Description:I want to build a 3d printing machine out of 1/4” plywood and wooden dowels. To win the prize, I need a 3d rendering, a explosion picture of the system and a dxf or dwg file showing all the parts laid out for cutting by a cnc machine.
The goal is to Repstrap a 3d printer similar to the Wally.
The first thing to do is review the Wally blog at forums.reprap.org/read.php
The next thing to review is the git hub site. github.com/NicholasSeward/ConceptFORGE/tree/master/Wally
This has all the files for dimensions and parts needed
This will be the starting point, nothing is set in stone, If you need things to be bigger or smaller, that is ok.
1. I have included a variety of pictures and ideas. Use them as you wish.
2. I see the arms built out of 3 layers of plywood. Bearing on top, bearing on bottom and the middle piece has a smaller diameter hole to keep bearings from falling through. Ply wood dowels should be used for indexing assembly.
3. Bearings are being used for both smooth motion and rigidity.
4. The frame and table should be tabbed so that the parts push together and self align.
5. The back is to be 2 layers. For a total of 1/2”. The back should be inset a 1/4” to allow for a future modification.
6. All parts that can ( brackets) should be tabbed to self align and position.
7. I would like to be able to flip one of the arms and have it line up with the other arm. This is for a future change to add a central carrier. (like in the original design)
8. Shaft connections to motors need to be figured out
9. To tighten the fishing line, I will be using guitat pegs. There needs to be a hole for a dowel to lock in position.
10. I would like to get all the pieces on the front side of the printer. If dimensions need to be made to frame, that is fine.
11. Bed will be multiple layers. There should be a bottom, a ring to open center to 1/2” (for a heated bed) and a pice of glass will sit on top of this.
12. Pulley to arm attachment. I have a couple of ides on this. One is to use a dowel into a bearing another is to tighten the bolt and then have a plywood key that fits around outside of bolt and keys into pulley or arm.
13. The bearings are cheap. If an extra bearing makes something easier, use it.
14. File will be cut using an 1/8th inch bit. Adjust slots for this. (ie. Add a 1/16th of an inch to each side
I am sure there will be lots of questions.
I will answer them as they come up.
I will also send a kit (plywood and bearings) to the winner.
Wants:I want a set of pieces I can cut out on a cnc machine. Originality and Creativity and the ability to tweak the design are needed
Ask for Sample:3d model, explosion view and dxf. Although I checked autocad, you can use whatever you want as long as I can open files with a free or opensource viewer
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