Print out the following:

12 Clevis Elbows - Male - Follow the Download link in the description!
12 Clevis Elbows - Female - Follow the Download link in the description!
1 Tritool Effector
3 Keyed Swivel Mounts
3 Servo Horn Arms
3 Servo Brackets
3 Tetrahedron Base pieces
1 Tetrahedron Top Piece
3 Tetrahedron Middle Pieces

Note: This design was meant to use 8mm threaded rod. I used 5/16 inch rod because it is difficult for me to get metric threaded rod. The design is such that either 8mm or 5/16th inch rod will both work great.

Build the Tetrahedron (three sided pyramid), I used precut 2' long 5/16 threaded rod that I bought from Home Depot. I purchased 6 2' pieces and one 3 foot piece. You can use whatever size you want, the design is scalable. Of course the limitation would be the diameter of the rod, you probably won't want to make the segments TOO long, because it will be unstable. You will also need around 42 5/16" nuts. The Tetrahedron Connectors are designed so the rod goes through the connector and pokes out the other side a little further than the width of a nut. A nut is supposed to be placed on each side of the connector for each rod piece that intersects with a connector (look at the pictures if that isn't clear). Don't forget the middle connectors will need nuts of their own threaded on. The length of the edges of the triangle that makes up the middle platform (where the servos sit) is 9 inches. This is an equilateral triangle too, so that means the middle platform sits 9 inches down from the top of the tetrahedron. Just cut the 3' foot pieces so you get 3 x 9" pieces.

Next you can put a piece of plywood or something on the middle platform. I used foam core. This piece doesn't need to be super sturdy in the bots current state. I have been running it fine with foam core. The piece of foam core I used is secured to the threaded rod with zip ties.

Next you can build the actual moving part of the robot. I used 5/16" wooden dowels around 7 inches long. You will need 6 of them. Connect the female clevis elbows to the ends of both sides of each dowel. Then you can attach the male clevis elbows with some 3mm nuts and bolts to the female clevis elbows (Sorry I can't stick to one unit of measurement, hardware stores in the USA don't carry Metric threaded rod). Now you are going to need some short 5/16" dowels to link the male elbows to each other and the keyed swivel mount and servo horn linkage. You can now attach the tri-tool to the keyed swivel mount. Don't attach the servo horn arm to the servos yet.

Now just mount your servos to your servo brackets. With this new servo bracket design, you will need to bolt them in too. I used more 3mm nuts and bolts to do this. Trust me, its alot easier they taking the servo apart and trying to jam it through the old servo mount. A *lot* can go wrong when you do that. I then secured my servo mounts to the platform using zip ties through the closed off rectangle of the servo bracket. I only used one zip tie on each and they seem to hold fine for now.

You probably want to hook up your micro-controller before you attach your servo arms to the servos. That way you can make sure they are all at the right positions (or you could manually move the servo to the maximum or minimum of the range with your hands). Now once you have the angle right attach the servo arms.

And now you should have a Delta Robot Test Platform!