Just letting you know, I did this project at school in my dorm room and in the shop with whatever materials I could find. I made this table out of wood but I really want to make this using a 3D printer!
Here's a video of the mechanical legs operating to demonstrate its awesomeness.
sliding on the tile floor
Step 1: Materials
About 14 ft of 1"x2" Pine Wood
About 8 ft of 2"x3" Pine Wood
About 13 ft of 2"x4" Pine Wood
About 3 ft of 1"x4" Pine Wood
About 16 ft of 3/8" Threaded Round Rod
About 10 ft of 1/2" PVC
Old piece of plywood 24"x48"x3/4"
Box of 3/8" Washers
Box of 3/8" Nuts
(4) 3/8"x3" Bolts
1-1/2 Wood Screws
2" Wood Screws
Drill Press/Hand Drill
3/8" Drill Bit
Band Saw/Hand Saw/Circular Saw/Dremel
Belt Sander/Sand Paper
Step 2: Moving Parts: Cutting
Start by measuring out the dimensions of the pieces and marking them on the wood. Do the measuring twice, because my great grandpa would always said "Measure twice, cut once." See below for the dimensions:
#1: (16) of the 1"x2" --4.625" length
#2: (16) of the 1"x2" --2.9" length
#3: (4) of the 1"x2"--7.125" length
#4: (8) of the 2"x3"--2.35" length
#5: (8) of the 1"x4" --6.25" length
#6: (2) of the 2"x3" --20" length
#7: (4) of the 2"x3" --10.5" length
#8: (8) of the 2"x4" --15" length
#9: (2) of the 1/2" PVC--20.5"length
Make sure to mark where you're going to drill in the next step. I did 0.5" from the "cut" edge and 0.75" from the other edge.
Once all of the pieces are marked, simply cut along the line and repeat for many more cuts.
Now you're going to need to cut the threaded rod:
(24) of 4.5"
(4) of 10.5"
Step 3: Moving Parts: Drill and Sand Wood
Now that all of your pieces are cut, you're going to need to drill the holes for the Round Rod to slide through. Drill at the center of the location that you marked on the wood piece with a 3/8" drill bit. Go slow to make sure you don't crack the wood.
Once all of the holes are drilled, sand the pieces so they are smooth.
Step 4: PVC Spacers
I decided to make my own spacers mostly because it was a cheaper option and they weren't that hard to make. Start out by marking the desired length on the PVC, which in this case for me was 3/4" and then either using a belt sander or sand paper just sand the surfaces so they are flat. Repeat this process for total of about 50 spacers.
Step 5: Table Top
Using a pencil, mark the center of the cross beam support and drill holes that are 3/8" in diameter that are 1" from the center of the of #6. These holes will match up with the holes that should be drilled in #5.
Lay the ply wood on the work surface and mark where you are going to be drilling. I marked off 4 holes that are 6" from the top and 2" from the side. Then drill small holes through the wood, these are starter holes for the screws which will hold the top together. Screw the top to the cross beam support piece (#6)
Next you're going to have to attach the table top to the start of the moving parts assembly. To do this use the 3/8" bolts through the cross beam support piece and the upper moving parts assembly.
Then attach #7 to the assembly with the 2" screws.
Step 6: Legs
I made a template to cut the notch in the legs using a #4 piece (which will go in there). Then i cut the notch out using a band saw, then sanded the surface so it was smooth and that #4 would easily fit. To attach #4 to #5 I used a 2" screw through the top and a 1-1/2" screw through one side to secure them. (pictures are in the next step)
Step 7: Moving Parts Assembly
This is the fun part, where the table starts really coming together.
First your going to bolt the bottom of #5 to #7, then attach #2 to #7 with the threaded rod, washers, spacers and nuts. Then #1 will go on the outside of #2, where #2 will use the middle hole of #1.
The bottom hole of #1 will attach to #3 and the upper hole will attach to #4 which connects to the legs(#8) with wood screws.
Then repeat this madness for all of the legs and joints.
I apologize if this is confusing, please see the pictures for a better understanding, its hard to perfectly describe in words.
Step 8: Finish
Then once all of the parts of the assembly are connected together, use the 4 pieces of #9. These will connect the legs to one another. For example the front outer left leg will connect diagonally to the back inner left leg. Just screw the plastic channel to the leg.
For a last and final step, sand down the surfaces of the table so there are no burrs. Then stain the wood to give it a better finished look if you want to.
to reduce the sliding and kick out factor on the tile floors here at school I added a "track" system for the legs to follow. You can see this in the close up video.
Using the leftover 1/2"PVC I cut a long channel for a screw that was attached to the top of the legs to run through.
First Prize in the