# Fibonacci Gauge The simple way

 Project by Karson posted 12-11-2009 05:49 AM 7805 views 25 times favorited 34 comments

So others people on LumberJocks have posted a Fibonacci Gauge that they built.So I thought I’d build one also.

This one is my first trial run.

Wood Magazine had a one page article on making one of these gauges. Issue 173 November 2006. Their gauge was 6 3/4” on the longest leg. I wanted to make one bigger.

So I developed an Excel Spreadsheet that will calculate the length of all of the parts. You give it three numbers and it will calculate 20 different gauges, starting at the numbers you give it and then getting bigger by a ratio of one of the numbers that you give it

The three numbers are the distance between the holes. The distance from the end to the first hole, and the multiplier between rows. So it could be something like 1/2” from end to first hole, 10” between holes, 1” more to the next row. So it would calculate 20 rows, starting at 10 inches and ending at 30 inches.

There are also three different sheets to the spreadsheets. Inches, Millimeters and Centimeters.

I opted to make my first gauge using Centimeters as my trial. I found some 1/4” wood in the shop that was about 1 1/2” wide and 48” long. So I started to look at the range of numbers that I could use that would give me the longest leg of about 120 CM. So by trying different starting point and different numbers between the rows of the sheet I ended up with Start at 40 CM, and increment by 1/10 of a Cm or 1MM and have 1CM from the end of the stick to the first hole.

The row that contained the 42 CM between the holes gave an easy draw for the legs.

The Part C was 44 CM the Part B was 68.957Cm and the Part A was 110.957CM. So it was fairly easy to draw the hole positions and the cut length of the parts.

The first hole was drilled 1 CM from the end and I drilled all 4 pieces at the same time. I then put a 1/4” bolt in the hole to keep the 4 pieces aligned while I drilled the second hole. It was 42CM away from the first hole Center to center.
I then cut the pieces to length on the chop saw using my measurements from the spreadsheet. I sanded the point on the appropriate pieces using a disk sander and rounded the end over also on the disk sander.

When I went to put the pieces together using the binding posts that I had purchased I found that I had misremembered. I thought the binding posts were 1/4” in dia. but in fact they were 13/64” in dia. So the binding posts are a little loose.

But like I said this was my first trial run, partially to prove out the spreadsheet and do develop a way to make them easily.

The next ones will be easier and more accurate (Not sloppy)

These binding posts are a pound in version. I also purchased some brass ones that have screw threads so they will be classier. And probably some fancy wood.

Picture one is the assembled gauge.
Picture 2 is the 4’ ruler with the wood.
Picture 3 is the binding post package This one is for total wood thickness of 3/8”.
Picture 4 is the individual pieces with the pound-in serrations
Picture 5 is the stack of wood on the drill press with the bolt in the end and the second hole drilled.

The holes in all 4 pieces are the same distance apart so they can be drilled at the same time.

The spreadsheet is available to anyone that wants one. Send me you real e-mail address so that I can send it to you.

I developed it for Microsoft Excel but there are clone programs out there that will work with Excel spreadsheets.

I’ve hears people ask on other posts where to find the binding posts.

I got mine at Grainger’s There are a wholesale house and do sell retail.

The aluminum ones are 3/8” of wood and 50 sets for around 13.00 the brass ones are 25 sets in a package and also around 13.00 a package.

If you are unable to find any anywhere and there is enough interest I can probably get some and sell them for cost plus postage.

My local Ace hardware had the Aluminum ones that had screws and they were around 80 cents a piece. The had a couple of different lengths in the small size, but thy also had them in 1” in length.

-- I've been blessed with a father who liked to tinker in wood, and a wife who lets me tinker in wood. Southern Delaware soon moving to Virginia karsonwm@gmail.com †