || / ,-. \
> || | | | |
> || \ `-' /
> || \_____/
>
>
> The robot I'm woking on needs the kick those major henry coils put out,
> but the space is limiting. It'd be much easier to have a could shaped
> like the following:
>
> ______ ___
> | | / \
> | | | O |
> |______| \___/
>
> Is there anything special to winding coils? would the major henry coil
> have as much kick as it curently does if it were rewound like the lower
> picture?
>
> I appreciate any advice. I need that kick, but space is limited. I'm
> using Radio Shack Part # 64-1895 Rare Earth Magnets. I need the coil to
> be able to pull and repel the magnet across about 1/4 inch horizontal
> movement. The coil works, but it simply is too large (diameter wise) for
> my project. 3/8 inch is the maximum diameter that will work without the
> core being off center from the magnets.
>
> Have any advice?
>
> Thanks!
>
>
>
> Dave Hrynkiw wrote:
> >
> > At 10:29 PM 2/27/00 , Richard Piotter wrote:
> > >Your "major henry" coils... Can they be unwound and then rewound on a
> > >new core without damaging the enamel coating?
> >
> > ...I think so. I regularly "pull" off wire from the coils to make longer
> > leads. But the re-winding portion is a nasty bit'o'business. Not fun to
> > spool it up and try to re-glue the windings. What you have in mind?
> >
> > >How fast do those things
> > >usualy trigger in a Solar Engine like a Magbot?
> >
> > Same time delay as any other SE - depends on the voltage trigger, cap
> size,
> > and sunlight. But in regards to discharging, they're just as quick as a
> > motor. After all, they're what - 13 ohms?
> >
> > >What size solar panel
> > >would you recomend to drive a Bicore and and SE that is time triggered
> > >off the Bicore?
> >
> > ...to drive a bicore and a SE? I'd probably want to stick with the 5V
> > cells, being the 3733 & 3766, as the '240s all run better on higher
> voltages.
> >
> > Regards,
> > Dave
> > ---------------------------------------------------------------
> > "Um, no - that's H,R,Y,N,K,I,W. No, not K,I,U,U, K,I,_W_. Yes,
> > that's right. Yes, I know it looks like "HOCKYRINK." Yup, only
> > 2 vowels. Pronounciation? _SMITH_".
> > http://www.solarbotics.com
>
> --
>
>
> Richard Piotter The Richfiles Robotics & TI web page:
> richfile@rconnect.com http://richfiles.calc.org
>
> -- Make Money by Simply Surfing the Net or responding to E-Mail!!!
> -- Click below!!!
>
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>
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