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Fibonacci Gauge & Coping Sled

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Project by CaptainSkully posted 08-25-2009 05:44 AM 11565 views 18 times favorited 11 comments Add to Favorites Watch

After browsing LJ’s archives and watching TheWoodWhisperer’s “Gadget Station” series, I decided to build a couple of things for the shop. As a Mechanical Engineer, I’m fascinated by Fibonacci and am in the process of designing our dining room table according to the Golden Mean. Did I mention that the gauge is deadly accurate?

Marc did a bunch of tenons using a coping sled, so I picked some up some toggle clamps today at Rockler and set it up to work on both ends of my table saw/router table.

I may not be ready for the Aurora table, but I’m getting darn close…

-- You can't control the wind, but you can trim your sails





11 comments so far

View John Gray's profile

John Gray

2370 posts in 2630 days


#1 posted 08-25-2009 05:56 AM

Very nice!!!! Thanks for the post I saved the pix for later reference.

-- Only the Shadow knows....................

View a1Jim's profile

a1Jim

112818 posts in 2322 days


#2 posted 08-25-2009 06:23 AM

sounds good

-- http://artisticwoodstudio.com Custom furniture

View degoose's profile

degoose

7051 posts in 2099 days


#3 posted 08-25-2009 09:39 AM

HUH?

-- Drink twice... and don't bother to cut... @ lazylarrywoodworks.com.au For lovers of all things timber...

View degoose's profile

degoose

7051 posts in 2099 days


#4 posted 08-25-2009 09:47 AM

OK now I understand.. I already knew about the golden mean but got lost with the reference to Fibonacci
For those like me check out The man himself

-- Drink twice... and don't bother to cut... @ lazylarrywoodworks.com.au For lovers of all things timber...

View CaptainSkully's profile

CaptainSkully

1193 posts in 2303 days


#5 posted 08-25-2009 05:34 PM

Sorry, I should’ve included the links.

-- You can't control the wind, but you can trim your sails

View TheDane's profile

TheDane

3972 posts in 2408 days


#6 posted 08-26-2009 03:02 AM

These look terrific!

I’d like to make a Fibonacci gauge, but nobody around here stocks binder posts and I’ll be hanged if I am going to buy a box of 100 to get 4. What hardware did you use?

-- Gerry -- "I don't plan to ever really grow up ... I'm just going to learn how to act in public!"

View David65's profile

David65

190 posts in 2030 days


#7 posted 08-26-2009 04:30 AM

Yes I was stumped also but once the dear in the head lights wore off it all clicked. Can you pots the measurements of each peace? I would like to make my own…

-- David '65

View CaptainSkully's profile

CaptainSkully

1193 posts in 2303 days


#8 posted 08-26-2009 05:52 PM

I too had trouble with the hardware. I bought something at Rockler, but it wasn’t right. I just hid the problem in the photo. I’m thinking about something like the mating screws that they use to attach knife handle scales to the blade. You can get them in small quantities and they’ll handle the thickness (or lack thereof) properly.

Here’s the diagram I used. As an engineer, I have no problem with metric units, and I think they’re more accurate in this application. These ended up over a foot long. The nice thing is that you can scale this to any proportions you want by multiplying or dividing the dimensions.

As I mentioned before, they’re deadly accurate. When I placed two dividers on 0 and 100mm, the third pointer was invisibly close to 161.8. You can also buy plans online for about $3.

Make sure you make the parts oversized of the measurements. The measurements are for the pivot points and tips of the pointers.

Fibonacci Gauge Diagram

-- You can't control the wind, but you can trim your sails

View David65's profile

David65

190 posts in 2030 days


#9 posted 08-27-2009 02:40 AM

Sweet Thank you that makes since now. I went online and did some research saw the outcome to be the same but didn’t know the measurements.

-- David '65

View Innovator's profile

Innovator

3584 posts in 2158 days


#10 posted 08-27-2009 05:02 AM

Came out great. I have plans for it, I just need to get it done.

-- Whether You Think You Can or You Think You Can't, YOU ARE RIGHT!!!

View kimball's profile

kimball

323 posts in 2042 days


#11 posted 07-22-2011 08:08 PM

I just finished (without any finish yet) a copy of the one Captain Scully shows and had the hardest time getting the hardware. I finally found some at Jo-Ann’s fabric and crafts.
I had to counter drill w/ a brad point bit in order to set the heads in the wood as the binder posts and extensions were either too short without extensions or too long w/ extensions. I also had to install a spacer between the two long legs so that the entire thing would fold flat.
Haven’t had a chance to try them out yet but checked the measurements and found that mine are dead on.
Kimball

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