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Old 06-06-2010, 05:14 PM   #1 (permalink)
 
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Join Date: Oct 2006
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Default Segmenting puzzle

Just for some fun, see if you can figure out how to cut this segmented blank.
When the blank is in the square, the red points reach the end of the blank.
The yellow points reach about 2/3 of the way to the other end.
But once the blank is turned round the length of the red and yellow blanks are the same. The point of the yellows don't move.
I'm busy building this blank now, but it's too late to continue or my neighbours would shoot me ( unless my wife did it first !!)

This one can easily be done with a table saw, but mine has wavey diagonals and I'm using a router. Either way, the ends of the blank would look the same and reveal the way it was cut. I just drew it like this because it's difficult to draw wavey lines in MS Paint.

Have a think and post a pic of two squares with the way you believe the ends would look

Edit;; The ends of the points MUST remain sharp and not become rounded once turned!!!
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blank.jpg   blank2.jpg  
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Last edited by skiprat; 06-06-2010 at 05:16 PM.
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Old 06-06-2010, 05:33 PM   #2 (permalink)
 
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traditional archers make these all the time when footing wooden arrows, i am told there is a jig available for doing it which uses a router, i am sure a google search could turn up more info

it would probably be called a four footing jig

the big difference is the archers do it on round stock to start off with

the main reason for doing this to arrows is to put a heavier, harder piece of wood at the front of the arrow, but the joint has to be very strong to take the impact

hope this helps
MIK
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Old 06-06-2010, 05:54 PM   #3 (permalink)
 
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Hi Mik, welcome to the IAP

I don't doubt you for a second that there is a snazzy tool/ jig out there to do such a cut.
But most of us only have basic stuff like bandsaws and table saws and maybe a router ( and lathes of course)

Can your gadget ( please find a pic if you can, thanks) do wavey lines?

Here's a pic of my router template that I knocked up with a piece of clear polycarb, 8 screws, and a bit of MDF. I just glued a strip of aluminium along the edge to make sure it was smooth.
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Old 06-06-2010, 06:28 PM   #4 (permalink)
 
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I found some pics of a footing jig that Mik referred to. ( I think )

It looks very interesting and not too difficult to make. The jig looks like it would make the pale wood cuts and from what I gather, the dark wood is two pieces, each with a split. I couldn't find a jig to do those bits but I guess you could use a bandsaw. I don't know how sharp the edges and points would be.

Thanks for jumping in Mik, I'm gonna do some more googling and maybe copy one of them.

LOL, see if you can find a similar jig to do the wavy cuts
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Old 06-06-2010, 08:20 PM   #5 (permalink)
 
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That is a four footing jig you found but the dark wood is not two pieces, but one with kerfs cut in at 90 degrees to each other. The light wood is inserted into the kerfs and the dark wood is wedged outward and the whole thing is clamped and glued. This is a pretty common way to fix broken arrows or add some additional weight to the tip of the arrow for more durability and/or better penetration and flight.

I have not seen wavy lines done but I have seen spiraled designs, made by heating and twisting the arrow.
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A man who works with his hands is a laborer, a man who works with his hands and his mind is a craftsman, but a man who works with his hands, his mind and his heart is an artist. - Louis Nizer (1902-1994)
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Old 06-06-2010, 08:30 PM   #6 (permalink)
 
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Quote:
Originally Posted by skiprat View Post

Here's a pic of my router template that I knocked up
So do we have to wait 9 months for the outcome?
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Old 06-06-2010, 08:35 PM   #7 (permalink)
 
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Quote:
Originally Posted by BRobbins629 View Post
So do we have to wait 9 months for the outcome?
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Old 06-07-2010, 12:41 AM   #8 (permalink)
 
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Quote:
Originally Posted by jthompson1995 View Post
That is a four footing jig you found but the dark wood is not two pieces, but one with kerfs cut in at 90 degrees to each other. .
Thanks Jason. I found a pic. It looks simple enough to do using these archers methods. I wonder if pool que's can or are done like that?
Thanks you guys

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So do we have to wait 9 months for the outcome?
LOL
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Old 06-07-2010, 02:23 AM   #9 (permalink)
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hi,
I am a french turner and I do not speak English, so I go through a translator.
I found this:
http://www.supreme.fr/fabqueue.html

jean-Jacques
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Old 06-07-2010, 02:58 AM   #10 (permalink)
 
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Welcome!!! Thank you for that great link Jean-Jacques. I can't speak French but if you go to the bottom of that page and click on 'Cherger le Pdf' then it gives a much bigger document ( as a Pdf )

I'm really pleased that a couple of new guys have joined in here. I'm sure we can learn something from you guys.
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