« previous next »
Pages: 1 [2]

Author Topic: Dels FD curve Plotter. Improved Video  (Read 8210 times)

0 Members and 2 Guests are viewing this topic.

Offline snag

  • Member
  • Posts: 419
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?
Logged
Is. 49:2 ....He made me a polished arrow and concealed me in His quiver.

Offline Del the cat

  • Member
  • Posts: 8,322
    • Derek Hutchison Native Wood Self Bows
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
Logged
Health warning, these posts may contain traces of nut.

Offline Michael C.

  • Member
  • Posts: 576
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 :)
Logged
"Friendship makes prosperity more shining and lessens adversity by dividing and sharing it."

Cicero

Offline toomanyknots

  • Member
  • Posts: 3,132
Re: Dels FD curve Plotter. Improved Video
« Reply #18 on: July 22, 2011, 07:44:46 pm »
Amazing.
Logged
"The way of heaven is like the bending of a bow-
 the upper part is pressed down,
 the lower part is raised up,
 the part that has too much is reduced,
 the part that has too little is increased."

- Tao Te Ching, 77, A new translation by Victor H. Mair

Offline TBod

  • Member
  • Posts: 275
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.
Logged

Offline soy

  • Member
  • Posts: 2,897
  • pm106221
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)
Logged
Is this bow making a sickness? or the cure...

Offline Del the cat

  • Member
  • Posts: 8,322
    • Derek Hutchison Native Wood Self Bows
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
Logged
Health warning, these posts may contain traces of nut.

Offline gstoneberg

  • Member
  • Posts: 3,889
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
Logged
St Paul, TX

Offline Del the cat

  • Member
  • Posts: 8,322
    • Derek Hutchison Native Wood Self Bows
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
Logged
Health warning, these posts may contain traces of nut.

Offline gstoneberg

  • Member
  • Posts: 3,889
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.
Logged
St Paul, TX

Offline Del the cat

  • Member
  • Posts: 8,322
    • Derek Hutchison Native Wood Self Bows
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
Logged
Health warning, these posts may contain traces of nut.

Offline gstoneberg

  • Member
  • Posts: 3,889
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
Logged
St Paul, TX

Offline Del the cat

  • Member
  • Posts: 8,322
    • Derek Hutchison Native Wood Self Bows
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
Logged
Health warning, these posts may contain traces of nut.

Offline Will H

  • Member
  • Posts: 2,120
Re: Dels FD curve Plotter. Improved Video
« Reply #28 on: July 23, 2011, 09:13:24 pm »
Cool contraption Del!  :o
Logged
Proud Member of Twin Oaks Bowhunters
           Clarksville, Tennessee

   "Middle Tennessee is the place to be"

Offline El Destructo

  • Member
  • Posts: 8,078
  • Longhaired Crippled Hippie Biker And Proud Of It!!
    • Desert Sportz Primitive Archery
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:
Logged
As a species we're fundamentally insane. Put more than two of us in a room, we pick sides and start dreaming up ways to kill one another.Why do you think we invented politics and religion.
Think HEALTHCARE Is Expensive Now,Wait Till It's FREE
Do Or Do Not,There Is No TRY
2024...We Will Overcome
Pages: 1 [2]
« previous next »