Now, a comment on the 3D printers. What can they make that actually useful to justify spending 1500 to build your own or $3000 to $5000 for a commercial unit?
Most everything make by 3D printers shown were figurines, vases, and geometric toys. (Ugh). Give me something I can use.
For this hobby, the only use I see is to modify the machine to print wax to do lost wax casting.
1) 3 d printing not necessarily for everyone. No fabrication technology suitable for every task.
2) some would argue we are crazy to spend 1K plus on a lathe another 1K on a mill and another 1-2 K for tooling to build engines. One can buy a PM research machined kit for $150 or so and after all what do they do.
A 3d printer is another shop tool to make things with.
3) so what can one make. This is an open question. but will say anything you can imagine and design withing the law of physics that apply to 3-d printing.
a) art museums are uploading files for things to print. I may never see the original venus de milo, maltese falcon, statue of Athena or the bone of a dinosaur. And if I was able to see them touch would never be allowed. To me being able to print a replica of classic art and hold it in hand is a great educational experience.
And for the blind to be able to hold and touch a replica of a statue in his or her own home priceless.
b) music people are printing electric violins , kazoos and other things so folks can make there own music.
c) repairs how many times have we needed a simple part for an object in out home and it is not commercially available of only available as part of an expensive kit.
d) Pattern making use as a pattern for sand casting or investment casting burnout the pla as you would wax.
e) Engines made a abs or PLA air engine. Something to get the kids interested in this hobby.
f) the future strides are being made in material. Nylon is now an option. Pla is being mixed with wood and bronze. So one can print in bronze (80%) or wood. Carbon fiber and elastomer filaments are hitting the market. So one cant print o-rings gasket and seals.
g) one of the appeals to the maker movement is self replication.
Many of the parts on 3-d printers are printed with a 3-d printer. Some are lazer cut wood some are metal. But the point is if you have a 3-d pinter a a set of files to make the parts and a shopping list for rods bearings motors you can build your own
Like any other tool if you do not or can not see the value and potential you probably should not buy it.
In 20 years we may see affordable metal printers
As far as price? From my recent research there are many choices in 3-d printing in the $500 - $1000 price range this includes kits and assembled in USA pre build pre tested commercial models. I am also seeing shipped from the USA chinese replicas. so shop around and read descriptions carefully.
In 20 years we may see affordable metal printers
Tin