This is a CNC I built from scratch using mostly 3/4" x 3/4" x1/16" aluminum square tubing. I got the design by looking around for ideas on Google and mostly just improvised as I got to each phase.
The total cutting area is about 12" x 8" x 3" (X by Y by Z).
The rails and bearings required over 100 5/16" nuts.
I estimate that the whole thing cost approximately $650-$700 to build including Ontario taxes.
Note: I built the whole thing with a regular hammer drill (which has a switch to become a normal drill), a hack saw, and a jig saw. I had no drill press or chop saw that made perfect cuts/holes. Of course a drill press and chop saw would make the whole thing go a lot faster than it did for me.
In each step of this instructable, I will show what individual components I used.
If enough people (or any at all) want to build one like this then I will use SketchUp to create some plans. But for now, this is really just to give some ideas on how to build one yourself.
PLEASE CHECK OUT THE VIDEOS OF SAMPLE WORK AT THE END.
Step 1: Main Frame
The pipe is 3/4" galvanized steel pipe.
I spray-painted the frame matte white to make it look a little more pleasing. I am happy with how the finish turned out.
The length of the pipes are not so important so long as you have good clearance for all the axes.
It is important for the diameter of the pipe to be sufficient if the pipes are long. I have had to fasten the neck of the Z axis to the wall to restrict deflection.