[HH] Opening a skull (on topic, honest!)

[Greg London]

If you want it to 'snap' shut, maybe you want a cam or something out of  
round. The part that sticks out pushes down. then when the cam rotates far  
enough, it snaps shut.


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-----Original message-----
From: Mark Komarinski <mkomarinski at wayga.org>
To: hardwarehacking at blu.org
Sent: Tue, May 1, 2012 21:20:07 GMT+00:00
Subject: Re: [HH] Opening a skull (on topic, honest!)

On 5/1/12 4:53 PM, Tom Metro wrote:
> Mark Komarinski wrote:
>> The tension that's required to open it is too much for the
>> servo that I have.  I was thinking a linear actuator...
> A solenoid is the obvious thing that comes to mind:
>  
http://www.halted.com/commerce/catalog/product.jsp?product_id=13355&czuid=133 
5905228724
>  
http://www.allelectronics.com/make-a-store/item/SOL-102/MINIATURE-12VDC-PUSH- 
TYPE-SOLENOID/1.html
>
> Of course with a solenoid you're pretty much stuck with a fast acting,
> full travel motion. If you want to some day animate the mouth to sync to
> speech or something, then it wouldn't be the right choice.
>
>
Ah, a friend gave me one that is in two pieces (the inner shaft can be 
removed from the solenoid).  The range of movement was rather small but 
after thinking about it may be enough to get the jaw to open.  I'll 
fiddle with it a bit more and maybe find a larger servo (thanks Drew).

Expect more stupid questions.

-Mark
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