LumberJocks

3D Printed for Lumberjocks #3: Corner Center Tool

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Blog entry by WispWoods posted 02-01-2014 05:56 PM 755 reads 0 times favorited 5 comments Add to Favorites Watch
« Part 2: Tiny Stanley Part 3 of 3D Printed for Lumberjocks series no next part

Many complex shop tasks can be simplified with basic geometry. One good example is laying out an Octagon on the end of a square board. The math required to calculate the distance from the corner to the next point on the Octagon is more than I care to pursue. Luckily, through the magic of geometry we can easily mark of this distance with a compass.

The only tricky part is getting the point of your compass to register into the corner of the board (This is especially tricky with dimensional lumber, where the edges have round-overs).

For perfect results, the point needs to bite into half wood and half air.

My solution is what I’m calling the Corner Center.

This little gizmo perfectly aligns the tip of your compass with true corner. The magnet in the body also holds your compass point securely, ensuring accurate results.

Here is the tool ready to assemble. As you can see, it comes in three parts. The body, the cup and the magnet. A dab of super glue ties it all together.

First find the center of the board and set your compass to the distance from the center to the corner.

With the compass set, just position the Corner Center at each corner and make a mark on each adjacent edge.

After you’ve made marks from all four corners, just connect the marks for a perfect Octagon.

Check out my page on Shapeways for this tool and more good stuff.

Corner Center Body – Link

Corner Center Cup - Link

Wisp Woods Shapeways Shop – Link

-- - You begin thinking less, and feeling more.



5 comments so far

View Woodmaster1's profile

Woodmaster1

479 posts in 1253 days


#1 posted 02-01-2014 08:35 PM

Neat jig, I am going to have to print one with a few changes.

View WispWoods's profile

WispWoods

65 posts in 2093 days


#2 posted 02-01-2014 11:13 PM

Absolutely, the models for both parts are available for download. Get them and modify away. I’d love to see what you come up with.

-- - You begin thinking less, and feeling more.

View Woodmaster1's profile

Woodmaster1

479 posts in 1253 days


#3 posted 02-04-2014 06:04 PM

Here is a take on your device with handles. I printed this out today on my classroom 3D printer. The printer is a great tool for the students to use in engineering class.

View WispWoods's profile

WispWoods

65 posts in 2093 days


#4 posted 02-05-2014 12:58 AM

Very neat. It is cool to see another variation. What 3D printer do you use in your class?

I viewed your profile and WOW, 39 years of education experience. This makes me think that the 3D printer is but the latest in a steady stream of technologies that have come along to aid students in their understanding of engineering applications. I salute you, sir for your dedication to educating youth. I can only hope that it has been more rewarding than frustrating!

-- - You begin thinking less, and feeling more.

View Woodmaster1's profile

Woodmaster1

479 posts in 1253 days


#5 posted 02-05-2014 03:11 AM

I have a dimension 1200se. Expensive but the best out there. I have enjoyed teaching. I find it to be very rewarding and fun. We run a 3D derby contest against other schools to showcase students design and engineering talents.

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