Trammel of Archimedes

Intriguing, nicely animated also.

-- "Checking for square? what madness is this! The cabinet is square because I will it to be so!" Jeremy Greiner LJ Topic#20953 2011 Feb 2

Hello Andreas

A nice project

I have already seen this : A jig to cut an ellipse with a router

Thanks for sharing

-- Diggerjack-France ---The only limit is the limit of the mind and the mind have no limit

I have been working one of these for myself for a few days now.. :) They’re so intriguing!

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

Looking good! Gives me an idea for a marble pump ;-)

-- "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence Wake Up America!! Please read; http://www.commondreams.org/view/2009/01/26-0

Ah!! The old BS grinder. First saw one of these back in ‘58-’59. Glad to see it’s still around for another generation. Nice project though.

I posted several of these but I think you have a different design yet. Looks like it works smoothly. The animation is cool but WAY beyond my computing skills.

-- " I'll try to be nicer, if you'll try to be smarter" gfadvm

Smoke grinder, is how I heard them called. I like the pop rivet idea~ no screws to come loose.

I hate loose screws. Well, aside from a few old friends.

-- Dan V. in Indy

Good job. These are fun to make and you did a good job.

I made one of these out of left over maple, about 25 years ago, and kept on my desk at work. Every time my engineering manager came to my cubical he would pick it up and play with it!

After a few months he finally asked me what this is, or called, and I told him it was a ”bulls..t grinder”! He never put two and two together and now you know why I made it just for him!

These things never get old!

-- "I never met a board I didn't like!"

Like.

Awsome animation.Great project.One of jigs I would like to have in my garage.

-- Ivan, Croatia, Wooddicted

Made one of these in Jr High shop class over 50 years ago. Teacher called it an air grinder back then. PC was in action there I think. I’ll bet he called it something else to adults.

Paul

-- The nicer the nice, the higher the price!

These are great for the fidgity folks that visit your office. Or, give one to the “Cranks” in your life.

Nicely done!!!

-- DJ Peck, Lincoln Nebraska. I don't have a Shop. I think of it as a Tool Chase. Where the hell did I put that?

Very cool

-- Dave, from Canada, http://simplywoodproducts.ca