[TheForge] Cool kinematic web site

[Jerry Frost]

Agreed.

Until we develop a true nano-construction industry perfection is a concept 
rather than a reality. Even that is only atomic precision; somewhat less 
than perfection. I expect a bit less from my erector set though so it's 
okay.

I think you made a good choice for the grasshopper too. Though I haven't 
looked through, let alone experimented with all the straight line linkages I 
haven't seen one simpler and with a hammer simple means robust.

PeaucUellier (mythspelled for the pun. <grin>) has a few linkage devices but 
I think I know which one you mean. The 8 link yes? It is appealing but looks 
awfully fragile for a blacksmith. Maybe a blacksmith's clock? <grin>

Fun stuff for sure. I'll let Heath over at the Artmetal Sandbox know the URL 
is being enjoyed here.

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 11:24 AM
Subject: Re: [TheForge] Cool kinematic web site


> 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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