This is a more advanced version of the Trammel of Archimedes I posted last week. Since this is above my woodworking skills, I took the easy road and 3D printed the design. All STP and STL files are included in the last step for you to download. Also, I bet there are woodworkers and machinists that can produce a much nicer version out of “real” materials. If anyone tries, please post pictures in the comments.

The CAD animation which is quite mesmerizing is shown here:

See the actual print version in motion here:

Step 1: Tools/Materials


  • 3D Printer
  • Screw Driver
  • Wood file or sandpaper (depends on the quality of your printer)


  • Screws: Pan Head, #6, ¾” Long
<p>First off, beautiful job and beautiful prints.</p><p>Secondly, I was just curious as to how exactly the holes in the handle were calculated, given the distances they are sliding or the lengths of the sliders, or whatever info is needed to calculate such a thing.</p><p>Thanks a ton in advance</p>
<p>Thank you. I have to admit that I used CAD and animation to work out the first set of dimensions. However, before I finished, I did go back and check the math. I just added my calculations as a picture on step 4. Note that I stated that the first horizontal dimension (2&quot;) is arbitrary. This is correct to a certain point. Realize that the slides can't fall out of slots on the ends or collide in the middle. I'm sure there is a mathematician out there that could do a much better job explaining it. </p>
<p>This is so cool!</p>
<p>Thank you</p>
<p>Upload more</p>
<p>This is very cool, I would build it if I had a 3d printer!</p>
<p>Thanks. I don't have a printer either. My local library offers the service. </p>
<p><strong>That's great! Really nice.</strong></p>
<p>thank you</p>
<p>wow a really nice mechanical mechanism</p>
<p>My guess says it is also an ellipse.</p>
<p>Based on the animation, it looks like an oval. I think the sections in the middle are straight. </p>
<p>Nice! Next you should try the antikythera mechanism</p>
<p>Thanks. I had to look that up. That's way above my capabilities even though the tech is 2000+ years old. </p>
<p>&Epsilon;&upsilon;&rho;ή&kappa;&alpha;! Cool pront, thanx for sharing!</p>
<p>Thank you</p>
<p>This is very well done. I like it a lot! :)</p>
<p>Thanks. </p>
Nice. I know the handle of a 2 axis trammel transcribes an ellipse. What does this one do?