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#1
08-13-2009
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Wiper motor tombstone popper
Hi all,
I'm just about finished with this tombstone popper, just need to mask the aluminum bar a bit. The skull will have UV paint highlights and a scream to go with it when it rises. It uses the motor controller board to raise and lower the linkage.
__________________
Thousands of years ago, cats were worshipped as gods. Cats have never forgotten this. 
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#2
08-13-2009
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That movement was not what I was expecting - it definitely will give more of a startle factor than the typical head popper movement.
__________________
"Life is pleasant. Death is peaceful. It's the transition that's troublesome." (Isaac Asimov)
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#4
08-13-2009
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I was also looking for it to go up and down. Did you reverse the air cylinder, so when it closes it pulls him up?
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#5
08-13-2009
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I used a wiper motor to raise and lower the skull. Here's a look at the motor and linkage in action.
__________________
Thousands of years ago, cats were worshipped as gods. Cats have never forgotten this.
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#6
08-13-2009
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Looks great and I, too, love the movement
__________________
Be afraid...be very afraid http://s133.photobucket.com/albums/q77/Lauriebeast/ http://s133.photobucket.com/albums/q...%20night%2008/
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#7
08-13-2009
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That's a different way of doing a tombstone popper. I like how you rigged it.
__________________
Where there is no imagination there is no horror. ~Arthur Conan Doyle, Sr.
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#8
08-13-2009
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Thanks - my limiting factor here was the small 'stone that I used. I won't have time to build a larger one this year (too many other projects) so I had to come up with something that would give me the extension I needed without sticking out too far behind the 'stone. The retracted height of the mech is ~20" and 40" extended. The pivot that the head is attached to is actuated using a length of piano wire and a spring. The head hangs well out of view when down. Lighting will help - a small flood in front of the 'stone will black out the background, and a UV light will be used to draw attention to the skull as it swings up. An MP3 player will provide a loud scream.
__________________
Thousands of years ago, cats were worshipped as gods. Cats have never forgotten this.
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#9
08-13-2009
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Love the movement!
__________________
http://hauntforum.com/album.php?albumid=790
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#10
08-13-2009
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That is great. I heard that pop and thought it was a air valve. I didn't hear the motor run in the first video. Really nice job.
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