[TheForge] Cool kinematic web site

[Bruce Freeman]

I've played with some of those "perfect" straight-line motions.  You'd
better have some high-precision bearings on your erector set!  One major
reason I selected the grasshopper straight-line motion for my treadle
hammer was that it has only two pivots (or arms) between the ram and the
frame.  (Yes, there are also more distant linkages, but those are less
critical linkages.)

Peaucellier's (sp?) SLM was particularly appealing, but I figured it
would never fly!  Or hammer for long, either.

Still, they're fun to play with.

Bruce
NJ

>>> frosty at customcpu.com 2/3/2005 3:09:20 PM >>>
It's one of the 4 link models; Watt linkage maybe? It's there, I saw
it. 
<grin>

I'm going to revive and maybe upgrade my erector set so I can
experiment 
with some of the linkages. One of the 8 link models is suposed to have

"perfect" one dimension movement.

Frosty
------------------------
If it ain't forged
it ain't real.
Wrought iron is.
The FrostWorks

Meadow Lakes, AK.


----- Original Message ----- 
From: "Bruce Freeman" <FREEMAB at pt.fdah.com>
To: <theforge at mailman.qth.net>
Sent: Thursday, February 03, 2005 5:14 AM
Subject: Re: [TheForge] Cool kinematic web site


> That's a keeper!
>
> The grasshopper is probably there somewhere, but I'm not sure I've
> found it.  S05 maybe?  I think they might be missing one or two I
know
> of, but I find those models a bit hard to interpret.  Maybe when I
have
> more time...
>
> Bruce
> NJ
>
>>>> frosty at customcpu.com 2/2/2005 3:44:43 PM >>>
> This was posted to the Sandbox and I figured there were plenty of
folk
> here
> who would enjoy it.
>
> Bruce, you'll find the grasshopper in the "S" models.
>
> http://kmoddl.library.cornell.edu/index.php 
>
> Try not to spend too many hours, there are things to DO you know.
>
> I just can't wait to see what Mike S. will come up with. <grin>
>
> Frosty
> ------------------------
> If it ain't forged
> it ain't real.
> Wrought iron is.
> The FrostWorks
>
> Meadow Lakes, AK.
>
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