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Author Topic: Dels FD curve Plotter. Improved Video  (Read 8222 times)

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Offline snag

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Re: Dels FD curve Plotter. Improved Video
« Reply #15 on: July 22, 2011, 03:06:34 pm »
You've got quite the contraption there Del! So does this graph the poundage per inch pulled?
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Offline Del the cat

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Re: Dels FD curve Plotter. Improved Video
« Reply #16 on: July 22, 2011, 04:16:57 pm »
Quote from: snag on July 22, 2011, 03:06:34 pm
You've got quite the contraption there Del! So does this graph the poundage per inch pulled?
Exactly, once I've calibrated it, I'll draw up some graph paper to suit and photocopy it, the vertical scale will be marked in pounds and the horizontal scale in inches.
Del
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Offline Michael C.

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Re: Dels FD curve Plotter. Improved Video
« Reply #17 on: July 22, 2011, 07:26:58 pm »
Now all you need to build is a wooden robot arm to pull it at a steady pace :)
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Offline toomanyknots

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Re: Dels FD curve Plotter. Improved Video
« Reply #18 on: July 22, 2011, 07:44:46 pm »
Amazing.
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Offline TBod

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Re: Dels FD curve Plotter. Improved Video
« Reply #19 on: July 23, 2011, 05:36:31 am »
Like it!

Isn't the correct fd curve an average between when you go up and down. When you pull up the friction in the machine is working against you and when you go down it's working for you.
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Offline soy

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Re: Dels FD curve Plotter. Improved Video
« Reply #20 on: July 23, 2011, 05:55:22 am »
 ::) :-\tec.over load but quite interesting all in the same machine. Cool  8)
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Offline Del the cat

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What a Dumb Ass!
« Reply #21 on: July 23, 2011, 06:46:22 am »
I couldn't understand how when I calibrate the machine I get a lovely big vertical deflection, but when I do it with a bow the graph is about half as high as it should be ???.
Eventually after some extra tests it dawned on me..... I was a factor of 2.2 out, have you worked it out yet?
Yup, I was reading my dial in Kg not Pounds  ::).
Yeah but I figure that now I'm twice as strong as I though ;D
Del
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Offline gstoneberg

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Re: Dels FD curve Plotter. Improved Video
« Reply #22 on: July 23, 2011, 09:25:58 am »
LOL, gotta love it.  Hate to tell you, but as you get older those kinds of mistakes get a lot more common. :'(

Did you make the cool bow you put on the machine in your video?  Looked real nice.

George
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Offline Del the cat

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Re: Dels FD curve Plotter. Improved Video
« Reply #23 on: July 23, 2011, 10:25:47 am »
Quote from: gstoneberg on July 23, 2011, 09:25:58 am
LOL, gotta love it.  Hate to tell you, but as you get older those kinds of mistakes get a lot more common. :'(

Did you make the cool bow you put on the machine in your video?  Looked real nice.

George
Cheers George, yeah, I made that in 2009 using up some old f/glass lams I had from my crossbow making days, I glued them up unto a Maple core made from a bow I made which came in underweight. Here's a couple of pics.


Del
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Offline gstoneberg

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Re: Dels FD curve Plotter. Improved Video
« Reply #24 on: July 23, 2011, 10:45:09 am »
Nice, I'll bet it spits out an arrow.
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Offline Del the cat

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Re: Dels FD curve Plotter. Improved Video
« Reply #25 on: July 23, 2011, 11:29:52 am »
Quote from: gstoneberg on July 23, 2011, 10:45:09 am
Nice, I'll bet it spits out an arrow.
Yup it does but I don't shoot it much, the club where I shoot is theoretically a Longbow (ELB) club... but since I joined they allow primitive too ;D.
Just gotta finish tweaking the FD machine, then I can tidy the garage and makes some Yellow shavings ;D  ;).
Del
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Offline gstoneberg

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Re: Dels FD curve Plotter. Improved Video
« Reply #26 on: July 23, 2011, 01:27:55 pm »
I understand, it's nice they've compromised for you.  Of course, your ELBs are gorgeous so they must like you for that I'd think. ;)   I wondered if you'd started.  Have you practiced a splice yet?

George
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Offline Del the cat

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Re: Dels FD curve Plotter. Improved Video
« Reply #27 on: July 23, 2011, 02:03:46 pm »
Nope, but I'll get all done and tidied up, then I'll be ready to splice on Monday (when Mrs Cat goes out to choir, I can have some quality time with my wood ;D. Whoops, maybe I should rephrase that? :-[)
Del
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Offline Will H

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Re: Dels FD curve Plotter. Improved Video
« Reply #28 on: July 23, 2011, 09:13:24 pm »
Cool contraption Del!  :o
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Offline El Destructo

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Re: Dels FD curve Plotter. Improved Video
« Reply #29 on: July 23, 2011, 09:33:33 pm »
Still having fun with your wood...at Your Age....way to go Del...........    :laugh:
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