Catapult Saturday II

Social get-togethers, business meetings, outings and scoutings
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metis
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Re: Catapult Saturday II

Postby metis » Tue Feb 24, 2009 11:48 am

this stuff is pretty tough. dunno what it's like under load, but think guitar string, except i can't break it. (smallest guitar string is pretty easy to snap)

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noise
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Re: Catapult Saturday II

Postby noise » Tue Feb 24, 2009 11:55 am

metis wrote:this stuff is pretty tough. dunno what it's like under load, but think guitar string, except i can't break it. (smallest guitar string is pretty easy to snap)


Yeah that probably wouldn't break, when I was asking about it I was thinking of using 30-40 gauge nichrome (battery powered even), but deflection could still be a issue. That's maybe less of a problem for freehanding, my application uses guides.

I'll see what I can find and we can decide which to use on Sat.
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Theo
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Re: Catapult Saturday II

Postby Theo » Tue Feb 24, 2009 12:04 pm

You'd be setting up the wire rig kinda like an old-fashioned bucksaw, right? H-shaped wood frame, with hot wire at the bottom & turnbuckle at top for tension adjustment?

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noise
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Re: Catapult Saturday II

Postby noise » Tue Feb 24, 2009 12:08 pm

Theo wrote:You'd be setting up the wire rig kinda like an old-fashioned bucksaw, right? H-shaped wood frame, with hot wire at the bottom & turnbuckle at top for tension adjustment?


Yeah, I'm thinking threaded rod an wing nuts, but yeah.
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Theo
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Re: Catapult Saturday II

Postby Theo » Tue Feb 24, 2009 12:21 pm

noise wrote:I'm thinking threaded rod an wing nuts

Same concept but easier to tighten. I like it.

(Probably want to sleeve the threads somehow, where they pass through the frame on the wing-nut end of the rod, so they slide & don't bite into the wood as you tighten.)

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Nicholas Lee
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Re: Catapult Saturday II

Postby Nicholas Lee » Tue Feb 24, 2009 5:57 pm

i think one of the issues for the foam sculpting will be scale - relative to the yet to be completed spoon.

also: anyone have butcher paper? or something decent for sketching out these things to scale.

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noise
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Re: Catapult Saturday II

Postby noise » Tue Feb 24, 2009 6:14 pm

Theo wrote:(Probably want to sleeve the threads somehow, where they pass through the frame on the wing-nut end of the rod, so they slide & don't bite into the wood as you tighten.)


Yeah I was thinking that too. I'll try it without and see how it goes.

I have the frame together and just went out to get the transformer, etc.

Makes me kinda nervous to be working with wall AC.
Last edited by Theo on Tue Feb 24, 2009 6:15 pm, edited 1 time in total.
Reason: fixed nested quote
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hootenanny
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Re: Catapult Saturday II

Postby hootenanny » Tue Feb 24, 2009 8:53 pm

Nicholas Lee wrote:i think one of the issues for the foam sculpting will be scale - relative to the yet to be completed spoon.

also: anyone have butcher paper? or something decent for sketching out these things to scale.

metis should have some laying around.

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noise
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Re: Catapult Saturday II

Postby noise » Thu Feb 26, 2009 8:56 pm

I finished the hot wire foam cutter, works great! I just wired it up with mechanics wire for testing, glows red in less than a second and is easily controllable with the dimmer.
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Theo
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Re: Catapult Saturday II

Postby Theo » Thu Feb 26, 2009 9:20 pm

Awesome! Michael & I got the 'pult frame tightened up and battened down today (yeah I actually drove to his place & back in all that blizzard crap, not fun) and now the spoon veneering is next.


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