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Impossible II

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Blog entry by BritBoxmaker posted 08-03-2010 06:39 PM 3145 reads 44 times favorited 18 comments Add to Favorites Watch

Hi everyone. Here is the method for making the Impossible II. Before we start I didn’t take any photos during the build for this one. I needed to concentrate full time on it and taking pics can be distracting. The CAD drawings provided here should do the job . I’ve seen Steve (spalm) use this sort of thing to great effect. I’m not giving exact sizes, you can scale things off of the pics. This will give you the angles too, mostly 60°.

First the complete pattern

You need to find the minimum repeatable unit, which in this case is a hexagon

This is made up of six triangles

Each of these triangles is made up of five pieces

The four woods I used were Pau Amarello, Padauk, Purpleheart and Ebony

So for the whole hexagon you need six of the large shapes (of each of the first three woods), two of the mid sized shapes (of each of the first three woods) and six small Ebony triangles.

To make an end grain pattern you make up sticks with the above outlines, long enough to cut into slices, when the hexagon is finished, to make up your overall pattern.

I first glued up the pieces for each of the six triangles using PVA and masking tape to bind them, cleaned them up on the drum sander and then stuck them together (in the correct order) again with PVA and tape.
When this assembly was dry I removed the tape and sliced the hexagonal stick into slices, arranged and glued them to a backboard and trimmed it with Ebony.

Thats it in a nutshell. Have fun.

-- Martyn -- Boxologist, Pattern Juggler and Candyman of the visually challenging. http://www.theartofboxes.com



18 comments so far

View Cozmo35's profile

Cozmo35

2199 posts in 1790 days


#1 posted 08-03-2010 07:05 PM

Martyn, This is an amazing piece, but you make it sound easy with your description. I am in awe of your talent! THANK YOU FOR POSTING IT!!

-- If you don't work, you don't eat!.....Garland, TX

View kevinw's profile

kevinw

183 posts in 2493 days


#2 posted 08-03-2010 07:19 PM

How did you cut the pieces in an accurate and repeatable enough fashion?

-- Kevin, Blue Springs, MO

View miles125's profile

miles125

2179 posts in 2759 days


#3 posted 08-03-2010 07:24 PM

Very cool. Looks like one of those magic eye pictures.

-- "The way to make a small fortune in woodworking- start with a large one"

View lumberdustjohn's profile

lumberdustjohn

1259 posts in 1920 days


#4 posted 08-03-2010 07:32 PM

Thanks for the posting.
This is not on my to do list yet.
I will relax and enjoy yours.

-- Safety first because someone needs you.

View BritBoxmaker's profile

BritBoxmaker

4448 posts in 1790 days


#5 posted 08-03-2010 08:06 PM

Kevin, I cut them on a tablesaw with the blade set to 60°. Oh and a fence to cut against. Distances set using the micro-adjuster I posted recently. Plus I cut all of one size in one go without a break and no adjustment of the fence between cuts.

-- Martyn -- Boxologist, Pattern Juggler and Candyman of the visually challenging. http://www.theartofboxes.com

View BertFlores58's profile

BertFlores58

1646 posts in 1676 days


#6 posted 08-03-2010 09:29 PM

Martyn, you are so precise in doing all the pieces in systematic way. The smallest ones to do is the ebony and the other which I think was done gluing the component board then ripped it to a prismatic triangle, crosscut to thickness. The trapezoid component of the triangle is ripped then crosscut. Hard to guess, and much harder to do it. Thanks for posting.

-- Bert

View Dennisgrosen's profile

Dennisgrosen

10850 posts in 1869 days


#7 posted 08-03-2010 10:34 PM

Martyn
thank´s for posting
one more question
I know you played around with endgrain but cuoldn´t it have been made
the otherway and obtained the same feeling in the finished piece
and wuoldn´t it have been easyer to make the cuts and glue up

Dennis

View moshel's profile

moshel

864 posts in 2438 days


#8 posted 08-03-2010 10:53 PM

that takes some precision cuts to get without noticeable gaps in the glueup….

as I am not as precise i would at least glue the inner pieces of wood and then rip them to triangles. would save me on ripping very small strips that i don’t really like. will also make the glueup easier (but add a stage). amazinf work and thanks for the blog!!!!

-- The woods are lovely, dark and deep, but I have promises to keep...

View tyskkvinna's profile

tyskkvinna

1308 posts in 1740 days


#9 posted 08-03-2010 11:28 PM

Geometry and I are pretty good buddies, but this makes my head hurt just watching …

-- Lis - Michigan - http://www.missmooseart.com - https://www.etsy.com/people/lisbokt

View SPalm's profile

SPalm

4940 posts in 2636 days


#10 posted 08-04-2010 12:03 AM

Martyn, This is an amazing design. It really came out well. I would not have thought that such a complicated pattern would look so fantastic.

It also seems like doing it in endgrain was the way to go. That would have been a lot of small pieces if done with one glue-up in face grain.

Good job Sir,
Steve

-- -- I'm no rocket surgeon

View Chris Cunanan's profile

Chris Cunanan

339 posts in 2234 days


#11 posted 08-04-2010 03:11 AM

i would think it would be easier to make a couple glue-ups of longer stock, then just crosscut the triangles off ‘n piece together individually…i’m just thinking out loud, but please someone correct me if there would be an easier way? i’d love to try this, i could imagine it so tricky looking ‘n pleasing to the eyes if done right in the end.

View Mary Anne's profile

Mary Anne

1057 posts in 1962 days


#12 posted 08-04-2010 04:20 AM

You have outdone even yourself on this one, Martyn.
It’s great the way you break these down to the simplest (?) common piece and turn it into something extraordinary.

View zlatanv's profile

zlatanv

689 posts in 1988 days


#13 posted 08-04-2010 07:19 PM

Mind numbing!

-- Z, Rockwall, TX

View BritBoxmaker's profile

BritBoxmaker

4448 posts in 1790 days


#14 posted 08-04-2010 11:10 PM

Steve, Experience tells me that reduction and endgrain in combination are the only way I’d go for something this complicated, these days.

Thanks all for your attention and interest. I need a rest.

-- Martyn -- Boxologist, Pattern Juggler and Candyman of the visually challenging. http://www.theartofboxes.com

View Steph78's profile

Steph78

68 posts in 1599 days


#15 posted 08-16-2010 12:53 AM

Pure genius! That is just amazing! Thanks for posting it!

-- Steph, Phoenix

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