This is first version of my low cost 3d printed robot arm. It is based on Ikea Tertial lamp. I choose it because it has very good kinematic with using springs to unload servos. So you can use different number of springs to achive diffrent lifting power.
You can find some information and download STL files for free at:
First of all you should take a look at BOM file and picture to get information about all components.
Your can find all information about infill and quantity of 3d printed parts there. Because Tertiarm use lamp as base you won't need to print big parts, so I hope it can be printed almost at all 3d printers. When you will be ready to start assembly Tertiarm, you should begin from disassembling lamp. You will need only 4 beam and 4 sping, if you be able to find same beams and springs you can do without buing ikea lamp. After making first prototypes, I have decided to cut all beam to 260mm, but you can choose other lenghth depends on your servo and goals.
Now you are ready to assemble 1 axis.